10
Trouble Shooting
Before you start locating faults, check that the oil flow from the power source is correct and
that the pressure relief valve is set correctly. Follow the instructions in the workshop manual
of the power source.
Problem
Cause
Solution
Post driver does not start, there
is
no
pressure in P-hose
Trigger mechanism does not
actuate trigger piston correctly
Dismount top cover, and check
and adjust functioning.
Post driver does not start, there
is
pressure in P-hose
Striking piston is stuck in
cylinder
Nose part is tightened too hard.
Seizing between cylinder and
striking piston. Polish or replace
components.
Defective Q.R. coupling
Check Q.R. coupling
Oil supply is made to T-
connection
Switch pump and tank line
Adaptor cannot get a grip
around the post during
operation
Adaptor is damaged
Replace parts.
Wrong adaptor size
Replace adaptor to right size.
Post driver works irregularly
Impurities in hydraulic oil
Replace oil and oil filter
Oil level in power source too
low
Add hydraulic oil
Wrong adaptor size or worn out
anvil
Check
Bad performance
Internal leak
Dismount valve housing and
replace O-rings.
Oil flow from the power source
is not correct for the post driver
Check oil flow
Accumulator pressure too low
Charge with Nitrogen.
Defective diaphragm
Replace diaphragm
Defective Q.R. coupling
Check Q.R. coupling
Return pressure too high
Check power source/hoses
Hose diameter too small
Check hoses
