7
6. Fault Location
Problem
Cause
Solution
Pressure relief valve may be
clogged up or defective
Dismount pressure relief valve
and clean with compressed
air, or replace the valve
Earth drill is difficult to hold,
keeps turning
Wrong adjustment of
pressure relief valve
Adjust pressure relief valve
correctly
Hydraulic oil is leaking at
the valve block
Worn seals in the seal
housings on the valve block
Replace worn seals.
See section 8
Earth drill does not start to
drill, even though the
trigger lever is fully
activated
Wrong adjustment of
threaded rod between trigger
lever and trigger
Adjust threaded rod between
trigger lever and trigger.
See section 8
Earth drill does not rotate
forwards/reverse
Wrong adjustment of
threaded rod between trigger
lever and trigger
Adjust threaded rod between
trigger lever and trigger.
See section 8
Dirt in pressure relief valve
Dismount pressure relief valve
and clean with compressed
air
Wrong adjustment of
pressure relief valve
Adjust pressure relief valve
correctly
Earth drill does not work
satisfactorily, or
performance is too weak
Power source performance is
too low
Check the power source
