DENISON HYDRAULICS Premier Series open circuit pump controls P6 B-mod, P0 A-mod service information Publ. S-AM06-A replaces S-AM06 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 5, electric stroker-------------------------------------------------------------------------- figure 6, servo cap--------------------------------------------------------------------------------- parts lists for figure 5 and figure 6------------------------------------------------------------- control cap disassembly, assembly------------------------------------------------------------- figure & parts list, control cap---------------------------------------------------------------- torque limiter override disassembly & assembly--------------------------------------------- figure 8 & parts list, torque limiter override-------------------------------------------------- figure & 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 5 & 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-------------------------------------------------------------------------------- fluid connections------------------------------------------------------------------------------------- installation drawings-------------------------------------------------------------------------------- controls key sheet------------------------------------------------------------------------------------ technical data conversions------------------------------------------------------------------------- Pump seal kit (includes all controls) P0, S-508 P6, S-80 See key sheet pg. 8 for information Note: Changes too extensive to identify separately PAGE 5 5 5 6 8 0 0 5 5 6 8 0 5 6 8 0 5 6 6 6 6 8 8 8 0 0 8
CHARACTERISTICS TYPICAL CHARACTERISTICS Specification compensator response off-stroke on-stroke (per SAE J5 Apr. 8 at 5000 psi, 5 bar) compensator adjustment minimum compensating pressure (comp, load sensing, torque limiter) minimum comp. override pressure at 00 psi, 8 bar servo pr. (servo, elec. & hyd. str. ) Term sec. sec. psi/turn bar/turn psi bar psi bar P0 0.00* 0.0* 000 8 00**,6** 50** 86** P6 0.00* 0,50* 000 8 00**,6** 50**,** torque limiter adjustment range code J code K in-lbs Nm in-lbs Nm 00-00 60-50 over 00 over 50 500-6000 8-06 over 6000 over 06 typ. servo & stroker response @ 00 psi, 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. in /min. l/min. in /min. l/min psi bar degrees in /rev/deg. cc/rev/deg. in-lbs Nm <0. 6., 5, 500 0 6 0.,0 0, <0. 6, 5, 500 0 80 0.0,5 0, hydraulic stroker control pressure 0 disp. full disp. psi bar psi bar 50,5 0 6 50,5 5 electric stroker control current (V) electric stroker control current (V) 0 disp. full disp. 0 disp. full disp. pulse width modulation frequency: mating connector: Din 650 type AF part no. 6-0008-8 (provided) electric stroker nominal coil resistance (v.) electric stroker nominal coil resistance (v.) ma ma ma ma Hz ohms ohms 5 5 50 60 00-50 0 5 5 50 60 00-50 0 handwheel turns, full to zero stroke torque to turn handwheel @ 000 psi, 0 bar torque to turn handwheel @ 50 psi, 500 bar turns in-lbs Nm in-lbs Nm 8. 5 5 5 0. 50 50 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) SAE SAE SAE SAE SAE SAE - - - - -8-6 - - - - -8-6 * on-stroke response for compensator override is determined by servo/stroker response **add case pressure
INTRODUCTION GENERAL DESCRIPTION OF OPERATION PRESSURE COMPENSATOR COMPENSATOR WITH LOAD SENSING CONFIGURATION LOAD SENSING CONTROL TORQUE LIMITER ROTARY SERVO CONTROL 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, and limits pilot flow to approximately 5 in /min.,, L/m. 