DENISON HYDRAULICS Premier Series. open loop pump controls series P080. service information

DENISON HYDRAULICS Premier Series open loop pump controls series P080 service information Publ. S-AM0 Internet: http://www.denisonhydraulics.com E-mail: denison@ denisonhydraulics.com

CONTENTS typical characteristics------------------------------------------------------------------------------- fluid connections------------------------------------------------------------------------------------- introduction------------------------------------------------------------------------------------------ general--------------------------------------------------------------------------------------------- description----------------------------------------------------------------------------------------- pressure compensator---------------------------------------------------------------------------- remote compensator control--------------------------------------------------------------------- load sensing control------------------------------------------------------------------------------ torque limiter-------------------------------------------------------------------------------------- rotary servo control------------------------------------------------------------------------------- hydraulic stroker---------------------------------------------------------------------------------- electric stroker------------------------------------------------------------------------------------- pressure compensator override and torque limiter override-------------------------------- troubleshooting chart------------------------------------------------------------------------------- pressure compensator parts list------------------------------------------------------------------- figure & parts list, maximum volume stop-------------------------------------------------- figure & parts list, maximum volume handwheel------------------------------------------- compensator disassembly, assembly, test------------------------------------------------------- figure & parts list, compensator cap--------------------------------------------------------- buck-up cap disassembly, assembly------------------------------------------------------------ figure & parts list,buck-up cap---------------------------------------------------------------- electric stroker parts list---------------------------------------------------------------------------- electric stroker disassembly, assembly, test--------------------------------------------------- figure, electric stroker-------------------------------------------------------------------------- figure, servo cap--------------------------------------------------------------------------------- parts lists for figure and figure ------------------------------------------------------------- control cap disassembly, assembly------------------------------------------------------------- figure & parts list, control cap---------------------------------------------------------------- torque limiter override disassembly & assembly--------------------------------------------- figure 8 & parts list, torque limiter override-------------------------------------------------- figure 9 & parts list, torque limiter override cap--------------------------------------------- torque limiter override test and adjustment--------------------------------------------------- compensator override disassembly, assembly, test------------------------------------------- figure 0 & parts list, compensator override-------------------------------------------------- hydraulic stroker parts list------------------------------------------------------------------------- hydraulic stroker disassembly, assembly, test------------------------------------------------- figure & parts list, hydraulic stroker-------------------------------------------------------- torque limiter parts list----------------------------------------------------------------------------- torque limiter disassembly & assembly-------------------------------------------------------- figure, torque limiter-------------------------------------------------------------------------- figure, torque limiter cap--------------------------------------------------------------------- parts lists for figure and figure ---------------------------------------------------------- torque limiter test and adjustment-------------------------------------------------------------- rotary servo parts list------------------------------------------------------------------------------- rotary servo disassembly, assembly, test------------------------------------------------------- figure & parts list, rotary servo------------------------------------------------------------- load sensing control parts list--------------------------------------------------------------------- load sensing control disassembly, assembly, test--------------------------------------------- figure & parts list, load sensing control--------------------------------------------------- hydraulic circuits------------------------------------------------------------------------------------ pressure compensator---------------------------------------------------------------------------- pressure compensator with load sensing configuration-------------------------------------- torque limiter-------------------------------------------------------------------------------------- manual rotary servo------------------------------------------------------------------------------ manual rotary servo with compensator override--------------------------------------------- manual rotary servo with torque limiter override-------------------------------------------- electric stroker------------------------------------------------------------------------------------- electric stroker with compensator override---------------------------------------------------- electric stroker with torque limiter override--------------------------------------------------- hydraulic stroker---------------------------------------------------------------------------------- hydraulic stroker with compensator override------------------------------------------------- hydraulic stroker with torque limiter override------------------------------------------------ load sensing control------------------------------------------------------------------------------ stroker performance-------------------------------------------------------------------------------- installation drawings-------------------------------------------------------------------------------- controls key sheet------------------------------------------------------------------------------------ technical data conversions------------------------------------------------------------------------- Pump seal kit (includes all controls) S- See key sheet pg. for information PAGE 8 9 0 0 8 9 0 8 9 0 8 8 8 9 9 9 0 0

CHARACTERISTICS TYPICAL CHARACTERISTICS Specification Term P080 compensator response off-stroke on-stroke (per SAE J Apr. 8 at bar) compensator adjustment sec. sec. bar/turn 0,00 0,0* 8 minimum compensating pressure (comp, load sensing, torque limiter) bar,8** minimum servo pressure for 00 bar system pressure minimum compensator override pressure at 8, bar servo pr. (servo, elec. & hyd. str. ) bar bar 8,** 8,** torque limiter adjustment range code J code K Nm Nm 90-0 over 0 typ. servo & stroker response @ 8 bar servo pressure, zero to full stroke and vice versa servo flow required for this response (E, H, R0 controls) servo flow required for this response (-J, -K, *P controls) maximum servo pressure servo shaft rotation, 0 to full volume displacement/rev./degree servo shaft rotation torque to turn rotary servo shaft sec. l/min. l/min bar degrees cc/rev/deg. Nm <0,,, 0,, hydraulic stroker control pressure 0 disp. full disp. bar bar,, electric stroker control amps (V) electric stroker control amps (V) 0 disp. full disp. 0 disp. full disp. pulse width modulation frequency: Denison Hydraulics electric stroker accessories mating connector: Din 0 type AF part no. -0008-8 (provided) Jupiter driver S0-08 Jupiter power supply S0- Options card S0-ll Venus controller 00-0 electric stroker nominal coil resistance (v. coil) electric stroker nominal coil resistance (v. coil) ma ma ma ma Hz ohms ohms 90 0 80 00-0 0 handwheel turns, full to zero stroke turns 9 torque to turn handwheel @ 0 bar torque to turn handwheel @ 00 bar Nm Nm 9 0 FLUID CONNECTIONS port C, C (cylinder gage ports) port E (electric stroker control pressure inlet) port H (hydraulic stroker control pressure inlet) port LS (load sensing port) port V (compensator vent) port X (rotary servo, electric & hydraulic stroker servo inlet) BSPP BSPP BSPP BSPP BSPP BSPP / / / / /8 /8 NOTES *on-stroke response for compensator override is determined by servo/stroker response. **add case pressure

