Commercial Vehicle Systems Product DATA Doc. No. Y075 (EN - Rev. 00) PD-500-000 Function On vehicles fitted with air suspension, the Levelling Valve ensures that the axle suspension air bags maintain a constant chassis height irrespective of the vehicle load. with the Height Limitation feature prevent the chassis height being manually raised above a set limit. with the Second Ride Height feature allow the driver to pneumatically signal the valve and raise the chassis to an alternative ride height. Cross Throttling prevents the rapid flow of air between the two outlet ports (left and right side of the vehicle). SV85 SV7 SV95 Technical Features Maximum Operating Pressure: bar Operating Temperature Range: -0 C to +80 C Weight: 0.7 kg approx. Lever length: 00 mm Lever design: Round, with rubber joint Standard Symbol as DIN ISO 9 SV95 SV78 SV65 SV85 Range Overview Part No. Type No. Replaces Second Ride Height (preset) Height Limitation (adjustable) Secondary Exhaust SV 07 II95 ) SV95 SV07 I996 ) SV8 SV8 II05 SV II90 SV7 7.5 II6 SV65 SV0, 6 0-50 ) with SV66 SV 6 II65 SV66 SV0, 6 0-50 ) with K585 ) SV78 SV60 SV 8 K00067 SV85 0 0-50 ) with K0067 5) SV85 0 0-50 ) with SV SV7 The rubber joint at the lower end of the vertical linkage is available separately: Part Number: K0006 ) Standard valve without additional features ) Without additional features, higher volumetric flow SV 6 ) Standard valve without additional features, carries N00 suffix ) Height Limitation adjustable, see adjustment instructions 5) Ports and are fitted with blanking plugs SV
PD-500-000 Product Data Doc. No. Y075 (EN - Rev. 00) Instructions for adjusting the height limitation (applies to the following levelling valves: SV6, SV6, SV6, SV65, SV66 and SV85) Levelling valves with Height Limitation shut off the air supply to the Raise/Lower valve at a certain angle of the lever and thereby limit the maximum chassis height. This angle is supplied pre-set to 5 but can be adjusted within the range 0 to 50. Note: If the adjustment range is not sufficient, the lever length can be changed (see pages and ). The adjustment is carried out as follows:. Pressurise ports and with minimum 6 bar. Pull off the protection cap from the adjustment screw. See Fig.. Raise the chassis with the Raise/Lower valve. See Fig.. Is the maximum permitted height being exceeded? no yes 5. Raise chassis until height limitation becomes active. See Fig. c. Turn the adjustment screw of the levelling valve with a mm Allen Key for half a turn anti-clockwise - see NOTE. See Fig. b. Lower the chassis several cm. See Fig. a. Immediately move Raise/Lower Valve to STOP position. See Fig. NOTE: Caution! Max. torque. Nm! Turning the screw by 60 is equivalent to approximately change of the lever angle 6. Leave Raise/Lower Valve in Raise -position 7. Turn adjustment screw with a mm Allen Key - see NOTE: clockwise to increase maximum chassis height counter-clockwise to decrease maximum chassis height 8. Re-check the adjusted height limitation by lowering the chassis and raising it again Fig. Protection Cap Push in for adjustment 9. Move Raise/Lower Valve lever back to driving position. See Fig. 0. Replace protection cap and ensure correct fitting. See Fig. ) For some part numbers the control logic is vice versa Fig. Lower ) Raise )
Commercial Vehicle Systems Doc. No. Y075 (EN - Rev. 00) PD-500-000 Second Ride Height and Height Limitation features: Calculation of the correct lever length When the Second Ride Height feature is activated, further angular travel of the lever is permitted and the chassis rises to a higher position; the increase in angle is a fixed value for each valve. If the lever length is changed, the second ride height can be further adjusted. The Height Limitation feature is adjusted using the integrated hexagon socket (see instructions on page ). For cases where the adjustment range is not sufficient, additional height can be achieved by increasing the lever length. The quotient of Lever Length and Height Limitation must be in the range. to.9. The following formulae for calculating the