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 pston connected to system pressure, pump timing forces, and a spring 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 00 psi,,6 bar difference, the spool shifts toward the spring, re-directing the control piston 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 00 psi,,6 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. For load sensing, this V port is connected to the load. The pump compensator will supply approximately 00 psi,,6 bar above the load pressure. The valve between the pump and the load meters the flow, The pump provides the flow to develop 00 psi,,6 bar drop across the valve independent of the load pressure and thus becomes a flow control independent of operating pressure. Adjustment of spring load on the three-way spool allows precise control of the differential pressure. Where the approximately 5 in /rev.,, L/m vent flow cannot be accommodated by the load sensing circuit, 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 00 psi, 0, bar above load pressure. There is essentially no flow in the sensing line. For torque limiting, system pressure and pump displacement are controlled 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 spool and pin act as a metering valve. 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, which is ported 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, high flow, 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. The rotary servo control is mounted on the off-stroke side of the control cylinder. 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 described above 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 the above pin. A control pressure of 50 psi,,5 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
INTRODUCTION pump to stroke in proportion to control pressure. Full stroke is achieved at 0 psi, 6 bar, (P0), and 5 psi, bar (P6). ELECTRIC STROKER 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 5 ma electrical signal, the pump commences to stroke, and at approximately 5 ma, (P0) and 5 ma, (P6), the pump will be at full stroke. PRESSURE COMPENSATOR AND TORQUE LIMITER OVERRIDE An override pressure compensator or a torque limiter control mounts on the smaller diameter of the control piston, opposite the servo, hydraulic or electric stroker. In the normal position, the spool in the override control connects this piston to servo pressure, allowing control by the stroker. When system pressure or torque exceed the override setting, this spool connects system pressure to the smaller diameter control piston, to override the command and reduce stroke according 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 5
PRESSURE COMPENSATOR CCW ROTATION CW ROTATION C0 C0 ITEMS 6 8 NOT SHOWN PRESSURE COMPENSATOR parts list P0 P6 QTY. ITEM DESCRIPTION PART NO. PART NO. C0 C0 Max. Vol. Stop (Fig. ) S-8 S-8 Max Vol. Handwheel (Fig. ) S-5 S-5 Compensator Control (Fig. ) S-5 S-5 Buck Up Cap (Fig. ) S-565 S-0 Screw-H.H.C.,M x 60 mm 6-0 6-0 8 6 5 Screw-H.H.C., M x 80 mm 6-5 6-5 6 Control Piston 0-585 0- O-Ring, 0 S- ARP 0 6-000 6-000 8 O-Ring, 0 S- ARP 5 6-005 6-005 Piston Ring 0-6 0-6 6
PRESSURE COMPENSATOR PARTS LIST FOR FIGURE, MAX. VOL. STOP S-8 ITEM DESCRIPTION PART NO. QTY. Plug 0HP5N-S 88-5055 O-Ring, 0 S- ARP 0 6-000 Nut, / -0UNC Hex 0-0 Screw, Soc. Set / 0 x -60 5 O-Ring,0 S- ARP 8 6-008 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 (5) and handwheel () from the stop screw ().. Remove nut (). Screw () may now be slipped through the bracket () to examine parts and to replace O-ring (6). 5. Seat (0) rotates and pivots on ball (8), and is retained by pressing two balls () into screw (). Replace assembly if damaged. ASSEMBLY. Install ball (8) and seat (0) in screw ().. Press balls () into screw () to retain seat.. Install O-ring (6) 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. 5. Install and Torque the assembly screws to 5 lbs. ft., 0 N m FIGURE HANDWHEEL MAXIMUM VOLUME STOP PARTS LIST FOR FIGURE, HANDWHEEL S-5 ITEM DESCRIPTION PART NO. QTY. Bracket 0-56 Screw 0-55 Nut, Hex /-6 UNC -5000 Handwheel 0-5 5 Nut, Elastic Stop /- -000 6 O-Ring, 0 S- ARP 5 6-005 O-Ring, 0 S- ARP-8 6-008 8 Ball 0-600 Ball 0-000 0 Seat 0-5