INTRODUCTION GENERAL DESCRIPTION OF OPERATION PRESSURE COMPENSATOR PRESSURE COMPENSATOR LOAD SENSING CONFIGURA- TION LOAD SENSING CONTROL TORQUE LIMITER The instructions contained in this manual cover complete disassembly and reassembly of the controls. Before proceeding with the disassembly or reassembly of any unit, this manual should be studied in order to become familiar with proper order and parts nomenclature. A piloted three-way valve spool and sleeve combination is the nucleus of the control function. For the compensator, torque limiter and load sensing controls, system pressure is applied to the input port of the valve, and to one end of the spool. A small orifice feeds this pressure to the other end of the spool,. A spring on this end biases the spool to normally port the control piston to pump case. This control piston links to the pump cam. On the opposite side of the control piston, a spring and a piston connected to system pressure along with pump timing forces, combine to put the pump on stroke. A spring-loaded cone and seat connected to the spring end of the three-way spool establishes an adjustable pressure limit on this end of the spool. When system pressure reaches this value, flow through the spool creates a pressure difference across the spool. At approximately,8 bar difference, the spool shifts toward the spring, re-directing the control cylinder port to pressure. This pressure applied to the control piston overcomes the forces putting the pump on stroke, causing the pump to reduce displacement. When the pump pressure drops, the spool shifts the other way to maintain the pump pressure at approximately,8 bar above the controlled pressure on the spring side. The spring end of this three-way spool may also be connected to a remote pressure control, through the vent port, V. Flow through this port, when controlling, is approximately,9 l/m. For load sensing, this V port is connected to the load. The valve between the pump and the load meters the flow. The pump provides the flow to develop,8 bar drop across the valve independent of the load pressure and thus establishes a constant flow independent of operating pressure. Adjustment of spring load on the three-way spool allows precise control of the differential pressure. Where the approximately,9 l/m vent flow is unacceptable, and where multiple loads are to be controlled, a load sensing control is available. In the load sensing control, the vent flow is modulated by a valve which senses load pressure and establishes the pump compensator pressure at bar above load pressure. There is essentially no flow in the sensing line. For constant torque, system pressure and pump displacement are interrelated by the formula P V=C. As pressure increases, displacement must reduce, and vice versa. A linkage to the pump control piston slides a spool over a pin.. The pin contains a cross drilled hole, and a connecting drilling to one end. This pin passes through a bore in the torque limiter housing connecting to the vent port of the compensator. The pressure in the vent port applies a force on the pin, which is resisted on the other end by a two spring combination. The pin positions itself to where the vent pressure force on the one end is balanced by the spring force on the other end. When the cross drilled hole opens, it causes the three-way spool to shift to direct system pressure into the control piston, reducing stroke. The linkage to the control piston causes the spool to move in the direction to close the cross-drilled hole. Thus, for every position of the pin, there is a corresponding position for the control piston. The position of the pin is determined by the pressure, the spring rate, and the initial adjustment on the springs. As pressure increases, pump stroke must reduce. At low pressure, only the outer spring contacts the spool. As pressure increases, the second spring also makes contact. Thus the rate of change of pressure starts at a low initial rate when the pump is at full stroke and changes to a high rate at reduced stroke, to approximate the P V=C relationship. The normal compensator function is retained to provide a maximum pressure limit. ROTARY SERVO CONTROL The rotary servo control is mounted on the off-stroke side of the control piston. The control piston has a large diameter on this side, and a smaller diameter on the opposite side. Servo pressure is connected to the input port on the three-way valve, and also to the smaller diameter side of the control piston. When the three-way spool is at rest, this end of the control piston is ported to tank, and servo pressure applied to the opposite, smaller diameter piston causes the rocker cam to stroke to minimum. When the three-way spool shifts, pressure is directed into the larger diameter of the control piston causing the cam to shift towards full stroke. The pin as described for the torque limiter, is spring loaded against a mechanism which converts rotary motion of the input shaft to linear motion of the pin, thus positioning pump stroke proportionately to input shaft rotation. HYDRAULIC STROKER In the hydraulic stroker, a spring loaded piston is attached to this pin. A control pressure of, bar causes the piston to commence to move against the spring, to position the pin in proportion to the control pressure, and thus cause the pump to stroke in proportion to control pressure. Full stroke is achieved at, bar control pressure.

INTRODUCTION ELECTRIC STROKER PRESSURE COMPENSATOR AND TORQUE LIMITER OVER- RIDE By mounting an electrically modulated pressure control valve on the hydraulic stroker to establish the control pressure, pump stroke is controlled by an electrical signal. At approximately ma electrical signal, the pump commences to stroke, and at approximately 90 ma, the pump will be at full stroke. The Denison Hydraullics Venus controller 00-0, Jupiter S0-08, or Jupiter S0-08 may be used to drive the electric stroker. An override pressure compensator or torque limiter control is mounted on the on-stroke side of the control piston opposite the servo, hydraulic or electric stroker. The port on the override control which normally connects to cylinder in the at-rest position is connected to servo, allowing normal stroker control. When system pressure or torque exceed the override setting, system pressure is supplied to the smaller diameter control piston to override the command and reduce stroke to the compensator or torque limiter setting. TROUBLESHOOTING CHART Effect of Trouble Possible Cause Fault Which Needs Remedy Compensator, Compensator Override Low system pressure Compensator malfunction Dirt in spool orifice Damaged cone or seat Broken differential spring Improperly adjusted differential spring Failure to compensate Differential adjustment Differential set too high Sluggish response Differential adjustment Differential set too low Wide pressure fluctuations (hunting) Excessive line capacitance Install check valve near pump outlet Load Sensing Control Low system pressure See above Failure to compensate See above Sluggish response Differential adjustment Differential set too high Modulating valve Air in load sensing line Wide pressure fluctuations (hunting) Excessive line capacitance Install check valve near pump outlet Modulating valve Air in load sensing line Excessive pressure drop across Differential adjustment Differential set too high control valve Poor control of flow Differential adjustment Differential set too low Torque Limiter, Torque Limiter Override Torque setting erratic Torque limiter cap malfunction Sticking pin Torque incorrect at high flows Incorrect torque setting Outer adjustment screw Torque incorrect at low flows Incorrect torque setting Inner adjustment screw Too much torque variation Wrong torque limiter for range Replace inner/outer springs with correct springs Low system pressure Compensator malfunction Dirt in spool orifice Damaged cone or seat Broken differential spring Improperly adjusted differential spring Failure to compensate Differential adjustment Differential set too high Sluggish response Differential adjustment Differential set too low Wide pressure fluctuations (hunting) Excessive line capacitance Install check valve near pump outlet Rotary Servo Failure to stroke Differential adjustment Differential set too low Goes to full Differential adjustment Differential set too high Sluggish response Low servo pressure Check servo pressure Strokes in steps Servo cap malfunction Sticking pin Wear on linkages or input cam surface Hydraulic Stroker Failure to stroke Differential adjustment Differential set too low Goes to full Differential adjustment Differential set too high Strokes in steps Servo cap malfunction Wear on linkages, Sticking stroker piston Electric Stroker Failure to stroke Differential adjustment Differential set too low Goes to full Differential adjustment Differential set too high Excessive hysteresis Electric proportional valve Change dither on electrical signal No response Electric proportional valve Faulty wiring, Filter screen plugged Strokes in steps Servo cap malfunction Wear on linkages Sticking stroker piston Instability Air in control Bleed air from control Check for air in servo supply General Cannot achieve full volume Maximum volume stop Back out max. volume stop Cannot achieve zero volume Minimum volume stop Back out min. volume stop Noise Air in system Aerated reservoir Leaky inlet line Trapped air in system

