Eaton PVE12 Instructions d'exploitation

M-2854-SReleased 8/1/90Overhaul ManualPVE Variable Pump12–21 USgpm capacity at 1800 rpmVickers®Piston Pumps

10External Valve Spool Orifice Size IncreasedIf the external valve spool orifice size is increased, pumpoutlet pressure will decrease, lowering force

11Figure 5. Load Sensing Pressure Limiting Compensator (CVP, CVPC, CVPD)CompensatorSpringDrainCompensatorSpoolYoke Stroking PistonRotating GroupYoke S

12Section IV – Installation and Operating Instructions A. Installation DrawingsThe installation drawing listed in Table 2 will show installationdimen

13Sound LevelNoise is only indirectly affected by the fluid selection, but thecondition of the fluid is of paramount importance in obtainingoptimum re

14Section V – Service and Maintenance A. Service ToolsThe following standard tools for overhauling the piston pumpare shown in Figure 8.Standard Tools

15Figure 8. Standard Tools.123456Figure 9. Special Shaft Bearing Removaland Installation Tools.1.2321.500“A”Use for “A”Intermediate shaft bearing inst

16Figure 11. Special Bearing Race Installation Tools.“C”“B”“A”.375NominalPipeSizeABC1 1/2” 4” 1.625 1.9002” 4” 2.125 2.375 Schedule 80 (extra he

17G. Troubleshooting Table 3 lists the common difficulties experienced with pistonpumps and hydraulic systems. It also indicates probablecauses and re

18Section VI – Overhaul A. GeneralCAUTIONBefore breaking a circuit connection, make certainthat power is off and system pressure has beenreleased. Low

1955545352515049273060595857343536455554535251 5049273372237170444240343735312926254341393836283264656669746867Figure 13. PVE19/21 Exploded ViewRefer

2Table of ContentsSection PageI. Introduction3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

20Figure &IndexNo.UnitsperAssemblyDescription12345678910111213141516171819202122232425262728293031323334353637383940414243444541111111111111111111

214567891012432725657585960616230255554535251504946474844452755545352515049Figure 13. PVE19/21 Exploded View

22639108751211817161514134111923243221202269686771 707326293166434241403934383736353328326564

233. Inspect spring (8) and (16) for wear and parallelism.Spring ends must be parallel. Replace if spring is warped orwear is evident.4. Inspect seat

24Figure 14. Cylinder block subassembly disassembly tool.(Tighten nut, remove snap ring, loosen nut to relievespring tension).Figure 14a. Cylinder Blo

25NOTEIf shims (51) were destroyed during disassembly, ayoke bearing preload adjustment must be made atassembly.c. Slide the yoke from side to side to

26Figure 16. Removal of Front Bearing Race.Figure 17. Front Bearing Removal.ShaftSeal1 1/2” heavy wall tubing 6” long.See Figure 11.Arbor Press HereRe

27a. Assemble pintle bearings (55) on each end of theyoke and insert bearing races (54).b. Install bearing spacer (53) at one pintle end.c. Install O-

28H. Disassembly of Valve Block1. Do not disassemble check valve parts (64) through(66), unless action of the valve indicates a problem. Checkthe valv

292. Install pipe plug (69) into valve block (26) and secure.3. Assemble a new O—Ring (68) on hex plug (67) andthread plug into place.K. Shaft Bearing

3Section I – Introduction A. Purpose Of ManualThis manual describes operational characteristics andoverhaul information for the PVE12, 19(*) and thePV

30Section VII – Test Procedure A. Test ConditionsFLUID MEDIUM: SAE 10W meeting API service classificationMS or equivalent.FLUID TEMPERATURE: 120°F ±5°

31F. Performance Test of PVE12/19/21 Piston Pump with “CG”Compensator Control1. Operate pump at 1200 RPM. Set remote control valve tominimum pressure

32G. Performance Test of PVE12/19/21 Piston Pump with “CV”,“CVP”, “CVPC” and “CVPD”Compensator ControlNOTERefer to Figure 24 for location of circuit c

33ModelCompensator Pressure Setting PsigTable 9. Load sensing compensator adjustment range.LockwireStandbyPressureP2P @USgpm(P2-P1)P @ CompensatorCrac

4C-10 –CG-10 –CV-10 –CVP-12 –CVPC-12 –Pressure compensated(PVE19, 250-3000 psi)(PVE21, 250-2700 psi)Remote control pressurecompensator adjustablefrom

5Figure 1. Sectional Views of the PVE PumpsDrive ShaftPVE19 Section ViewPVE12 Section ViewHousingRotating GroupTapered RollerBearingYokeWafer PlateCom

6Section II – Description A. GeneralAssembly of a typical pump package is shown in Figure 1.Six types of compensator subassemblies are used with thePV

7Section III – Principles of Operation A. Piston PumpRotation of the pump drive shaft causes the cylinder block,shoe plate and pistons to rotate. See

8Figure 3. Flat Cut-Off CompensatorCompensator SpringDrainPump LoadCross Hole (Open toSpring Area)Compensator SpoolYoke Stroking PistonRotating GroupY

9Figure 4. Load Sensing Compensator (CV).Compensator SpringDrainCompensator SpoolYoke Stroking PistonRotating GroupYoke SpringInletOutletActuatorLoadE