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 (5) and attached parts. Remove spring () and spool (8).. Remove adjusting plug () and attached parts. Remove seal piston (5). Note: a 0- screw may be used to assist in pulling the piston. Remove spring () and cone (8). 5. 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 (). 6. Examine seat (0) for wear. Do not remove unless damaged.. Install Avseal plugs () and orifice () 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 (6) on seal (6). Lubricate and install into plug (5). Install plug (5) into cap. Install screw (), nut () and acorn nut ().. Install O-ring (6) on seal piston (5). 5. 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 5 lb. ft., 0 Nm. Torque plug () to 6 lb. ft., 6 Nm. 6. 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 5 lbs. ft., 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 (5) 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 500 PSI, 5 bar. If testing on application, apply a load to pump. 5. Start prime mover. Pump should be at full displacement at 500 PSI, 5 bar. 6. Increase system relief valve until compensator de-strokes pump to zero displacement. Set compensator to 500 PSI, 0 bar.. Adjust compensator differential spool pressure to 00 PSI,,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 00 PSI,,8 bar. (It may be necessary to change differential to gain stability. Use caution when exceeding 50 PSI, bar to avoid spring going solid, preventing compensator action.) 8. Set the compensator to 000 PSI, 0 bar, 6000 PSI, bar, and 50 PSI, 500 bar.. At each condition, increase the system pressure until the pump fully de-strokes. At no time should the system pressure vary more than 50 PSI, 0, bar from the compensator setting. The control should be steady and stable at all conditions. 0. Reduce pressure to 50 PSI, 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 6000 PSI, Bar if not otherwise noted. Install cap () on differential adjustment. 8
PRESSURE COMPENSATOR COMPENSATOR ADJUSTMENT 6 5 5 6 8 FIGURE COMPENSATOR 0 5 6 6 DIFFERENTIAL ADJUSTMENT 8 VENT CONN. V SAE-8 ST. THD. TORQUE 6 FT-LB, 6 Nm 8 PORT C, SAE- ST. THD TORQUE FT-LB, 5 Nm SYSTEM PRESS. SAE-0 ST. THD TORQUE 5 FT-LB, 0 Nm PARTS LIST FOR FIGURE compensator S-5 ITEM DESCRIPTION PART NO. QTY. Cap-Sleeve Assembly S-880 Adj. Plug 0-8 Soc. Setscrew 5/6- x -60 Nut, 5/6-5-00 5 Seal Piston 0-56 6 O-Ring, 0 S- ARP 0 6-000 Spring 0-8 8 Cone 06-88 Avseal Plug -0006 0 Seat 06-6 Spring 0-086 Plug, SAE-0 88-5055 O-Ring, 0 S- ARP 0 6-000 O-Ring, 0 S- ARP 0 6-000 5 Plug 0-568 6 Seal Piston 0-05 Cap -006 8 Spool 0-58 Orifice Plug 0-558 Plug, SAE -8 88-508 O-Ring, 0 S- ARP 08 6-0008 5 Soc. Setscrew 5/6- x -/ -80 6 Acorn Nut 06-8 Plug, SAE - 88-506 O-Ring, 0 S- ARP 0 6-000
PRESSURE COMPENSATOR a FIGURE BUCK-UP CAP b TORQUE 5 LB-FT 05 Nm 6 5 TORQUE 0 LB-FT 0 Nm BUCK-UP CAP DISASSEMBLY P0 P6. 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(s) () and piston (). If sleeve () is worn, press it out and replace. ASSEMBLY PARTS LIST FOR FIGURE P0 buck-up cap S-565 P6 buck-up cap S-0. Install Avseal plug () into cap. Press sleeve () into cap to shoulder. Install piston (), O-ring (5) and plug (6) into cap.. Install O-rings on interface between cap and pump control pad. Install spring (a) and spring (b) (in P0 only) into control piston. Install cap assembly on pump housing as indicated on the applicable view, guiding the control piston into the bore.. Torque the assembly bolts to 5 ft-lb, 0 Nm. Torque plug (6) to value indicated on fig.. P0 P6 ITEM DESCRIPTION PART NO. QTY. PART NO. QTY. Piston -68-08 a Spring 0-0- b Spring (P0 only) 0-6 Sleeve 0-0- Control Cap 0-8 0-66 5 O-Ring 6-000 6-006 6 Plug 88-50 88-50 Avseal Plug -0006-0006 0
ELECTRIC STROKER 8 5 6 5 6 8 5 6 8 NOT SHOWN CCW ROTATION 5 6 5 6 5 6 8 8 NOT SHOWN 8 0 NOT SHOWN E0 EJ EK CW ROTATION EP ELECTRIC STROKER parts list P0 P6 QUANTITY ITEM DESCRIPTION PART NO. PART NO. E0 EJ EK EP Electric Stroker (Fig. 5) S-505 S-505 Control Cap (Fig. ) S-556 S-556 Low Torque Override (Fig. 8) S-5 S-55 High Torque Override (Fig. 8) S-55 S-55 Comp. Override (Fig. 0) S-550 S-550 O-Ring, 0 S- ARP 06 6-0006 6-0006 Elbow -50-50 5 Elbow 8-00050 8-00050 6 5 0 Swivel Nut Ell -50-50 Tube 0-88 0-8 8 Screw-H.H.C., M x 60 mm 6-0 6-0 6 6 Screw-H.H.C., M x 80 mm 6-5 6-5 0 Control Piston 0-88 0-85 O-Ring, 0 S- ARP 0 6-000 6-000 O-Ring, 0 S- ARP 5 6-005 6-005 Piston Ring 0-6 0-6 Piston Ring 0-8 0-8
