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Malfunction
Air in the pump.
Air in the circuit
Damaged cylinder gaskets
Damaged or worn pump
Cylinder moves
Sequence valve jammed
slow
Delivery oil line clogged or
choked
Electric motor will not turn
Piston gaskets completely
Piston will not
Damaged
move
Blocked distributor
Damaged pump
Head gaskets damaged or worn
Cylinder leaks oil
Lack of pressure from pump
Piston ram will not
Pressure control valve set low
build pressure
Filter Suction clogged
Pump Cavitation
Fluid too viscous
Fluid level too low
Fluid unsuitable
Foam forms in the
Fittings or joints let air in
fluid
Air discharge in the circuit
Worn or damaged
Pumps
Operating instability
Pressure relief
valves
Pumps worn or damaged
Pumps deliver little
or no oil
Pump joint broken or undone
Pump will not turn
Valve seat damaged
Unstable valves
Pressure not constant
Dirty fluid
Valve parts
jammed
Lack of pressure from the pump
Pressure adjustment valve set
low
Piston moves
The translating cylinder is
irregularly or will
damaged
not move
Translating wheels or guides
dirty or blocked
Oil containing abrasives
Insufficient lubrication
Excessive wear on
High operating pressure
parts
Foreign bodies in the oil not held
back by the filter
Force 40 70 100 150 Ton
Origin
Bleed the air
Bleed the air
Replace the gaskets
Replace the pump
Recondition seq. valve
Check hydraulic lines
Check motor
Replace
Recondition distributor
Recondition or replace
Replace
Recondition pump
Set valve
Clean or replace
Replace
Bring back up to correct level
Replace with suitable fluid
Replace or tighten fittings
Discharge the remaining air from the
system
Recondition or replace
Replace or recondition
Replace and recondition
Check or replace
Replace or recondition
Check pump or pressure relief valve
Drain off fluid clean system and
components refill with clean and filtered
fluid
Recondition the pump
Set the valve
Check and recondition
Clean or replace parts
Replace the fluid
Poor quality oil
Lowe the setting of the pressure relief
valve
Insufficient filtering, replace the filters
14
Remedy
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