PRESSURE COMPENSATOR CCW ROTATION CW ROTATION ITEMS C0 8 9 C0 NOT SHOWN PRESSURE COMPENSATOR parts list P080 QTY. ITEM DESCRIPTION. PART NO. C0 C0 Max. Vol. Stop (Fig. ) S- Max Vol. Handwheel (Fig. ) S-8 * Compensator Control (Fig. ) S- Compensator Control S- Buck Up Cap (Fig. ) S- Screw-H.H.C.,M x mm -0 8 Screw-H.H.C., M x mm -0 Control Piston 0-98 O-Ring, 0 S- ARP 0-000 8 O-Ring, 0 S- ARP -00 9 Piston Ring 0-98 *includes items,,

PRESSURE COMPENSATOR PARTS LIST FOR FIGURE, MAX. VOL. STOP S- ITEM DESCRIPTION PART NO. QTY. Plug 8HPN-S 88-08 O-Ring, 90 S- ARP 908 9-00908 Nut, M Hex 0-98 Screw, Soc. Set -000 O-Ring,0 S- ARP - 00 FIGURE MAXIMUM VOLUME STOP MAXIMUM VOLUME HANDWHEEL DISASSEMBLY. See Fig.. Remove the two screws holding the bracket () to the control cap.. Turn the handwheel counter-clockwise to remove the stop screw from the control cap.. Remove nut () and handwheel () from the stop screw ().. Remove nut (). Screw () may now be slipped through the bracket () to examine parts and to replace O-ring ().. Seat (0) rotates and pivots on ball (8), and is retained by pressing two balls (9) into screw (). Replace assembly if damaged. 8 0 FIGURE HANDWHEEL MAXIMUM VOLUME STOP 9 ASSEMBLY. Install ball (8) and seat (0) in screw ().. Press balls (9) into screw () to retain seat.. Install O-ring () on screw (). Lubricate O-ring and slide screw into bracket (). Install remaining parts.. Turn handwheel clockwise into cap till the screw contacts the control piston.. Install and torque the assembly screws to 0 Nm. PARTS LIST FOR FIGURE, HANDWHEEL S-8 ITEM DESCRIPTION PART NO. QTY. Bracket 0-90 Screw 0-90 Nut, Hex /- UNC -000 Handwheel 0-99 Nut, Elastic Stop /- -000 O-Ring, 90 S- ARP 9-00 O-Ring, 90 S- ARP-8 9-008 8 Ball 0-00 9 Ball 0-000 0 Seat 0-908

PRESSURE COMPENSATOR COMPENSATOR DISASSEMBLY ASSEMBLY COMPENSATOR TEST AND ADJUSTMENT. See Figure. Back off max. volume screw or handwheel to full displacement. Remove max. volume screw or handwheel assembly.. Remove bolts holding cap to pump.. Remove plug () and attached parts. Remove spring () and spool (8).. Remove adjusting plug () and attached parts. Remove seal piston (). Note: a 0- screw may be used to assist in pulling the piston. Remove spring () and cone (8).. Do not remove sleeve in body (). Sleeve is pressed into cap and finished to size. If sleeve or cap is worn, replace the cap-sleeve assembly ().. Examine seat (0) for wear. Do not remove unless damaged.. Install Avseal plugs (9) and orifice (9) in body.. Press seat (0) into bore squarely against shoulder in bore.. Install O-ring () in bottom of bore as shown. Install spool (8) into bore as shown. Install spring () over end of spool. Install O-ring () on seal piston (). Lubricate and install into plug (). Install O-ring () on plug (). Install plug () into cap. Install screw () and nut ().. Install O-ring () on seal piston ().. Lubricate O-ring and install cone (8), spring () and seal piston into bore in cap (), being careful that cone enters seat (0). Install remaining parts. Torque plug () to 0 Nm. Torque plug () to Nm. Torque plug (8) to 0 Nm.. Note proper location for cap on pump. Install O-rings on interface between cap and pump control pad.. Install cap on pump control pad, guiding the control piston into the bore. Install maximum volume stop assembly. 8. Torque mounting bolts to 0 Nm. Compensator is to be tested on pump. Adjust maximum volume stop to full displacement by backing off stop till there is no contact with the control piston.. Install gages on system pressure and on compensator vent ports.. Turn compensator adjustment screw () CCW until there is no contact with spring, then adjust / turn CW after contact is made with spring.. Turn differential adjustment screw () CCW until there is no contact with spring, then adjust / turn CW after contact is made with spring.. System relief valve should be set at bar. If testing on application, apply a load to pump.. Start prime mover. Pump should be at full displacement at bar.. Increase system relief valve or load until compensator de-strokes pump to zero displacement. Set compensator to 0 bar.. Adjust compensator differential spool pressure to,8 bar. This is accomplished by adjusting the differential screw until the difference in pressure readings between the system pressure and compensator vent gages installed in the compensator cap is,8 bar. (It may be necessary to change differential to gain stability. Use caution when exceeding bar to avoid spring going solid, preventing compensator action.) 8. Set the compensator to 0 bar, bar, and 00 bar. 9. At each condition, increase the system pressure until the pump fully de-strokes. At no time should the system pressure vary more than 0, bar from the compensator setting. The control should be steady and stable at all conditions. 0. Reduce pressure to 0, bar below the compensator setting. Pump should return to full stroke. Repeat two or more times. Compensator setting should be repeatable.. Set compensator adjustment to the required setting, or Bar if not otherwise noted. Install cap () on differential adjustment. 8