ELECTRIC STROKER ELECTRIC STROKER DISASSEMBLY. See Figure 5. Remove screws () holding block (6) to body (6).. Remove screws holding body (6) to cap assembly ().. Remove all parts from body (6) 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. 5. See Figure 6. Remove tube lines to cap assembly. ASSEMBLY TEST AND ADJUSTMENT 6. Remove screws holding cap assembly to pump body.. Remove cap assembly (). Remove plug () with attached parts. Remove spring (8) 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 ().. Remove screw () and nut (5). Push a rod through the cap to remove the retainer ().. See Figure 6. Install Avseal plug (6) in cap.. Install spool () into bore as shown. Install spring (8) over end of spool.. Install O-ring () on spring retainer (). Install retainer (), screw (), and nut (5) in plug ().. Install O-rings () and (6) on plug (). Install plugs () and () in body (). Torque plugs to 5 lb. ft., 0 N m. Install O-ring (8) in cap. 5. Turn screw (5) in until spring retainer () contacts spring (8). Turn an additional -/ turns and lock in position. 6. 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 5 lb. ft., 0 N m. 8. See Figure 5. Apply Loctite on threads of screw (), lubricate the shank, thread through the cap into the control piston, and torque to 5 lb. ft., 6.8 N m.. 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 for the P6 must be.5 +/-.0 in.,, +/- 0,6 mm, dimension for the P0 must be.655 +/-.0 in., 6,6 +/- 0,6 mm. Back out minimum stop screw () till there is no contact with control piston. 0. Press dowel (0) into body (6), through the link (8), to /, 6,5 mm below surface, apply Loctite hydraulic sealant to threads of screws (6) and install over dowel (0).. Press spool () into retainer (). 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 (6), and through sleeve (). Spool () must move freely and easily at all positions of the link (8).. Install proportional valve () in block. Torque to 0 ft. lbs., N m.. Install coil on proportional valve. Torque to 0-5 in. lbs.,,-,8 N m max. 5. Assemble all other components into body (6) per above drawing. Torque the plug () to 5 lb. ft., 0 N m. 6. While spring retainer is engaging clevis pin (5) under dowel of link (8), slide the other opening of spring retainer over the top of the screw (). Attach body assembly (6) to cap () with two screws and torque to 5 lb. ft., 0 N m.. Plumb 00 PSI, 8,8 bar servo supply to control. Supply 00 PSI, 8,8 bar to the electric stroker servo supply port. Note: All pressure references are above case pressure (5 psi,, bar max.).. Thread zero screw () so that pump is on stroke.. Place a gage in the proportional valve gage port.. Start pump.
ELECTRIC STROKER 5. Adjust amperage (00-50 ma) to give 50 PSI,,5 bar reading on the proportional valve gage port. Back out zero screw () and adjust screw () until output flow is at zero stroke position. Lock both adjustments in place. 6. Increase amperage to 5 ma for the P0, 5 ma for the P6. 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 5 psi, 6 bar for the P0, 5 psi, bar for the P6.. 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 (5 figure 6) out to go towards full or in to go towards zero flow. 8. Increase and decrease the amperage between 0 and 5 ma several times at approximately 500 PSI,,5 bar, 000 PSI, 0 bar and 6000 PSI, bar system pressure. Pump stroke should follow amperage smoothly and proportionally. Full to zero or zero to full stroke should be achieved in. second. Adjust amperage up to 5 ma from zero stroke, then adjust down from full stroke to 5 ma. The flows at the two 5 ma settings shall not vary more than 5 gpm, 8, L /m from each other. PORT E SAE- STR THD. SERVO INLET TO PROP. VALVE ADJUST FOR ZERO FLOW AT 5 ma ELECTRICAL COMMAND PROPORTIONAL VALVE GAGE PORT, SAE- STR THD. PORT X SAE-6 STR THD. SERVO INLET TORQUE 5 LB FT 0 Nm TORQUE 5 FT-LB, 6,8 Nm LOCTITE FIGURE 5 ELECTRIC STROKER TORQUE 5 FT-LB, 0 Nm SERVO PRESSURE TO OPPOSITE SIDE SAE-6 STR. THD. DIFFERENTIAL ADJUSTMENT PORT C, SAE- ST. THD TORQUE FT-LB, 5 Nm FIGURE 6 SERVO CAP
