9
7. Fault Location
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
Saw does not start, there is
no
pressure in P-hose
Trigger mechanism does not
actuate trigger piston
correctly
Trigger mechanism is stuck
in valve block
Replace worn parts in handle
See section 9
Dismount trigger from valve
block, and clean or replace
parts
See section 8
Defective Q.R. coupling
Check Q.R. coupling
Saw does not start, there
is
pressure in P-hose
Oil supply is made to
T-connection
Switch pump and tank line
Safety trigger does not work Spring is too slack
Replace spring, see section 9
Impurities in hydraulic oil
Replace oil and oil filter (see
workshop manual of power
source)
Saw works irregularly
Oil level in power source too
low
Add hydraulic oil
Internal leak
Dismount valve housing and
replace O-rings, see section 10
Oil flow from the power
source is not correct for the
saw
Check oil flow
Defective Q.R. coupling
Check Q.R. coupling
Return pressure too high
Check power source/hoses
Hose diameter too small
Check hoses
Bad performance
Trigger piston not fully
activated
Replace worn parts in handle
See section 9