PRESSURE COMPENSATOR DIFFERENTIAL ADJUSTMENT COMPENSATOR ADJUSTMENT FIGURE COMPENSATOR COMPENSATOR VENT /8 BSPP TORQUE Nm CONTROL PRESS. PORT / BSPP TORQUE 0 Nm SYSTEM PRESSURE / BSPP TORQUE 0 Nm PARTS LIST FOR FIGURE compensator C0, S- compensator C0, S- ITEM DESCRIPTION PART NO. QTY. Cap-Sleeve Assembly S-0 Adj. Plug 0-98 Soc. Setscrew /- x -0 Nut, /- -00 Seal Piston 0-9 O-Ring, 90 S- ARP 0 9-000 Spring 0-998 8 Cone 0-88 9 Avseal Plug -000 0 Seat 0-9 Spring 0-08 Plug, BSPP / -0008 O-Ring, 90 S- ARP 90 9-0090 O-Ring, 90 S- ARP 0 9-000 Plug 0-8 Seal Piston 0-90 Cap 9-00 8 Spool 0-98 9 Orifice Plug 0-8 Soc. Setscrew /- x -/ -80 Acorn Nut 0- Plug, BSPP /8-000 8 Plug, BSPP / -000 9

PRESSURE COMPENSATOR FIGURE BUCK-UP CAP BUCK-UP CAP DISASSEMBLY TORQUE 90 Nm. See Figure Set maximum volume stop to full stroke. Remove screws holding cap to pump. Caution! Spring load could cause injury!. Remove cap assembly from pump.. Remove and examine spring () and piston (). If sleeve () is worn, press it out and replace. ASSEMBLY PARTS LIST FOR FIGURE P080 buck-up cap S-. Install Avseal plug () into cap. Press sleeve () into cap to shoulder. Install O-ring () and plug () into cap. Torque plug to 90 Nm. Install spring () and piston ().. Install O-rings on interface between cap and pump control pad. Install cap assembly on pump housing as indicated on the applicable view, guiding the control piston into the bore.. Torque the assembly bolts to 0 Nm. P080 ITEM DESCRIPTION PART NO. QTY. Piston 0-90 Spring 0-90 Sleeve 0-90 Control Cap 0-98 O-Ring 9-0090 Plug 0-90 Avseal Plug -000 0

ELECTRIC STROKER NOT SHOWN CCW ROTATION E0 NOT SHOWN EJ, EK EP CW ROTATION NOT SHOWN 8 9 0 ELECTRIC STROKER parts list P080 QUANTITY ITEM DESCRIPTION. PART NO. E0 EJ EK EP Electric Stroker (Fig. ) S-0 Control Cap (Fig. ) S- Low Torque Override (Fig. 8) S- High Torque Override S- Comp. Override (Fig. 0) S- * O-Ring, 90 S- ARP 9-00 * Elbow 9-09 * Tube, CW 0-90 Tube, CCW 0-9 ** Screw-H.H.C., M x mm -0 ** Screw-H.H.C., M x mm -0 8 Control Piston 0-98 9 O-Ring, 0 S- ARP 0-000 0 O-Ring, 0 S- ARP -00 Piston Ring 0-98 Piston Ring 0-98 *Tubing assembly including items,, and are available as S-0 (CW), S-0 (CCW) **Included with items,

ELECTRIC STROKER ELECTRIC STROKER DISASSEMBLY. See Figure. Remove screws () holding block () to body ().. Remove screws holding body () to cap assembly ().. Remove all parts from body () except pin (0) and arm assembly (8). It is not necessary to remove these parts unless broken or worn. Examine parts for wear or damage.. Remove screw (). Examine head for excessive wear, and body for smooth sealing surface with O-ring.. See Figure. Remove tube lines to cap assembly. ASSEMBLY TEST AND ADJUSTMENT. Remove screws holding cap assembly to pump body.. Remove cap assembly (). Remove plug () with attached parts. Remove spring () and spool (). 8. Do not remove sleeve in body (). Sleeve is pressed into cap and finished to size. If sleeve or cap is worn, replace the cap-sleeve assembly (). 9. Remove cap (9), screw () and nut (). Remove the retainer ().. See Figure. Install Avseal plug (9) in cap.. Install spool () into bore as shown. Install spring () over end of spool.. Install O-ring (8) on spring retainer (). Install retainer (), screw (), and nut () in plug ().. Install O-ring () in bottom of bore as shown. Install O-ring (0) on plug (). Install plugs () and () in body (). Torque plugs to 0 N m. Install O-ring (8) in cap.. Turn screw () in until spring retainer () contacts spring (). Turn an additional -/ turns and lock in position.. Note proper location for control on pump. Install O-rings on interface between cap and pump control pad. Install cap on pump control pad, guiding the control piston into the bore.. Torque two assembly bolts to 0 N m. 8. See Figure. Apply Loctite on threads of screw (), lubricate the shank, thread through the cap into the control piston, and torque to,8 N m. 9. Install minimum stop screw () and turn clockwise to stroke pump to full volume. Measure height from control cap to top of screw (). With control piston at full stroke, dimension must be 9, +/- 0, mm. Back out minimum stop screw () till there is no contact with control piston. 0. Press dowel (0) into body (), through the link (8), to, mm below surface, apply Loctite hydraulic sealant to threads of screws () and install over dowel (0).. Press spool () into retainer (9). Caution: do not use excessive force. Place spool/retainer assembly into spool () with spring (8) and washer (). Secure with retaining ring ().. While sleeve () is engaged into dowel on link (8), slide above spool assembly into bore of body (), and through sleeve (). Spool () must move freely and easily at all positions of the link (8).. Install proportional valve () in block. Torque to N m.. Install coil on proportional valve. Torque to,-,8 N m max.. Assemble all other components into body () per Figure. Torque the plug () to 0 N m.. While spring retainer is engaging clevis pin () under dowel of link (8), slide the other opening of spring retainer over the top of the screw (). Attach body assembly () to cap () with two screws and torque to 0 N m.. Plumb 8,8 bar servo supply to control. Supply 8,8 bar to the electric stroker servo supply port. Note: All pressure references are above case pressure (, bar max.). Thread zero screw () so that pump is on stroke.. Place a gage in the proportional valve gage port.. Start pump.. Adjust amperage (approx. ma) to give, bar reading on the proportional valve gage port. Back out zero screw () and adjust screw (9) until output flow is at