ELECTRIC STROKER PARTS LIST FOR FIGURE 5 electric stroker S-505 ITEM DESCRIPTION PART NO. QTY. Cap (Figure 6) S-56 Orifice 0- Screw 0-6 O-Ring, 0 S- ARP 00 6-0000 5 Clevis pin -0000 6 Spring, Compression 0-00 Plug, Avseal -0006 8 Nut, 5/6-5-00 Soc. Setscrew, 5/6- x -/ -80 0 Seal Piston 0-8 O-Ring, 0 S- ARP 0 6-000 Plug, 0HP5N-S 88-5055 O-Ring, 0 S- ARP 0 6-000 Spring Cap 0-5 5 Spring 5-0 6 Body S-5 Spool 0-5 8 Spring 5-0 Spring Retainer 0-56 0 Nut, /-0 0-0 Spool 0-8 O-Ring,0 S- ARP 8 6-008 Soc. Setscrew, /-0 x -60 5 Plug, HP5N-S 88-50 6 O-Ring, 0 S- ARP 6-00 Sleeve 0-8 Arm assembly S-550 O-Ring, 0 S- ARP 05 6-0005 0 Dowel Pin, /8 Dia x.5 Lg. -088 Ret. Ring 56-00 Washer 0-5 5 O-Ring, 0 S- ARP 0 6-000 6 Block 0-50 Screw, /-0 x -/ 06-08 8 Plug, aluminum, /6-0 -000 O-Ring, 0 S- ARP 08 6-0008 Prop. Pr. Cont. Valve 5-0005 Coil, VDC 5-0006 Coil, VDC 5-000 Connector 6-0008-8 O-Ring, 0 S- ARP 0 6-000 5 Plug, SAE- 88-506 6 Screw, SHC 0- x / -00 PARTS LIST FOR FIGURE 6 servo cap S-56 ITEM DESCRIPTION PART NO. QTY. Cap/Sleeve S-560 Plug -0005 Plug 0-86 Spool 0-58 5 O-Ring, 0 S- ARP 008 6-00008 6 Avseal Plug -0006 O-Ring, 0 S- ARP 0 6-000 8 Spring 0-86 Plug, SAE -0 88-5055 0 Plug, SAE - 88-506 O-ring, 0 S- ARP 0 6-000 Spring retainer 0-86 O-Ring, 0 S- ARP 0 6-000 Screw, 5/6 - x -60 5 Nut, 5/6-5-00 6 O-Ring, 0 S- ARP 0 6-000 Cap -006
ELECTRIC STROKER CONTROL CAP DISASSEMBLY ASSEMBLY. See Figure. Remove cover (5) 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 5 lb. ft., 0 Nm.. Install screw () in cap. Install O-ring () on nut (5). Install nut (5) on screw.. Adjust screw till pump is slightly on stroke and lock nut (5).. Install O-ring () on plug (6). Install plug in nut (5). Torque plug (6) to 6 lb. ft., 6 Nm. FIGURE CONTROL CAP ASSEMBLY PARTS LIST FOR FIGURE control cap assembly S-556 ITEM DESCRIPTION PART NO. QTY. Control Cap 0-6 Plug -0005 O-ring, 0 S- ARP 8 6-008 Screw, /-0 x -60 5 Nut 0-0 6 Plug 88-5055 O-ring 0 S- ARP 0 6-000 5
TORQUE LIMITER OVERRIDE TORQUE LIMITER OVERRIDE DISASSEMBLY ASSEMBLY. See figure 8. Remove screws holding torque limiter body (6) to cap assembly ().. Remove all parts from torque limiter body (6) 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 maximum volume stop assembly (items, 0,,, ). 5. Remove cap assembly (). 6. Remove plug (5) and attached parts. Remove spring () and spool (8).. Remove adjusting plug () and attached parts. Remove seal piston (5). 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 ().. Examine seat (0) for wear. Do not remove unless damaged.. See figure. Install Avseal plugs () and orifice ().. 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 (6) on seal (6). Lubricate and install into plug (5). Install O-rings () and () on plug (5) Install plug (5) into cap. Install screw (), nut () and acorn nut ().. Install O-ring (6) on seal piston (5). 5. 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 (5), nut (), and acorn nut (5). 6. Install plug () and torque to 5 lb. ft., 0 Nm. Install plug (). Torque to 6 lb. ft., 6 Nm.. Carefully install O-ring () 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 5 lb. ft., 0 Nm.. Install maximum stop screw (0), cover (),O-ring (0) and plug () with O-ring (). 0. See figure 8. Apply Loctite on threads of screw (), lubricate the shank, thread through the cap into the control piston, and torque to 5 lb. ft., 6,8 Nm.. Measure height from control cap to top of screw. With control piston at zero stroke, dimension for the P6 must be.5 +/-.0 in.,, +/- 0,6 mm, dimension for the P0 must be..655 +/-.0 in., 6,6 +/- 0,6 mm.. Press dowel (0) into body (6), through the link assembly (8), to /, 6,5 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 (6), and through sleeve (). Spool () must move freely and easily at all positions of the link (8).. Assemble remaining parts per drawing. Torque plug () to 6 lb. ft., 6 Nm. 5. While spring retainer is engaging screw (5) under dowel of link (8), slide the other opening of spring retainer over the top of the screw (). Attach body assembly (6) to cap () and torque assembly screws to 5 lb. ft., 0 Nm. 6
