Models: 02-7815C0110, 02A7815C0110, 02A7848C0120
10 Ton (9.07 Metric) Two Stage Jack with Air Pump
07/2021 | Rev. 06
Page | 6
6.0
TROUBLE SHOOTING
TROUBLE
PROBABLE CAUSE
ACTION
Fluid leakage at pump piston or
pump body
Damaged backup ring, o-ring, piston or
pump body
Replace pump
External fluid leakage at rams
Damaged o-ring, backup ring or inner
cylinder wall
Remove rams as a unit from cylinder.
Inspect parts. Replace o-ring and
defective part(s)
Jack fails to lift rated load
Release valve not closed properly
Fully tighten release valve
Low fluid level
Fill to correct fluid level
Pressure relief valve improperly adjusted
Adjust or replace release valve
Leakage at inlet or outlet check ball
Inspect valve body for wear or replace
valve body and check balls
Vent screw closed
Open vent screw
Rams will not support load after
manual or pneumatic pump up
Leaking ram o-ring seals
Check for external leakage, if present
replace defective seal and back up ring
Leaking pressure check valve
Inspect valve body for wear or replace
valve body and check balls
Leaking pressure relief valve
Remove release valve, inspect ball and
ball seat in pump block. Replace
effective part(s)
Rams raise and fall with each
manual pump stroke
Release valve open
Fully tighten release valve
Inlet check valve not seated or sticking
Pump rapidly to dislodge or replace valve
body
Pressure check valve not seated or sticking
Pump rapidly to dislodge or replace valve
body
Jack fails to lower
Ram locknut not loosened
Raise jack ¼ inch and release locknut
Vent screw closed
Open vent screw
O-Ring (pinched or rolled)
Replace o-ring and back-up ring, clean
up cylinder wall of debris
Summary of Contents for 02-7815C0110
Page 17: ...APPENDIX I Hydraulic Schematic...
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Page 19: ...Hydraulic Schematic 02 7815C0110...
Page 20: ...Hydraulic Schematic 02A7815C0110 02A7848C0120...
Page 21: ...APPENDIX II Air Pump Manufacturer Data...
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Page 49: ...APPENDIX III Safety Data Sheet MIL PRF 5606 Hydraulic Fluid...
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Page 63: ...APPENDIX IV Declaration of Conformity...
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Page 67: ...APPENDIX V Maintenance Schedule...
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