ELECTRIC STROKER zero stroke position. Lock both adjustments in place.. Increase amperage to 90 ma. Pump should go to full stroke. Set max. volume screw on opposite control cap for full stroke. Gage in proportional valve gage port should read approximately, bar.. If pump fails to go towards full stroke, or fails to go towards zero stroke, differential pressure may be improperly adjusted. Re-adjust the screw ( figure ) out to go towards full or in to go towards zero flow. When correct, lock in place and install cap on differential adjustment. 8. Increase and decrease the amperage between 0 and 90 ma several times at approximately, bar, 0 bar and bar system pressure. Pump stroke should follow amperage smoothly and proportionally. Full to zero or zero to full stroke should be achieved in 0, second. Adjust amperage up to ma from zero stroke, then adjust down from full stroke to ma. The flows at the two ma settings shall not vary more than 0 l/m from each other. 8 8 Loctite hyd. sealant 9 0 8 9 8 9 8 9 0 Loctite Torque,8 Nm 0 Nm 0 Nm TORQUE 0 Nm CYL. PRESSURE PORT / BSPP TORQUE 0 Nm 9 Servo inlet /8 BSPP 0 8 9 FIGURE ELECTRIC STROKER DIFFERENTIAL ADJUSTMENT 0 SERVO INLET /8 BSPP 9 TORQUE Nm 8 FIGURE SERVO CAP

ELECTRIC STROKER PARTS LIST FOR FIGURE electric stroker S-0 ITEM DESCRIPTION PART NO. QTY. Cap (Figure ) S-9 Screw 0-9 Clevis pin -0000 Spring, Compression 0-900 Plug, Avseal -000 8 Nut, /- -00 9 Soc. Setscrew, /- x -/ -80 0 Seal Piston 0-998 O-Ring, 90 S- ARP 0 9-000 Plug 88-08 Spring Cap 0-9 Spring -90 Body S-9 Spool 0-9 8 Spring -909 9 Spring Retainer 0-9 0 Nut, M 0-98 Spool 0-98 O-Ring,0 S- ARP -00 Soc. Setscrew -000 Plug, HPN-S 88-0 O-Ring, 90 S- ARP 9 9-009 Sleeve 0-9 8 Arm assembly S-0 9 O-Ring, 0 S- ARP 0-000 0 Dowel Pin, /8 Dia x.0 Lg. -088 Ret. Ring -00 Washer 0-9 O-Ring, 0 S- ARP 0-000 Block 0-909 Screw, HHC, /-0 x / 0-08 8 Adapter 0-90 9 O-Ring, 90 S- ARP 908 9-00908 Prop. Pr. Cont. Valve -0008 Coil, VDC -0008 Connector -0008-8 O-Ring, 90 S- ARP 90 9-0090 Plug, SAE- 88-0 Screw, SHC 0- x / -090 O-ring, 0 S- ARP 00-0000 8 Seal 9-000 PARTS LIST FOR FIGURE servo cap S-9 ITEM DESCRIPTION PART NO. QTY. Cap/Sleeve S-0 Plug -000 Plug 0-98 Plug 9-0099 Spool 0-98 Spring retainer 0-98 8 O-Ring, 90 S- ARP 0 9-000 9 Avseal Plug -000 0 O-ring, 90 S- ARP 90 9-0090 Spring 0-98 Plug, BSPP / -0008 Screw, / - x -0 Nut, /- -00 O-ring, 90 S- ARP 0 9-000 Plug -000 8 O-Ring, 0 S- ARP 008-00008 9 Cap 9-00

ELECTRIC STROKER CONTROL CAP DISASSEMBLY ASSEMBLY. See Figure. Remove cover () and Max. volume screw ().. Remove screws holding cap to pump.. Remove cap assembly from pump.. Install O-rings on interface between cap and pump control pad. Install cap on pump housing as indicated on the applicable view, guiding the control piston into the bore.. Torque the assembly bolts to 0 Nm.. Install screw () in cap. Install O-ring () on nut (). Install nut () on screw.. Adjust screw till pump is slightly on stroke and lock nut ().. Install O-ring () on plug (). Install plug in nut (). Torque plug () to 8 Nm. TORQUE 8 Nm FIGURE CONTROL CAP ASSEMBLY PARTS LIST FOR FIGURE control cap assembly S- ITEM DESCRIPTION PART NO. QTY. Control Cap 0-99 Plug 9-0099 O-ring, 0 S- ARP -00 Screw, M - x 80-000 Nut 0-98 Plug 88-08 O-ring 90 S- ARP 908 9-00908

TORQUE LIMITER OVERRIDE TORQUE LIMITER OVERRIDE DISASSEMBLY ASSEMBLY. See figure 8. Remove screws holding torque limiter body () to cap assembly ().. Remove all parts from torque limiter body () except pin (0) and arm assembly (8). It is not necessary to remove these parts unless broken or worn. Examine parts for wear or damage.. Remove screw (). Examine head for excessive wear, and body for smooth sealing surface with O-ring.. Remove maximum volume stop assembly (items,,, 0 and ).. Remove cap assembly ().. See fig. 9. Remove plug () and attached parts. Remove spring () and spool (8).. Remove adjusting plug () and attached parts. Remove seal piston (). Note: a 0- screw may be attached to assist in pulling the piston. Remove spring () and cone (8). 8. Do not remove sleeve in body (). Sleeve is pressed into cap and finished to size. If sleeve, snout or cap is worn, replace the cap-sleeve assembly (). 9. Examine seat (0) for wear. Do not remove unless damaged.. See figure 9. Install Avseal plugs (9) and orifice (9).. Press seat (0) into bore squarely against shoulder in bore.. Install spool (8) into bore as shown. Install spring () over end of spool. Install O- ring () on seal piston (). Lubricate and install into plug (). Install O-ring () in bottom of bore as shown. Install O-ring () on plug (). Install plug () into cap. Install screw () and nut ().. Install O-ring () on seal piston ().. Lubricate O-ring and install cone (8), spring () and seal piston into bore in cap (), being careful that cone enters seat (0). Install adj. plug (), screw (), nut (), and acorn nut ().. Install plug () and torque to 0 Nm. Install plug (). Torque to Nm.. Carefully install O-ring (0) into the cap. 8. Note proper location for cap. Install O-rings on interface between cap and pump control pad. Install cap assembly on pump, guiding the control piston into the bore. Torque two mounting screws to 0 Nm. 9. See figure 8. Install maximum stop screw (), cover (0),O-ring () and plug () with O-ring (). 0. Apply Loctite on threads of screw (), lubricate the shank, thread through the cap into the control piston, and torque to,8 Nm.. Measure height from control cap to top of screw. With control piston at zero stroke, dimension must be 9, +/- 0, mm.. Press dowel (0) into body (), through the link assembly (8), to, mm below surface. Apply Loctite hydraulic sealant to threads of screws () and install over dowel (0).. While sleeve () is engaged into dowel on link (8), slide spool () into bore of body (), and through sleeve (). Spool () must move freely and easily at all positions of the link (8).. Assemble remaining parts per drawing. Torque plugs () to 8 Nm.. While spring retainer is engaging clevis pin () under dowel of link (8), slide the other opening of spring retainer over the top of the screw (). Attach body assembly () to cap () and torque assembly screws to 0 Nm.

