Model: 2295-10PR (9694-010)
95 Ton (86 Metric Ton) Alligator Axle Jack
01/2019 | Rev. 01
Page | 4
6.0
TROUBLE SHOOTING
If operational troubles are encountered, refer to the Trouble Shooting Chart which lists the most commonly occurring problems
and gives information which will facilitate location of trouble source and determination of remedial action.
TROUBLE
PROBABLE CAUSE
REMEDY
External fluid leakage at
pump piston or pump body
Damaged backup ring, packing,
piston or pump body
Remove affected piston and inspect piston and pump
body for damage. Replace defective parts. Replace
removed packing and backup ring
External fluid leakage at
rams
Damaged backup ring, packing or
inner cylinder wall
Withdraw rams as a unit from cylinder. Inspect defective
parts. Replace o-ring
Withdraw screw extension and ram components as a
unit from cylinder. Inspect defective parts. Replace o-ring
Jack fails to lift rated load
with operation of manual
pump
Incomplete closure of release valve
Fully tighten release valve
Obstructed fluid suction passages
Remove pump rocker and link details. Unscrew pump
body; remove assembled valve assembly. Blow passage
clear with compressed air; flush with clean fluid,
reassemble and fill with hydraulic fluid
Low fluid level
Fill to correct fluid level
By-pass valve improperly adjusted
Test and adjust by-pass valve
Broken compression spring
Remove pump rocker and link details, unscrew pump
body. Remove and replace defective valve assembly;
test and adjust by-pass valve
Air lock or vacuum in reservoir, due to
clogged breather passage in air vent;
clogged intake oil screen
Remove air vent assembly and/or oil screen and clear
the obstruction
Rams will not fully elevate
when manual pump is
operated
Low fluid level
Fill to correct fluid level
Leaking pump discharge valve or
leaking pump suction valve
Remove pump rocker and link details, unscrew pump
body. Remove and replace defective valve assembly;
test and adjust by-pass valve
Rams will not support load
after manual pump up
Internal pressure leakage at ram
static or dynamic seals
Check for external leakage. If present, replace defective
seal. If no external leakage is observed then remove
screw extension and check for oil inside of chamber. Oil
here can be from a weld leak or leakage by the 1/8” pipe
plug or the side of the housing
Leaking pump discharge valve
Remove the check valve and verify holding capacity on
test stand. If leakage occurs, replace
Pressure leakage past release valve
ball
Remove release valve, inspect ball and ball seat in pump
block. Replace defective parts
Rams elevate and fall with
each manual pump stroke
Incomplete closure of release valve
Fully tighten release valve
Check valve next to cylinder and in
hand pump, both are defective
Remove and replace defective check valve
Pressure leakage past release valve
ball
Remove release valve. Inspect ball and ball seat in pump
block. Replace defective parts
Manual pump inoperative
or difficult to operate
Air lock or vacuum in reservoir due to
clogged breather passage in air vent
assembly, clogged intake oil screen
Remove air vent assembly, and/or oil screen and clear
obstruction
Pump-up satisfactory, but
pump pressure fails to by-
pass at maximum ram
extension or with overload
applied
By-pass valve improperly adjusted
Test and adjust by-pass valve
Defective or jammed by-pass valve
spring, rivet or ball
Remove pump rocker and link details, unscrew pump
body. Remove and replace defective valve assembly.
Test and adjust by-pass valve
Summary of Contents for Columbus Jack 2295-10PR
Page 2: ...REVISION DATE TEXT AFFECTED 01 01 2019 Original release ...
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Page 27: ...APPENDIX I Routine Jack Maintenance Bulletins ...
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