TORQUE LIMITER OVERRIDE TORQUE 5 LB FT 0 Nm HIGH FLOW PRESSURE ADJUST. LOCTITE TORQUE 5 LB. FT. 6,8 Nm TORQUE 6 LB FT 6 Nm HIGH PRESSURE FLOW ADJUST. FIGURE 8 TORQUE LIMITER OVERRIDE PARTS LIST FOR FIGURE 8 torque limiter override P0 code J S-5 P0 code K S-55 P6 code J S-55 P6 code K S-55 P0 P6 QTY. ITEM DESCRIPTION PART NO. PART NO. **J **K Cap (Figure ) S-5 S-5 Screw 0-6 0-6 5 Clevis pin -0000-0000 6 Spring, Compression 0-00 0-00 Plug, Avseal -0006-0006 8 Screw 0-5 0-5 Nut, Hex Jam /-0 UNC 0-0008 0-0008 0 Hex Nut, /-6 UNF 0-0- Plug, 8HP N-S 88-508 88-508 O-Ring, 0 S- ARP 08 6-0008 6-0008 5 Screw, Primary Adjust 0-6 0-6 6 Body assembly S-5 S-5 Outer Spring J Version 0-0 0-0 Outer Spring K Version 0-0 0-8 8 Inner Spring J Version 0-0 0- Inner Spring K Version 0-0- Spring Retainer 0-8 0-8 Spool 0-8 0-8 O-ring, 0 S- ARP 8 6-008 6-008 5 Plug, HP5N-S 88-50 88-50 6 O-Ring, 0 S- ARP 6-00 6-00 Sleeve 0-0- 8 Arm assembly S-550 S-550 O-Ring, 0 S- ARP 05 6-0005 6-0005 0 Dowel Pin, /8 Dia. x.5 Lg.. -088-088 Screw, SHC 0- x / -00-00 Nut 0-65 0-65 5 O-Ring, 0 S- ARP 00 6-0000 6-0000
TORQUE LIMITER OVERRIDE SYSTEM PRESS. SAE-0 TORQUE 5 LB-FT, 0 Nm PORT C, SAE- ST. THD TORQUE FT-LB, 5 Nm SERVO PRESSURE FROM OPPOSITE SIDE SAE-6 STR. THD. COMP. ADJUSTMENT PARTS LIST FOR FIGURE, torque limiter override cap S-5 DIFFERENTIAL ADJUSTMENT VENT CONN. V SAE-8 ST. THD. TORQUE 6 FT-LB, 6 Nm FIGURE TORQUE LIMITER OVERRIDE CAP ITEM DESCRIPTION PART NO. QTY. Cap-Sleeve Assembly S-5 Adj. Plug 0-8 Soc. Setscrew 5/6- x -60 Nut, 5/6-5-00 5 Seal Piston 0-56 6 0-Ring, 0 S- ARP 0 6-000 Spring 0-8 8 Cone 06-88 Avseal Plug -0006 0 Seat 06-6 Spring 0-086 Plug, SAE -0 88-5055 O-Ring, 0 S- ARP 0 6-000 O-Ring, 0 S- ARP 0 6-000 5 Plug 0-568 6 Seal Piston 0-05 Cap -006 8 Spool 0-80 Cover 0-6 0 Screw, /-0 x -/ -5060 Plug, SAE -8 88-508 O-ring 0 S- ARP 08 6-0008 Soc. Setscrew 5/6- x -/ -80 O-Ring, 0 S- ARP 05 6-0005 5 Acorn Nut 06-6 Plug -0005 Plug, SAE - 88-506 8 O-ring, 0 S- ARP 0 6-000 Plug, SAE -5 88-500 0 O-Ring, 0 S- ARP 05 6-0005 O-Ring, 0 S- ARP 008 6-00008 Orifice 05-08 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. 5. For setting and testing compensator override function, disable torque limiter in this manner: Back out primary adjusting screw (5) to remove all load. Turn in outer adjusting screw (8) to go solid. Caution! do not apply over 0 lb. in.,, Nm torque to avoid damage to internal parts! 6. Start prime mover with system relief set at 500 PSI., 5 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 500 PSI, 0 bar.. Adjust compensator differential spool pressure to 00 PSI,,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 00 PSI,, bar. (It may be necessary to change differential to gain stability. Use caution when exceeding 50 PSI, 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 000 PSI, 0 bar, 6000 PSI, bar, and 50 PSI, 500 bar. At each condition, increase the system pressure until the pump fully de-strokes. At no time should the system pressure vary more than 50 PSI, 0, bar from the compensator setting. The control should be steady and stable at all conditions.. Reduce pressure to 50 PSI, 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 500 PSI,.5 bar above the required setting, or 000 PSI, 8 bar. Set the torque limiter by using the formula: HP=P Q / (Eff. ) where P = Pressure in PSI Q = flow in GPM Eff. = overall efficiency or kw = P Q/(Eff. 600) where P = pressure in Bar Q = flow in l/m Eff. = overall efficiency 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 (5) to obtain the calculated flow (b) at full system pressure. 5. Set compensator adjustment to the required setting, or 6000 PSI, 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 (5) to achieve the rated motor current.