TORQUE LIMITER OVERRIDE HIGH FLOW PRESSURE ADJUSTMENT HIGH PRESSURE FLOW ADJUSTMENT TORQUE 8 Nm LOCTITE HYD. SEALANT LOCTITE TORQUE,8 Nm FIGURE 8 TORQUE LIMITER OVERRIDE PARTS LIST FOR FIGURE 8 torque limiter override code J S- code K S- P080 QTY. ITEM DESCRIPTION PART NO. **J **K Cap (Figure 9) S- Screw 0-9 Clevis pin -0000 Spring, Compression 0-900 Plug, Avseal -000 8 Screw 0-9 9 Nut, Hex Jam /-0 UNC 0-0008 0 Hex Nut, /- UNF 0-99 Plug, 8HP N-S 88-08 O-ring, 90 S- ARP 908 9-00908 O-ring, 0 S- ARP -00 Screw, Primary Adjust 0-9 Body assembly S-9 Outer Spring J Version 0-90 Outer Spring K Version 0-90 8 Inner Spring J Version 0-90 Inner Spring K Version 0-9 9 Spring Retainer 0-989 0 Nut, M 0-98 Spool 0-98 O-ring, 0 S- ARP 8-008 Screw, M - x 80 mm -000 Plug, HPN-S 88-0 O-Ring, 90 S- ARP 9 9-009 Sleeve 0-9 8 Arm assembly S-0 9 O-Ring, 0 S- ARP 0-000 0 Dowel Pin, /8 Dia. x.0 Lg.. -08 Screw, SHC 0- x / -090 Nut 0-9 O-Ring, 0 S- ARP 00-0000

TORQUE LIMITER OVERRIDE COMPENSATOR ADJUSTMENT DIFFERENTIAL ADJUSTMENT CYLINDER PRESSURE PORT / BSPP TORQUE 0 Nm SYSTEM PRESSURE / BSPP TORQUE 0 Nm FIGURE 9 TORQUE LIMITER OVERRIDE CAP PARTS LIST FOR FIGURE 9, torque limiter override cap S- ITEM DESCRIPTION PART NO. QTY. Cap-Sleeve Assembly S-8 Adj. Plug 0-98 Soc. Setscrew /- x -0 Nut, /- -00 Seal Piston 0-9 0-Ring, 90 S- ARP 0 9-000 Spring 0-998 8 Cone 0-88 9 Avseal Plug -000 0 Seat 0-9 Spring 0-08 Plug, BSPP / -0008 O-Ring, 90 S- ARP 90 9-0090 O-Ring, 90 S- ARP 0 9-000 Plug 0-8 Seal Piston 0-90 Cap 9-00 8 Spool 0-980 9 Orifice 0-89 Plug -000 Soc. Setscrew /- x -/ -80 Nut, Acorn 0- Plug 9-0099 8 Plug, / BSPP -000 0 O-ring, 0 S- ARP 008-00008 8

TORQUE LIMITER OVERRIDE TORQUE LIMITER OVERRIDE TEST AND ADJUSTMENT. Install gages on system pressure and on compensator vent ports.. Turn compensator adjustment screw out to remove spring load, then / turn in.. Turn differential adjustment screw out to remove spring load, then / turn in.. Back out maximum volume stop to full volume.. For setting and testing compensator override function, disable torque limiter in this manner: Back out primary adjusting screw () figure 8, to remove all load. Turn in outer adjusting screw (8) to go solid. Caution! do not apply over, Nm torque to avoid damage to internal parts!. Start prime mover with system relief set at bar.. Stroke pump to full displacement. Apply a load to the pump. 8. Increase system relief valve until compensator de-strokes pump to zero displacement. Set compensator to 0 bar. 9. Adjust compensator differential spool pressure to,8 bar. This is accomplished by adjusting the differential screw until the difference in pressure readings between the system pressure and compensator vent gages installed in the compensator cap is,8 bar. (It may be necessary to change differential to gain stability. Use caution when exceeding bar to avoid spring going solid, preventing compensator action.) When correct, lock in place and install cap.on differential adjustment. 0. Set the compensator to 0 bar, bar, and 00 bar. At each condition, increase the system pressure until the pump fully de-strokes. At no time should the system pressure vary more than 0, bar from the compensator setting. The control should be steady and stable at all conditions.. Reduce pressure to 0, bar below the compensator setting. Pump should return to full stroke. Repeat two or more times. Compensator setting should be repeatable.. Set compensator adjustment to at least, bar above the required setting, or 8 bar. Set the torque limiter by using the formula: kw = P Q/(Eff. 00) where P = pressure in Bar Q = flow in l/m calculate these two values: a. System pressure at full pump flow. b. Pump flow at full system pressure.. Set system relief valve to pressure (a) calculated above. Back out primary adjusting screw to remove all load. Set outer adjusting screw (8) so that pump just commences to de-stroke.. Set the system relief valve to the required maximum system pressure. Set primary adjusting screw () to obtain the calculated flow (b) at full system pressure.. Set compensator adjustment to the required setting, or bar if not otherwise noted. Note: Electric motor current may be used instead of calculated flows to set power. In step, set the outer adjusting screw (8) to achieve the rated motor current. In step, set the adjustment () to achieve the rated motor current. 9