lever length will give an approximate value for the static condition. Type No. Second Ride Height (RH) Height Limitation (HL) SV65 L =.8 x RH. L HL.9. L HL.9. L HL.9 HL SV66 SV85 SV L = 5.8 x RH L =.8 x RH RH SV7 L =. x RH Example: Second Ride Height for SV85: RH (requested) = 0 mm HL (requested) = 00 mm L = 5.8 x 0mm = mm L = mm = HL 00 mm. When the angle of the height limitation is reached, the valve is in the following condition: connection closed connection closed secondary exhaust for open RH RH...9 Type No. SV SV7 SV65 SV66 SV85 Second Ride Height [α] 7.5 0 Height Limitation [β] 0-50 0-50 0-50 Legend: L = Lever length of Levelling Valve RH = Ride Height (height of the chassis while driving with the Levelling Valve lever in the horizontal position) RH = Second Ride Height (increased chassis height above RH when pressurising port, e.g. when driving with a lift axle raised) HL = Height Limitation (maximum possible chassis height above RH when operating the Raise/Lower Valve)
PD-500-000 Product Data Doc. No. Y075 (EN - Rev. 00) Graphic Diagram for determining the Chassis height change X and the lever length L 0 on the basis of horizontal lever position x = L x sin a L 00 α X α = 0 50 50 Example 00 Lever length L = 00 mm }Chassis height change X=00 mm Angle a = 0 50 Lever angle a [ ] 50 5 0 5 00 0 5 00 0 5 50 50 0 5 00 0 Lever length L [mm] Chassis height change X [mm]
Commercial Vehicle Systems Doc. No. Y075 (EN - Rev. 00) PD-500-000 Performance Charts SV78 V [l/s] SV95 x V [l/s] 5 x x 0 x x x 8 x 6 x -α [ ] 0 0 0 0 0 0 0 0 0 +α [ ] -α [ ] 0 0 0 0 0 0 0 0 0 +α [ ] SV8 SV SV7 V [l/s] SV65 SV66 SV85 V [l/s] x 0 8 x x 0 8 x x 6 x x 6 x -α [ ] 0 0 0 0 0 0 0 0 0 +α [ ] -α [ ] 0 0 0 0 0 0 0 0 0 +α [ ] Legend: = Free Air in Litres/sec. [l/s] = Lever Deflection in degrees when exhausting [ ] = Lever Deflection in degrees when charging [ ] = = Volume of flow through one port Volume of flow through two ports } at 6 bar supply pressure 5
PD-500-000 Product Data Doc. No. Y075 (EN - Rev. 00) Dimensions SV95 SV78 6 50 5 For presetting the Valve, the lever can be temporarily held in the horizontal position by means of a mm dia. x 0 mm long pin. After setting, the pin MUST be removed A/F Mx.5 0 0 Maximum Operating Angle 50 above or below horizontal Ø 5.8 +0. 6 ± Charging Ø Mx.5 V K Lever must always be in the same direction as the location mark on shaft 9.5 min 5 87.5 Ø 9.5 Ø 8.7 57.5 8 ± 5 Ø 8 ± 6.0 5.8 dia. for 6 dia shaft Exhausting 0 0 0 A/F (Torque to 0 ± Nm) 5 ~ ~9 00 6
Commercial Vehicle Systems Doc. No. Y075 (EN - Rev. 00) PD-500-000 SV8 ) SV SV7 6 ±0,5 0 ±0,5 A/F M x,5 For presetting the Valve, the lever can be temporarily held in the horizontal position by means of a mm dia. x 0 mm long pin. After setting, the pin MUST be removed Maximum Operating Angle 50 above or below horizontal 5 min 5 Ø 5,8 +0, 6 ± 8 ± Charging Ø0 ±0, M x,5 ±, ± Mx,5 ±0,9 87,5 ± 60 ±,5 A/F A/F 0, Ø9,5 ±0, Ø8,5 ±0, 5 ±0, Ø6 +0, +0, Ø 8 ± Ø 6 Exhausting 50 + 0 + Ø0 ±0, - 8 ± ±,5 6,8 ±,5 9 ±0,5 55 ±0,6 Lever must always be in the same direction as the location mark on shaft 00 ± 0 A/F 8 A/F (Torque to 0 ± Nm) ) Port not used 7
PD-500-000 Product Data Doc. No. Y075 (EN - Rev. 00) SV65 SV66 ) SV85 ) Lever must always be in the same direction as the location mark on shaft For presetting the Valve, the lever can be temporarily held in the horizontal position by means of a mm dia. x 0 mm long pin. After setting, the pin MUST be removed Charging Maximum Operating Angle 50 above or below horizontal Exhausting When pressurising port with 8 bar, the chassis height is raised equal to a change in lever angle of a in the exhausting direction Clearance Space for exhausting Eyelet must be hooked Adjustment of Height Limitation: With a mm Allen Key after pulling off the protective cap (maximum torque ±0, Nm) Clearance Space for exhausting ) Without port and a ) Only for part number K0067: ports and are blanked off (Torque to 0 ± Nm) Revision Details Rev. 00 February 06 Correction - SV65 added to Height Limitation Adjustment on page. Rev. 00 SV60 replaced by SV78. 8