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 (5) and attached parts. Remove spring () and spool (8). 5. Remove adj. plug () and attached parts. Remove seal piston (5). Note: a 0- screw may be attached to assist in pulling the piston. Remove spring () and cone (8). 6. 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 () in body. Install orifice () 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 (6) on seal (6). Lubricate and install into plug (5). Install O-rings () and () on plug (5). Install plug (5) into cap. Install screw (), nut () and acorn nut ().. Install O-ring (6) on seal piston (5). 5. Lubricate O-ring and install cone (8), spring () and seal piston into bore in cap (), being careful that cone enters seat (0). 6. Install remaining parts. Torque plug () to 5 lb. ft., 0 Nm. Torque plug () to 6 lb. ft., 6 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.. Torque mounting bolts to 5 lb. ft., 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 500 PSI, 5 bar. Apply a load to the pump. 5. Set pump control to full displacement. Pump should go to full displacement at 500 PSI, 5 bar. 6. Increase system relief valve until compensator de-strokes pump to zero displacement. Set compensator to 500 PSI, 0 bar.. Adjust compensator differential spool pressure to 00 PSI,,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 00 PSI,,8 bar. (It may be necessary to change differential to gain stability. Use caution when exceeding 50 PSI, 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 000 PSI, 0 bar, 6000 PSI, bar, and 50 PSI, 500 bar.. At each condition, increase the system pressure until the pump fully de-strokes. At no time should the system pressure vary more than 50 PSI, 0, bar from the compensator setting. The control should be steady and stable at all conditions. 0. Reduce pressure to 50 PSI, 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 6000 PSI, Bar if not otherwise noted. 0
COMPENSATOR OVERRIDE SYSTEM PRESS. SAE-0 ST. THD TORQUE 5 FT-LB, 0 Nm PORT C, SAE- ST. THD TORQUE FT-LB, 5 Nm TORQUE 5 FT-LB, 0 Nm COMP. ADJUSTMENT VENT CONN. V SAE-8 ST. THD. TORQUE 6 FT-LB, 6 Nm DIFFERENTIAL ADJUSTMENT FIGURE 0 COMPENSATOR OVERRIDE CONTROL PARTS LIST FOR FIGURE 0 compensator override control S-550 ITEM DESCRIPTION PART NO. QTY. Cap-Sleeve Assembly S-56 Adj. Plug 0-8 Soc. Setscrew 5/6- x -60 Nut, 5/6-5-00 5 Seal Piston 0-56 6 0-Ring, 0 S- ARP 0 6-000 Spring 0-8 8 Cone 06-88 Avseal Plug -0006 0 Seat 06-6 Spring 0-086 Plug, 0HP5N-S 88-5055 O-Ring, 0 S- ARP 0 6-000 O-Ring, 0 S- ARP 0 6-000 5 Plug 0-568 6 Seal piston 0-05 Cap -006 8 Spool 0-80 Cover 0-0 0 Screw, /-0 x -60 Plug, SAE -8 88-508 O-ring, 0 S- ARP 08 6-0008 Soc. Setscrew 5/6- x -/ -80 O-ring, 0 S- ARP 8 6-008 5 Acorn Nut 06-6 Plug -0005 Plug, SAE - 88-506 8 O-ring, 0 S- ARP 0 6-000 Orifice 05-08
HYDRAULIC STROKER 8 5 6 5 6 8 5 6 8 NOT SHOWN CCW ROTATION 5 6 5 6 5 6 8 8 NOT SHOWN 8 0 NOT SHOWN H0 HJ HK HP CW ROTATION HYDRAULIC STROKER parts list P0 P6 QUANTITY ITEM DESCRIPTION PART NO. PART NO. H0 HJ HK HP Hydraulic Stroker (Fig. ) S-50 S-50 Control Cap (Fig. ) S-556 S-556 Low Torque Override (Fig. 8) S-5 S-55 High Torque Override (Fig. 8) S-55 S-55 Comp. Override (Fig. 0) S-550 S-550 O-Ring, 0 S- ARP 06 6-0006 6-0006 Elbow -50-50 5 Elbow 8-00050 8-00050 6 5 0 Swivel Nut Ell -50-50 Tube 0-88 0-8 8 Screw-H.H.C., M x 60 mm 6-0 6-0 6 6 Screw-H.H.C., M x 80 mm 6-5 6-5 0 Control Piston 0-88 0-85 O-Ring, 0 S- ARP 0 6-000 6-000 O-Ring, 0 S- ARP 5 6-005 6-005 Piston Ring 0-6 0-6 Piston Ring 0-8 0-8