COMPENSATOR OVERRIDE COMPENSATOR OVERRIDE DISASSEMBLY ASSEMBLY TEST AND ADJUSTMENT. See Figure 0. Remove tube line to cap.. Remove maximum volume stop assembly (items 0,,,, ).. Remove cap assembly.. Remove plug () and attached parts. Remove spring () and spool (8).. Remove adj. plug () and attached parts. Remove seal piston (). Note: a 0- screw may be attached to assist in pulling the piston. Remove spring () and cone (8).. Do not remove sleeve in body (). Sleeve is pressed into cap and finished to size. If sleeve, snout or cap is worn, replace the cap-sleeve assembly ().. Examine seat (0) for wear. Do not remove unless damaged.. Install Avseal plugs (9) in body. Install orifice (9) in body.. Press seat (0) into bore to shoulder in bore.. Install spool (8) into bore as shown. Install spring () over end of spool. Install O- ring () on seal piston (). Lubricate and install into plug (). Install O-ring () in bottom of bore as shown. Install O-ring () on plug (). Install plug () into cap. Install screw () and nut ().. Install O-ring () on seal piston ().. Lubricate O-ring and install cone (8), spring () and seal piston into bore in cap (), being careful that cone enters seat (0).. Install remaining parts. Torque plug () to 0 Nm. Torque plug () to Nm. Torque plug (8) to 0 Nm.. Note proper location for cap on pump. Install O-rings on interface between cap and pump control pad. 8. Install cap assembly on pump, guiding the control piston into the bore. 9. Torque mounting bolts to 0 Nm. 0. Install tube fitting and tube line connecting to opposite cap. Compensator is to be tested on pump. Adjust maximum volume stop to full displacement.. Install gages on system pressure and on compensator vent ports.. Turn compensator adjustment screw () CCW until there is no contact with spring, then adjust / turn CW after contact is made with spring.. Turn differential adjustment screw () CCW until there is no contact with spring, then adjust / turn CW after contact is made with spring.. Start prime mover with system relief valve set at bar. Apply a load to the pump.. Set pump control to full displacement. Pump should go to full displacement at bar.. Increase system relief valve until compensator de-strokes pump to zero displacement. Set compensator to 00 bar.. Adjust compensator differential spool pressure to,8 bar. This is accomplished by adjusting the differential screw until the difference in pressure readings between the system pressure and compensator vent gages installed in the compensator cap is,8 bar. (It may be necessary to change differential to gain stability. Use caution when exceeding bar to avoid spring going solid, preventing compensator action.) When correct, lock in place and install cap.on differential adjustment. 8. Set the compensator to 0 bar, bar, and 00 bar. 9. At each condition, increase the system pressure until the pump fully de-strokes. At no time should the system pressure vary more than 0, bar from the compensator setting. The control should be steady and stable at all conditions. 0. Reduce pressure to 0, bar below the compensator setting. Pump should return to full stroke. Repeat two or more times. Compensator setting should be repeatable.. Set compensator adjustment to the required setting, or bar if not otherwise noted. 0

COMPENSATOR OVERRIDE differential Adjustment compensator adjustment vent conn. /8 BSPP torque Nm torque 8 Nm cylinder pressure / BSPP torque 0 Nm PARTS LIST FOR FIGURE 0 compensator override control S- system pressure / BSPP TORQUE 0 Nm FIGURE 0 COMPENSATOR OVERRIDE CONTROL ITEM DESCRIPTION PART NO. QTY. Cap-Sleeve Assembly S- Adj. Plug 0-98 Soc. Setscrew /- x -0 Nut, /- -00 Seal Piston 0-9 0-Ring, 90 S- ARP 0 9-000 Spring 0-998 8 Cone 0-88 9 Avseal Plug -000 0 Seat 0-9 Spring 0-08 Plug, / BSPP -0008 O-Ring, 90 S- ARP 90 9-0090 O-Ring, 90 S- ARP 0 9-000 Plug 0-8 Seal Piston 0-90 Cap 9-00 8 Spool 0-980 9 Orifice 0-8 0 Nut, M 0-98 Plug 88-08 O-ring, 90 S- ARP 908 9-00908 O-ring, 0 S- ARP -00 Soc.setscrew -000 Soc. Setscrew /- x -/ -80 Acorn Nut 0- Plug 9-0099 8 Plug, BSPP / -000 Plug, BSPP /8-000

HYDRAULIC STROKER NOT SHOWN CCW ROTATION NOT SHOWN H0 HJ, HK HP CW ROTATION NOT SHOWN 8 9 0 HYDRAULIC STROKER parts list P080 QUANTITY ITEM DESCRIPTION PART NO. H0 HJ HK HP Hydraulic Stroker (Fig. ) S- Control Cap (Fig. ) S- Low Torque Override (Fig. 8) S- High Torque Override S- Comp. Override (Fig. 0) S- * O-Ring, 90 S- ARP 9-00 * Elbow 9-09 * Tube, CW 0-90 Tube, CCW 0-9 ** Screw-H.H.C., M x mm -0 ** Screw-H.H.C., M x mm -0 8 Control Piston 0-98 9 O-Ring, 0 S- ARP 0-000 0 O-Ring, 0 S- ARP -00 Piston Ring 0-98 Piston Ring 0-98 *Tubing assembly including items,, and are available as S-0 (CW), S-0 (CCW) **Included with items,

HYDRAULIC STROKER HYDRAULIC STROKER DISASSEMBLY ASSEMBLY TEST AND ADJUSTMENT. See figure. Remove screws holding body () to cap assembly ().. Remove all parts from body () except pin (0) and arm assembly (8). It is not necessary to remove these parts unless broken or worn. Examine parts for wear or damage.. Remove screw (). Examine head for excessive wear, and body for smooth sealing surface with O-ring.. See figure. Remove tube lines to cap assembly.. Remove screws holding cap assembly to pump body.. Remove cap assembly (). Remove plug () with attached parts. Remove spring () and spool ().. Do not remove sleeve in body (). Sleeve is pressed into cap and finished to size. If sleeve or cap is worn, replace the cap-sleeve assembly (). 8. Remove screw () and nut (). Remove the retainer ().. See figure. Install Avseal plug (9) in cap.. Install spool () into bore as shown. Install spring () over end of spool.. Install O-ring (8) on spring retainer (). Install retainer (), screw (), and nut () in plug ().. Install O-ring () in bottom of bore as shown. Install O-ring (0) on plug (). Install plugs () and () in body (). Torque plugs to 0 Nm. Install O-ring (8) in cap.. Turn screw () in until spring retainer () contacts spring (). Turn an additional -/ turns and lock in position.. Note proper location for control on pump. Install O-rings on interface between cap and pump control pad. Install cap on pump control pad, guiding the control piston into the bore.. Torque two assembly bolts to 0 Nm. 8. See figure. Apply Loctite on threads of screw (), lubricate the shank, thread through the cap into the control piston, and torque to,8 Nm. 9. Install minimum stop screw () and turn clockwise to stroke pump to full volume. Measure height from control cap to top of screw (). With control piston at full stroke, dimension must be 9, +/- 0, mm. Back out minimum stop screw () till there is no contact with control piston. 0. Press dowel (0) into body (), through the link (8), to, mm below surface. Apply Loctite hydraulic sealant to threads of screws (0) and install over dowel (0).. Press spool () into retainer (9). Caution: do not use excessive force. Place spool/ retainer assembly into spool () with spring (8) and washer (). Secure with retaining ring ().. While sleeve () is engaged into dowel on link (8), slide above spool assembly into bore of body (), and through sleeve (). Spool () must move freely and easily at all positions of the link (8).. Assemble all other components into body () per figure. Torque plug () to 8 Nm.. While spring retainer is engaging clevis pin () under dowel of link (8), slide the other opening of spring retainer over the top of the screw (). Attach body assembly () to cap () with two screws and torque to 0 Nm.. Plumb 8,8 bar servo supply to control.. Thread zero screw () so that pump is on stroke.. Start pump.. Supply 0 bar to hydraulic stroker control port.. Adjust screw (9) until output flow is at the full stroke position. Lock in place.. Reduce control pressure to 0 bar. Back out zero screw () until pump is at zero stroke. Lock in place.. Increase and decrease control pressure between 0 and 0 bar several times at approximately, bar, 0 bar, and bar system pressure. Pump stroke should follow control pressure smoothly and proportionally. Full to zero or zero to full stroke should be achieved in no more than. second. Full stroke should be achieved at, bar. Zero stroke should be achieved at, +/- bar. Adjust control pressure up to bar from zero stroke, then adjust down from full stroke to bar. The flows at the two settings shall not vary more than 0 l/m from each other. When all adjustments are correct, lock in place and install cap.on differential adjustment.

