OilGear A2 Series Service Manual Download Page 5

© 2019 THE OILGEAR COMPANY - ALL RIGHTS RESERVED

5

Bulletin 948675A

Bulletin 948675A

Safety First

CONTROL SERVICE MANUAL

Hydraulic components can be heavy. Use

caution  while  lifting  these  components.

Serious  personal  injury  can  be  avoided

with proper handling of the components.

Please  contact  Oilgear  if  you  require

assistance,  when  performing  hydraulic

test procedures, use the proper hydraulic

gauges. Installing an incorrect test gauge

could result in serious injury if the gauge

fails.  Use  properly  rated  hydraulic  hoses

to  allow  the  test  gauge  to  be  read  away

from moving parts and functions.

Increasing hydraulic pressure beyond the

recommendations  may  result  in  serious

damage  to  the  pump  and  system  or

serious personal  injury and may void the

Oilgear  Warranty.  If  you  have  questions

concerning hydraulic pressures or testing

procedures, please contact Oilgear before

attempting the test procedures or making

adjustments.

An Oilgear pump must not be modified in

any  way  without  authorization  from

Oilgear.  Modifications  may  not  comply

with  safety  standards,  including  ANSI

safety  standards,  and  may  result  in

serious  personal  injury.  Please  contact

Oilgear if you require assistance.

DO  NOT  enter  under  hydraulic  supported

equipment unless they are fully supported

or blocked. Failure to follow this procedure

can result in serious injury or death.

Any  Oilgear  pump  safety  decals  must  be

replaced  anytime  they  are  damaged,

missing, or cannot be read clearly. Failure

to have proper decals in place can result

in  serious  injury or  death.  (If  you  require

safety  decals,  please  contact  Oilgear  for

replacement safety decals, at no charge.)

Be  sure  everyone  is  clear  of  the  area

around  the  hydraulic  system  before

operating after servicing. Remain attentive

at all times when operating to check your

work  until  you  are  completely  sure  it  is

safe  to  return  to  service.  Failure  to  heed

this  warning  may  result  in  serious

personal injury or death.

Wear  the  proper  protective  clothing  when

operating,  servicing  or  maintaining  the

hydraulic system or the Oilgear pump. Wear

the correct protective gear, safety glasses,

gloves,  and  safety  shoes.  Serious  injury

can result without proper protective gear.

Make  sure  to  keep  hands  and  feet  and

other parts of your body clear of revolving

or  moving  parts.  Failure  to  comply  can

cause serious injury.

DO  NOT  wear  watches,  rings,  or  jewelry

while  working  with  electrical  and

mechanical  equipment.  These  items  can

be hazardous and can cause serious and

painful  injuries  if  they  come  into  contact

with  electrical  wires,  moving  parts,  or

hydraulic equipment.

!

WARNING

!

WARNING

!

WARNING

!

WARNING

!

WARNING

!

WARNING

!

WARNING

!

WARNING

!

WARNING

!

WARNING

Summary of Contents for A2 Series

Page 1: ...bed in this bulletin and other changes may be made without notice REFERENCE MATERIAL Fluid Recommendations Bulletin 90000 Contamination Evaluation Guide Bulletin 90004 Filtration Recommendations Bulle...

Page 2: ...Diagram Control Behavior Curve for P 1NN Control 6 Troubleshooting 7 Principle of Operation Starting Raising Pressure 8 10 Principle of Operation Compensating Pressure Unloading 11 12 Screw Plug Torqu...

Page 3: ...hrough Oilgear Contact us on our website www oilgear com Please contact us if you have any questions regarding the information in this instruction bulletin The cleanliness of working on this pump cont...

Page 4: ...e failure This can cause serious injury Please contact Oilgear for assistance when required Hydraulic cylinders can be holding a function in a certain position when the pump is off An example of this...

Page 5: ...ipment unless they are fully supported or blocked Failure to follow this procedure can result in serious injury or death Any Oilgear pump safety decals must be replaced anytime they are damaged missin...

Page 6: ...in 948675A CONTROL SERVICE MANUAL Figure 2 ASA Diagram for P 1NN Control Shown with Typical Pump Figure 3 Curve Indicating Flow Versus Pressure for P 1NN Type Control A 1 B GPA 2 P O 1 P O OP 6 OP 3 O...

Page 7: ...ck Worn pistons and or piston bores Maximum volume stop adjusted incorrectly Adjust maximum volume stop CCW to increase flow Pressure compensator is set too close to operating pressure Adjust pressure...

Page 8: ...rol Functionally the swashblock and resultant displacement is positioned by two opposite acting control pistons unloading control piston and bias control piston See control parts drawing for actual co...

Page 9: ...ol 305 and to the bias control piston 303 Outlet pressure is also transmitted through orifice Port OP 2 allowing the pressure acting on either end of the control spool 305 to be equal In this conditio...

Page 10: ...tin 948675A 10 Bulletin 948675A CONTROL SERVICE MANUAL Figure 4 Raising Pressure Loading TO SYSTEM UNLOADING CONTROL BIAS CONTROL OP 4 OP 3 OP 2 OP 14 OPTIONAL OP 1 OP 6 328 305 PRESSURE COMPENSATOR R...

Page 11: ...NG PRESSURE If the system pressure drops below the preset compensating pressure the relief valve poppet 307 seats and closes the path to drain Pressure on either side of the control spool 305 will bec...

Page 12: ...Bulletin 948675A 12 Bulletin 948675A CONTROL SERVICE MANUAL Figure 5 Compensating Pressure Unloading TO SYSTEM UNLOADING CONTROL BIAS CONTROL OP 4 308 OP 3 OP 2 OP 14 OPTIONAL OP 1 OP 6 328 305 327 31...

Page 13: ...3 Plug 1 8 internal 720 SAE 12 Part 1 1 4 external Tightening Torque 50 ft lbs 68 Nm 200 in lbs 23 Nm 80 ft lbs 108 Nm 100 ft lbs 136 Nm 100 ft lbs 136 Nm 100 ft lbs 136 Nm 48 in lbs 5 Nm 120 in lbs...

Page 14: ...r and bulletin number and item number Specify type of hydraulic fluid to ensure seal and packing compatibility Item Number Quantity Description 301 1 Control Housing 302 1 Control Piston 303 1 Bias Pi...

Page 15: ...lletin 948675A 15 Bulletin 948675A CONTROL SERVICE MANUAL PVG P 1NN Control Service Kits Reference 167 Ass y Drwg Document Number 520167 SK1 Revision 0 8 Sheet 1 of 1 Description Kit Number Design Ser...

Page 16: ...THE OILGEAR COMPANY ALL RIGHTS RESERVED Bulletin 948675A 16 Bulletin 948675A CONTROL SERVICE MANUAL Figure 6 Exploded Parts Drawing for PVG 180 P 1NN Single Pressure Compensator Control 520167 831 sh...

Page 17: ...E OILGEAR COMPANY ALL RIGHTS RESERVED Bulletin 948675A 17 Bulletin 948675A CONTROL SERVICE MANUAL Figure 7 Cross Section Parts Drawing for PVG 180 P 1NN Single Pressure Compensator Control 520167 831...

Page 18: ...2019 THE OILGEAR COMPANY ALL RIGHTS RESERVED Bulletin 948675A 18 Bulletin 948675A CONTROL SERVICE MANUAL NOTES...

Page 19: ...2019 THE OILGEAR COMPANY ALL RIGHTS RESERVED Bulletin 948675A 19 Bulletin 948675A CONTROL SERVICE MANUAL NOTES...

Page 20: ...AILABILITY 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...

Reviews: