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Continental Hydraulics PVX Series Repair Manual

Vane pumps "a" design series
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REPAIR PROCEDURES
MANUAL
PVX Series Vane Pumps
"A" Design Series
Step-by-Step Guide to Troubleshooting and Repairing
PVX Series Vane Pumps
Form No. 264728 Rev. 11/08

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Summary of Contents for Continental Hydraulics PVX Series

  • Page 1 REPAIR PROCEDURES MANUAL PVX Series Vane Pumps “A” Design Series Step-by-Step Guide to Troubleshooting and Repairing PVX Series Vane Pumps Form No. 264728 Rev. 11/08...
  • Page 2 Introduction In many cases, dirt or contaminants in the Thank you for choosing Continental hydraulic system lead to pump wear and Hydraulics PVX Vane Pumps for your failure. If your PVX pump failed due to dirt or application. contamination, be sure to thouroughly clean and flush all parts of the system, paying PVX Pumps are designed to provide reliable special attention to power unit reservoirs.

  • Page 3: Table Of Contents

    Table of Contents Part Identification Adjustment Procedure – Single Stage Exploded View Drawing ....Compensator Parts List ......... General ........... 23-24 Disassembly Procedures – Pumps Adjustment Procedure – Two-Stage General ..........Compensator Getting Started ........ General ........... Disassembly Instructions ....Multi-Pressure Compensator Assembly Procedures –...

  • Page 4: Part Identification

    Part Identification Exploded View Drawing Torque to 12 lb/in (Torque to 1.4 Nm) Torque to 850 lb/in (Torque to 96 Nm) PVX-20/36 Torque to 1800 lb/in (Torque to 204 Nm) PVX-46/60/75 Torque to 4970 lb/in (Torque to 562 Nm) Torque to 850 lb/in (Torque to 96 Nm) Parts List REFERENCE...

  • Page 5: Disassembly Procedures - Pumps General

    Disassembly Procedures – Pumps General The disassembly procedure shown on the following pages covers the Continental Hydraulics PVX-8 thru 75 variable volume vane pumps. The complete disassembly procedures are similar for all pumps. Any differences between the pump models are described in additional notes.
  • Page 6 Disassembly Instructions – Pumps (continued) 3. Insert flat blade screwdriver into the slots provided 5. Remove the cover o-ring. on each side of the cover. Pry the cover assembly loose using equal force on each screwdriver. After the cover is loose, carefully remove it by hand and set aside in a clean area.
  • Page 7 Disassembly Instructions – Pumps (continued) 8. Remove the four (4) socket head cap screws on 11. For the PVX-8/11/15 pumps, loosen the locknut the compensator by using the appropriate Allen with adjustable wrench (not pictured). For the PVX- wrench and remove the compensator. 20 thru 75 pumps, loosen the thrust screw lock ring by using a spanner wrench.
  • Page 8 Disassembly Instructions – Pumps (continued) 13. Remove the pressure ring. 16. If the bearings are damaged and need to be replaced, remove the bearings in the body and the cover by using a blind hole bearing puller. Figure 13. 14. Remove the spacer ring. Figure 16.

  • Page 9: Assembly Procedures - Pumps

    General Seal Kits To guarantee proper operation of your PVX pump, MODEL PVX-8 264275 Continental Hydraulics recommends relacing all PVX-11/15 264276 important pump parts by using the CHD Repair Kit PVX-20/29/36 264277 and the CHD Seal Kit. The complete assembly...

  • Page 10: Getting Started - Tools

    Assembly Procedures – Pumps (continued) Getting Started - Tools PVX Model 11/15 20/29/36 46/60/75 Cover 8 mm 10 mm 14 mm 17mm Allen Wrench Installation Pins into Hammer Port Plates Compensator & Bias Cover 6 mm 8 mm Allen Wrench Thrust Screw Spanner Socket - 8 mm Allen Wrench Thrust Screw Lock Nut...
  • Page 11 Assembly Procedures – Pumps (continued) 5. Replace the seals and back-up rings on the backside of both port plates. Install seals on each port plate. Figure 7. NOTE: Be certain to ensure that the correct port plates are installed in the body and cover. If unsure, Figure 5.
  • Page 12 Assembly Procedures – Pumps (continued) 9. Assemble the bias piston into the body through the 12. For PVX-8/11/15 pumps, install the thrust screw clearance hole in the spacer ring. Lubricate the in the body by using an Allen head wrench. For PVX- piston with clean hydraulic fluid.
  • Page 13 Assembly Procedures – Pumps (continued) 13. For PVX-8/11/15 pumps, use an Allen wrench to 15a. Make sure that the direction of the rounded tighten the thrust screw to the torque rates shown. vane tips matches the direction of pump rotation. The For PVX-20 thru 75 pumps, install the thrust screw pump rotation is shown on the pump body and the lock ring and tighten it by using the adjustable face...
  • Page 14 Assembly Procedures – Pumps (continued) 17. Mount the compensator to the pump and torque 19. Insert O-ring onto the body pilot bore. A the four (4) socket head cap screws by using the minimum amount of grease or petroleum jelly may be appropriate Allen wrench.
  • Page 15 Assembly Procedures – Pumps (continued) 20. Install the cover by inserting the four (4) socket head cap screws with the appropriate Allen wrench or socket. Torque the screws from the chart below. Keep the mating surfaces of the pump body and cover free of oil, dirt and/or grease before assembling the cover.

  • Page 16: Disassembly Procedure - Two-Stage Compensator General

    Disassembly Procedures – Two-Stage Compensator General 2. Remove the spring and the seat from the second Shown below are the Continental Hydraulics two- stage body. stagecompensators rated at 3000 psi (210 bar). On the left is for PVX-8/11/15; on the right, PVX-20 thru 75.
  • Page 17 Disassembly Procedures – Two-Stage Compensator (continued 5. Remove the three (3) socket head cap screws that by using an adjustable wrench. Remove the attach the second stage to the first stage body by differential spring, spring seat, external washer and using the appropriate Allen wrench.
  • Page 18 Assembly Procedures – Two-Stage Compensator Assembly Instructions 3. Place the spring seat on the spring, then insert the 1. Thoroughly lubricate the compensator spool with spring and spring seat into the adjustment housing. clean hydraulic fluid. Make sure there are no burrs on the spool and insure that the spool has no residual magnetism.

  • Page 19: Compensator

    Assembly Procedures – Two-Stage Compensator (continued 5a. For PVX-8/11/15 pumps, replace the plug with the 8. You may place the compensator upright to insert O-ring for the shock clipper on the first stage the guided poppet into the second stage compensator and torque to 144-180 in.-lbs.

  • Page 20: Compensator

    Assembly Procedures – Two-Stage Compensator (continued 9a. Mount the pressure adjustment assembly to the 11a. Mount the first stage to the second stage body. second stage compensator. Torque the three (3) socket head cap screws to 129- 171 in.-lbs. (15-20 Nm). F i g u r e 10.

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