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PURPOSE OF INSTRUCTIONS
These instructions will simplify the installation,
operation, maintenance and troubleshooting of
Oilgear type "PVG" pumps.
REFERENCE MATERIAL
Fluid Recommendations........................................................................................................................... Bulletin 90000
Contamination Evaluation Guide ............................................................................................................ Bulletin 90004
Filtration Recommendations..................................................................................................................... Bulletin 90007
Piping Information .................................................................................................................................... Bulletin 90011
Installation of Vertically Mounted Axial Piston Units................................................................................. Bulletin 90014
PVG Open Loop Pumps, Sales ............................................................................................................Bulletin 47019-K
Pump Control Instructions, Series A1
"P-1NN" Single Pressure Compensator ................................................................................................ Bulletin 948675
"P-1NN/F" Single Pressure Compensator w/Load Sense ..................................................................... Bulletin 948676
"P-1NN/H" Single Pressure Compensator w/H.P. Limiter ..................................................................... Bulletin 948677
"P-1NN/G" Horsepower Limiter w/Load Sense .................................................................................... Bulletin 948678
"P-1NN/K" Single Pressure w/Load Sense, Minimum Standby ............................................................ Bulletin 948683
"P-1NN/L" Single Pressure w/HP Limiter & Load Sense, Minimum Standby ....................................... Bulletin 948684
"P-2" Dual Pressure Compensator ...................................................................................................... Bulletin 948679
"P-C & P-K" Single Pressure - Soft Start ............................................................................................. Bulletin 948680
"P-CNN/H & P-KNN/H" Single Pressure - Soft Start w/H.P. Limiter ...................................................... Bulletin 948681
"P-2NN/H" Dual Pressure Compensator w/H.P. Limiter ........................................................................ Bulletin 948682
"P-E" Electronic Displacement Control ................................................................................................ Bulletin 948690
"P-E/F" Electronic Displacement Control w/Load Sense ..................................................................... Bulletin 948691
Issued: May 2019
PUMP SERVICE MANUAL
OILGEAR TYPE "PVG" PUMPS
180 (SERIES A2)
SERVICE INSTRUCTIONS
Figure 1. Typical Oilgear "PVG" Open Loop Pump
THE OILGEAR COMPANY
905 South Downing Street
Fremont, NE 68025 USA
Become familiar with the construction, principle of
operation and characteristics of your pump to help
you attain satisfactory performance, reduce shut-
down and increase the pump's service life. Some
pumps have been modified from those described in
this bulletin and other changes may be made
without notice.
www.oilgear.com
Bulletin 948034A
Bulletin 948034A
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Table of Contents
Related Manuals for OilGear A2 Series
Summary of Contents for OilGear A2 Series
- Page 1 Bulletin 948034A OILGEAR TYPE “PVG” PUMPS 180 (SERIES A2) SERVICE INSTRUCTIONS Figure 1. Typical Oilgear “PVG” Open Loop Pump PURPOSE OF INSTRUCTIONS Become familiar with the construction, principle of operation and characteristics of your pump to help These instructions will simplify the installation,...
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Page 2: Table Of Contents
PVG Pump Torques Numbers & Descriptions ................ 19 Parts List..........................20 O-Ring Seals Item Number List ....................21 Service Kits List .......................22 - 23 Parts Exploded Views ......................24 - 27 Spare Parts Availability ......................28 © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A... -
Page 3: Safety First
Or visit our website: www.oilgear.com. hydraulic leaks, please contact Oilgear Please contact us if you have any prior to servicing. questions regarding the information in this instruction bulletin. Bulletin 948034A © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED... - Page 4 “Twist” may result in premature hose from the system, please contact Oilgear. failure. This can cause serious injury. Please contact Oilgear for assistance when required. © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A...
- Page 5 Failure to follow this procedure with electrical wires, moving parts, or can result in serious injury or death. hydraulic equipment. Bulletin 948034A © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED...
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Page 6: Preparation And Installation
Make provisions for opening this line Misalignment of pump shaft to driver's shaft should without draining (siphoning) reservoir. not exceed 0.005 inches (0,13 mm) Total Indicator Readout (TIR) in any plane. © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A... - Page 7 The swashblock is swiveled by a control Torque to turn drive shaft should be 9 to 24 ft•lb (included in referenced material). Refer to (12 to 32 N•m). PRINCIPLE OF OPERATION. © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A...
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Page 8: Principle Of Operation
B to the A crescent again and the cycle is repeated. SECTION A-A Figure 3. Position B, Pump During Full Delivery From Port B © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A... - Page 9 Figure 4. Position B/2, Pump During One Half Delivery From Port B NEUTRAL NEUTRAL SECTION A-A Figure 5. Position N, Pump In Neutral, No Stroke, No Delivery Refer to SPECIFICATIONS © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A...
