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Page Title:
Table 3-2. Organizational Troubleshooting Data (Cont) |
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 TM 55-1730-208-13
Malfunction
Probable Cause
Sticking intake valve ball
Operate pump handle rapidly to
free sticking ball.
Ram rises and falls during
Leaking discharge valve
Replace pump body.
each stroke
Ram will not close fully
Bent ram
Replace cylinder and ram
assembly.
Air in cylinder
Bleed hydraulic system.
Restriction in hose
Disconnect hose at cylinder and
operate pump handle to flush
out hose.
Ram lock nut assembly against
Turn ram lock assembly to top of
cylinder
ram and tighten retainer screw
on ram lock nut assembly.
Pump stroke partially
Clogged screen
Clean screen.
ineffective
Closed vent assembly
Open vent assembly.
Sticking intake valve ball
Operate pump handle rapidly to
free sticking ball.
Air trapped in pump chamber
Open release assembly and
operate pump handle rapidly
to bleed air from pump
chamber.
Pump handle effort too
Wrong position for socket pin
Reposition socket pin assembly.
high
assembly
Restriction in hose
Disconnect hose at cylinder and
operate pump handle to flush
hose.
Pump handle effort too low
Wrong position for socket pin
Reposition socket pin assembly.
assembly
Sticking intake valve ball
Operate pump handle rapidly to
free sticking ball.
Pump handle snaps back
Clogged screen
Clean screen.
toward pump assembly
Closed air vent assembly
Open air vent assembly.
Sticking intake valve ball
Operate pump handle rapidly to
free sticking ball.
Pump handle creeps toward
Leaking discharge valve
Replace pump body.
pump assembly
Air in pump chamber
Open release assembly and
operate pump handle rapidly
to bleed air from pump
chamber.
3-5
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