Related Manuals for Continental Hydraulics PVX Series
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
Assembly Procedures – Pumps General Seal Kits To guarantee proper operation of your PVX pump, MODEL Continental Hydraulics recommends relacing all PVX-8 264275 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 Procedure - Two-Stage Compensator Assembly Instructions
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 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 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.
-
Page 21: Disassembly Procedure - Single Stage Compensator General
Disassembly Procedures – Single Stage Compensator General 3. Remove the hex. head plug on the side of the Shown below is the Continental Hydraulics single single stage compensator by using the appropriate stage compensator. Following are the complete Allen wrench. -
Page 22: Assembly Procedure - Single Stage Compensator General
2. Replace the O-ring and the back-up ring on the To guarantee proper operation of the single stage adjustment knob. compensator, Continental Hydraulics recommends relacing all compensator seals included in the CHD Compensator Seal Kit. The step number corresponds to the photo or illustration of the same number. - Page 23 Assembly Procedures – Single Stage Compensator (continued 4. Replace the O-ring on the hex. head plug and 7. Replace the O-rings on the backside of the insert it into the compensator on the opposite side of compensator. the adjustment knob. Torque to 283-369 in.-lbs. (33- 43 Nm).
-
Page 24: Proper Setting Of The Thrust Screw Adjustment Instructions
Proper Setting of the Thrust Screw Adjustment Instructions If you are working on a PVX-8/11/15 pump, make Make sure the pump is in “deadhead” condition sure the shock clipper port is blocked (located on before attempting adjustment of the thrust screw. the side of stage one, the lower section of the The “deadhead”, or compensated condition, can two-stage control) before adjusting the thrust... -
Page 25: Adjustment Procedure - Single Stage Compensator General
Adjustment Procedures – Single Stage Compensator General In this position, fluid from the pressure port can flow The single stage through the compensator to the control piston and compensator consists of a allow system pressure to be applied to the control spool, spring and adjusting piston. - Page 26 Adjustment Procedures – Single Stage Compensator (continued) The further the spool moves, the greater the amount of fluid bled off from the control piston chamber across the variable orifice created by the tank land. Since the flow of fluid to the control piston is limited by the orifice created by the flats on the pressure land, the pressure in the control chamber has dropped to approximately half of the outlet pressure,...
-
Page 27: Adjustment Procedure - Two-Stage Compensator General
Adjustment Procedures – Two-Stage Compensator General stage spool. Fluid that is under pressure always The two-stage compensator works exactly the same takes the path of least resisitance and, when the as the single stage control. However, instead of second stage opens, the entire pump flow is going to loading the spool with a spring, it is hydraulically try to flow through the compensator to the tank. -
Page 28: Multi-Pressure Compensator
Multi-Pressure Compensator General Information Solenoid Operated Two-Pressure Pump Control MTG. Datum ‘T’ Unless Otherwise Specified 1.73 and Optional Quick Connect All Dimensions are Normal. Multi-pressure pump control can markedly reduce (43.9) horsepower demand and heat generation during periods of idle time or time in the machine operating Pump cycle when maximum pressure is not required. -
Page 29: Solenoid Vented
Multi-Pressure Compensator (continued) Solenoid Vented 4. Follow the procedure to set the first stage setting The following illustration as detailed in the section “Proper Setting of the shows the solenoid Thrust Screw”. vented compensator. 5. With the solenoid closed, adjust the high pressure Once again, the adjusting knob to set the maximum compensating solenoid must be... - Page 30 Multi-Pressure Compensator (continued) The two-stage pressure compensator module is the The following graphic illustration shows a flow versus basic foundation for the LSFC. The control seeks to pressure characteristic curve. The curve shows that maintain a constant pressure drop across a remote two (2) shaded areas must be avoided! First, flow orifice.
-
Page 31: Torque Limiter
Multi-Pressure Compensator (continued) The torque limiter control has two (2) customer 1st Stage settable adjustments: the second stage pressure adjustment (knurled knob parallel to the inlet/outlet ports) is used to set maximum deadhead pressure of the pump. A family of pressure cut-off curves are Changeable achievable using this adjustment. - Page 32 Multi-Pressure Compensator (continued) The illustration below shows the second stage The illustration below shows that it is possible to set pressure adjustment (pressure cut-off curve) will the torque limiter cut-off point to a level where the override the torque limiter adjustment (torque cut-off pressure cut-off curve is not reached.
-
Page 33: Setting The Maximum Deadhead
Multi-Pressure Compensator (continued) Setting the Maximum Deadhead Pressure (Second limiter adjustment knob in for higher torque and out Stage Setting) for less torque in small increrments. PVX torque limiter adjustment stems that 6. Continue this process until the desired conditions are achieved. -
Page 34: Fluids, Filters And System Preparation
Fluid Recommendations supplier for system preparation instructions. Continental Hydraulics recommends the use of premium quality hydraulic fluids, such as Mobil DTE Continental Hydraulics recommend that the usersof 25, DTE 26 or equivalent, with zinc anti-wear fire resistant fluids obtain a copy of the NFPA additives. -
Page 35: Pump Installation Procedure
Do not force hard piping to components before installation. align to the pump ports. This may pull the pump 2. Prior to installation, Continental Hydraulics out of alignment with the motor. recommends pouring a small amount of clean hydraulic fluid into the pump inlet port. -
Page 36: System Start-Up Procedure
Once all air contained in the pump has been purged, the valve automatically closes. 3. If your pump incorporates the optional screw volume control, Continental Hydraulics recommends not reducing the pump’s output flow by more than 50% on start-up (pump flow is reduced by turning the adjustment screw clockwise). -
Page 37: Trouble Shooting
Trouble Shooting Some of the most common difficulties that could be experienced in the field are listed here with potential causes and their remedies. TROUBLE POTENTIAL CAUSE REMEDy Excessive 1) Coupling misalignment Align the pump and motor shaft to within .006 inch (.152 mm) pump noise total indicator reading. - Page 38 Trouble Shooting (continued) TROUBLE POTENTIAL CAUSE REMEDy Pump is 1) Contamination in the compensator. Thoroughly clean the control orifices and check filtration. 2) Pressure ring is not moving properly. Control piston should be checked for freedom of movement. unstable System is 1) Case drain line is installed too close The case drain and pump inlet should be separated by a too hot...
- Page 39 Trouble Shooting (continued) TROUBLE POTENTIAL CAUSE REMEDy Pump not 1) Pump not delivering oil. See Trouble Shooting section “Pump not delivering oil”. maintaining 2) Pressure adjustment screw not Set adjusting screw to obtain desired operating pressure. pressure set high enough. 3) Compensator is in bad condition.
-
Page 40: Dimension Drawing
4895 12th Avenue East Shakopee, MN 55379 Phone: (952) 895-6400 Fax: (952) 895-6444 www.continentalhydraulics.com Because Continental Hydraulics is continually improving its’ products, specifications and appearance are subject to change without notice. Form No. 264728 Rev. 11/08 © 2008 Continental Hydraulics. Printed in U.S.A...
Need help?
Do you have a question about the PVX Series and is the answer not in the manual?
Questions and answers