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Page 10: Specifications
226,1 197* SAE “D” 4 bolt All dimensions (without controls) are approximate. For detailed dimensions, contact your Oilgear Representative. * Weight with "P-1NN" Control and thru shaft valve plate. Table 2. Nominal Dimensions without controls. Refer to installation drawings for more detailed dimensions and port configurations. -
Page 11: Troubleshooting
Inspect components. Replace. Faulty output circuit components (continuous blowing relief valves or "slip" through valves, cylinder or other components. Insufficient cooling provision or clogged coolers. Inspect for obstruction. © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A... -
Page 12: Testing And Adjusting / Disassembly
(siphon) the reservoir. Additional leakage indicates wear, but NOTE does not become critical until it impairs (continued) performance. © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A... - Page 13 2. Remove the valve plate (401) by removing four socket head cap screws (403) and lifting it straight up. 3. Remove valve plate O-ring (1013) and (1261). © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A...
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Page 14: Rotating Group / Inspection
0.001 inches (0,03 mm). Be sure to stone lightly. Any excessive NOTE stoning will remove the hardened surface. If wear or damage is extensive, replace the valve plate. © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A... - Page 15 All shoe faces must be free of nicks. End play should not exceed 0.002 inches NOTE (0,076 mm) when new or 0.006 inches (0,152 mm) when worn. Figure Hydrodynamic Bearing removal © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A...
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Page 16: Assembly
Press the bearing until the tool becomes flush with the valve plate mounting surface. © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A... - Page 17 PUMP SERVICE MANUAL Bulletin 948034A 10. Hydrodynamic Bearing Seam Orientation 11. Hydrodynamic Bearing Installation © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A...
- Page 18 On thru-shaft units connected to another pump or device, install coupling (501). Refer to PREPARATION and INSTALLATION when pump is ready to be returned to service. © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A...
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Page 19: Pvg Pump Torques Numbers & Descriptions
PUMP SERVICE MANUAL Bulletin 948034A Fastener or Plug Head Type Tightening Description Item Number & Size Torque 3.25 1.23 Table 3. PVG Pump Torques © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A... -
Page 20: Parts List
204a Screw (SAE A,B,C 2 bolt) 204b Screw (SAE 4 bolt, SAE D) Washer (SAE A,B,C 2 bolt) Washer ( SAE 4 bolt, SAE D Screw Screw Cover Plate © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A... -
Page 21: O-Ring Seals Item Number List
253/70 253/80 1261 261/70 261/80 1902 1 (RH units) 902/90 902/80 1903 1 (RH units) 903/90 903/80 1903 2 (LH units) 903/90 903/80 1904 904/90 904/80 1916 916/90 916/80 © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A... -
Page 22: Service Kits List
A1, A2 SAE B 2-Bolt Coupling & Adapter Kits Viton Seals K319076-103 A1, A2 501, 502, 503(2),504(2), 1155, 1158 Buna Seals K319076-203 A1, A2 EPR Seals K319076-303 A1, A2 © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A... - Page 23 A1,A2 501, 502, 503(4),504(4), 507(4), 1049, 1163 EPR Seals K319076-307 A1,A2 Name Tag & Screws L50921 A1,A2 003, 008(2) * A2 Rotating Group Required for Operation above 1800 RPM © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A...
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Page 24: Parts Exploded Views
PUMP SERVICE MANUAL Bulletin 948034A Figure 12. Cross Section and Exploded Parts Drawing for PVG 180 (520147-181 sheet 1 of 5) © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A... - Page 25 PUMP SERVICE MANUAL Bulletin 948034A Figure 13. Exploded Parts Drawing for PVG 180 (520147-181 sheet 2 of 5) © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A...
- Page 26 PUMP SERVICE MANUAL Bulletin 948034A Figure 14. Exploded Parts Drawing for PVG 180 (520147-181 sheet 3 of 5) © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A...
- Page 27 PUMP SERVICE MANUAL Bulletin 948034A Figure 15. Cross Section and Exploded Parts Drawing for PVG 180 (520147-181 sheet 4 of 5) © 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED Bulletin 948034A...
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Page 28: Spare Parts Availability
PUMP SERVICE MANUAL Bulletin 948034A SPARE PARTS AVAILABILITY Prepare for your future needs by stocking Oilgear original factory parts. Having the correct parts and necessary skills “in-plant” enables you to minimize “down-time.” Oilgear has developed parts kits to cover likely future needs. Oilgear Field Service...