HYDRAULIC STROKER CONTROL SIGNAL INLET / BSPP LOCTITE TORQUE,8 Nm TORQUE 0 Nm LOCTITE CYL. PRESS. / BSPP TORQUE 8 Nm TORQUE 0 Nm SERVO SUPPLY /8 BSPP FIGURE HYDRAULIC STROKER PARTS LIST FOR FIGURE hydraulic stroker S- ITEM DESCRIPTION PART NO. QTY. Cap (Figure ) S-9 Screw 0-9 Clevis pin -0000 Spring, Compression 0-900 Plug, Avseal -000 8 Nut, /- -00 9 Soc. Setscrew, /- x -/ -80 0 Seal Piston 0-998 O-Ring, 90 S- ARP 0 9-000 Plug, 8 HPN-S 88-08 Spring Cap 0-9 Spring -90 Body S-9 Spool 0-9 8 Spring -909 9 Spring Retainer 0-9 0 Nut, M 0-98 Spool 0-98 O-Ring,0 S- ARP -00 Soc. Setscrew, M - x 80 mm -000 Plug, HPN-S 88-0 O-Ring, 90 S- ARP 9 9-009 Sleeve 0-9 8 Arm assembly S-0 9 O-Ring, 0 S- ARP 0-000 0 Dowel Pin, /8 Dia x.0 Lg. -08 Ret. Ring -00 Washer 0-9 O-Ring, 0 S- ARP 0-000 Plate 0-90 Screw, HHC,/-0 x / 0-0 8 Adapter 0-90 9 O-Ring, 90 S- ARP 908 9-00908 0 Screw, SHC 0- x / -090 O-ring, 90 S- ARP 90 9-0090 O-ring, 0 S- ARP 00-0000 8 Seal 9-000

TORQUE LIMITER NOT SHOWN CCW ROTATION CW ROTATION NOT SHOWN J/K0 J/K0 ITEMS 8 9 NOT SHOWN PARTS LIST torque limiter TORQUE LIMITER P080 QUANTITY ITEM DESCRIPTION PART NO. J0 K0 J0 K0 Max. Vol. Stop (Fig. ) S- Max Vol. Handwheel (Fig. ) S-8 * Low Torque Limiter (Fig. ) S- High Torque Limiter S- Low Torque Limiter S- High Torque Limiter S- Buck Up Cap (Fig. ) S- Screw-H.H.C., M x mm -0 Screw-H.H.C., M x mm -0 Control Piston 0-98 O-Ring, 0 S- ARP 0-000 8 O-Ring, 0 S- ARP -00 9 Piston ring 0-98 *Includes items,,

TORQUE LIMITER TORQUE LIMITER DISASSEMBLY ASSEMBLY. See Figure. Remove screws holding torque limiter body () to cap assembly ().. Remove all parts from torque limiter body () except pin (0) and arm assembly (8). It is not necessary to remove these parts unless broken or worn. Examine parts for wear or damage.. Remove screw (). Examine head for excessive wear, and body for smooth sealing surface with O-ring.. Remove maximum stop handwheel assembly or maximum stop screw assembly.. Remove cap assembly ().. See Figure Remove plug () and attached parts. Remove spring () and spool (8).. Remove adjusting plug () and attached parts. Remove spring () and cone (8). 8. Do not remove sleeve in body (). Sleeve is pressed into cap and finished to size. If sleeve or cap is worn, replace the cap-sleeve assembly (). 9. Examine seat (0) for wear. Do not remove unless damaged.. See Figure Install Avseal plugs (9) and orifice (9) in body.. Press seat (0) into bore squarely against shoulder in bore.. Install spool (8) into bore as shown. Install spring () over end of spool. Install O- ring () on seal piston (). Lubricate and install into plug (). Install O-ring () in bottom of bore as shown. Install O-ring () on plug (). Install plug () into cap. Install screw () and nut (). Install plug (). Torque plugs () and () to 0 Nm. Install plug (). Torque to Nm. Install plug (8). Torque to 0 Nm.. Install O-ring () on seal piston (). Lubricate O-ring and Install cone (8), spring () and seal piston () into bore in cap (), being careful that cone enters seat (0). Install adj. plug (), screw (), nut () and acorn nut ().. Carefully install O-ring () in the cap.. Note proper location for control cap. Install O-rings on interface between cap and pump control pad. Install cap, guiding control piston into bore.. Install maximum volume handwheel or screw assembly. Set stop to clear control piston. Install two mounting screws and torque to 0 Nm. 8. See Figure. Apply Loctite on threads of screw (), lubricate the shank, thread through the cap into the control piston, and torque to,8 Nm 9. Measure height from control cap to top of screw. With control piston at full stroke, dimension must be 8, +/-. mm. 0. Press dowel (0) into body (), through the link assembly (8), to, mm below surface. Apply Loctite hydraulic sealant to threads of screws () and install over dowel (0).. While sleeve () is engaged into dowel on link (8), slide spool () into bore of body (), and through sleeve (). Spool () must move freely and easily at all positions of the link (8).. Assemble remaining parts per drawing. While spring retainer is engaging clevis pin () under dowel of link (8), slide the other opening of spring retainer over the top of the screw (). Attach body assembly () to cap () and torque screws to 0 Nm.