HYDRAULIC STROKER HYDRAULIC STROKER DISASSEMBLY ASSEMBLY TEST AND ADJUSTMENT. See figure. Remove screws holding body (6) to cap assembly ().. Remove all parts from body (6) 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 6. Remove tube lines to cap assembly. 5. Remove screws holding cap assembly to pump body. 6. 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 (5). Push a rod through the cap to remove the retainer ().. See figure 6. Install Avseal plug (6) in cap.. Install spool () into bore as shown. Install spring (8) over end of spool.. Install O-ring () on spring retainer (). Install retainer (), screw (), and nut (5) in plug ().. Install O-rings () and (6) on plug (). Install plugs () and () in body (). Torque plugs to 5 lb. ft., 0 N m. Install O-ring (5) in cap. 5. Turn screw () in until spring retainer () contacts spring (8). Turn an additional - / turns and lock in position. 6. 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 5 lb. ft., 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 5 lb. ft., 6,8 Nm.. 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 for the P6 must be.5 +/-.0 in.,, +/- 0,6 mm, dimension for the P0 must be.655 +/-.0 in., 6,6 +/- 0,6 mm. Back out minimum stop screw () till there is no contact with control piston. 0. Press dowel (0) into body (6), through the link (8), to /, 6,5 mm below surface. Apply Loctite hydraulic sealant to threads of screws (0) and install over dowel (0).. Press spool () into retainer (). 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 (6), and through sleeve (). Spool () must move freely and easily at all positions of the link (8).. Assemble all other components into body (6) per above drawing. Torque plug () to 5 lb. ft., 0 Nm.. While spring retainer is engaging clevis pin (5) under dowel of link (8), slide the other opening of spring retainer over the top of the screw (). Attach body assembly (6) to cap () with two screws and torque to 5 lb. ft., 0 Nm.. Plumb 00 PSI, 8,8 bar servo supply to control port X.. Supply signal pressure to hydraulic stroker control port H.. Thread zero screw () so that pump is on stroke.. Start pump. 6. Set signal pressure to 50 PSI,,5 bar. Back out zero screw () and adjust screw () until pump is at zero stroke. Lock both in place.. Slowly increase and decrease signal pressure between 0 and 5 PSI, bar several times at approximately 500 PSI,.5 bar, 000 PSI, 0 bar, and 6000 PSI, bar system pressure. Pump stroke should follow control pressure smoothly and proportionally. Rapidly adjust signal pressure between 0 and 5 PSI, bar Full to zero or zero to full stroke should be achieved in no more than 0, second. Full stroke should be achieved at 5 psi, 6 bar for the P0, and 5 psi, bar for the P6. Zero stroke should be achieved at 50 +/- 0 PSI,,5 +/-0, bar. Adjust signal pressure up to 5 PSI, bar from zero stroke, then adjust down from full stroke to 5 PSI, bar. The flows at the two settings shall not vary more than GPM, 5 L /m from each other. When all adjustments are correct, lock in place and install cap on differential adjustment. Note: Alll pressure references are above case pressure (5 psi,, bar max)