WALTERSCHEID HOLHS, Mounting And Operating Instructions

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14
6. TROUBLESHOOTING
Fault Cause Elimination
Locking mecha-
nism cannot be
opened.
Coupling points
distorted.
Set the top link
to the load-free
length by actu-
ating the control
valve.
Locking mecha-
nism does not
engage.
Dirt accumula-
tion inside the
hook
Clean the hook
(see service
notes).
Spring broken. Replace the
spring immedi-
ately.
Release cord
taut.
Check the cord
guidance/
length; correct, if
necessary.
Unit-side bolt
nuts cannot be
removed.
Coupling points
distorted.
Set the top link
to the load-free
length by actu-
ating the control
valve.
Leak.
Oil loss on
fittings.
Fittings worked
loose.
Retighten the
fittings.
Tightening
torque of the
hollow bolts on
the check valve:
80 Nm.
Leak.
Oil loss on piston
rod.
Seals worn. Have the seals
replaced in a
specialist work-
shop.
Leakage on the
tubing.
Defective tubing. Replace the
tubing.
Change in length
under load after
a short standstill.
Piston seal worn. Have the seal
replaced in a
specialist work-
shop.
Check valve
defective
Replace check
valve
Fault Cause Elimination
Shock absorber
not functioning.
No nitrogen. Filling the pres-
sure chamber
by specialist
agricultural and
construction
machinery work-
shops.
Defective com-
ponents.
Replacing the
complete piston
rod with shock
absorber.
Top link is com-
pletely extended.
Change top link
settings (retract
at least 30 mm).
Top link is com-
pletely retracted.
Reduce drive-in
distance
Nitrogen availa-
ble. Incorrectly
filled.
Pay attention to
pressure equa-
lisation. Ensure
that the check
valve is released
when filling.
Too much nit-
rogen.
Have the
pressure and
gas fill quantity
adjusted by a
specialist work-
shop.
Locking device
for the bolt nuts
is missing.
Incorrect / defec-
tive assembly.
Install a new
coiled spring pin.
Connection bet-
ween the hook
and ball is no
longer secure.
Wear. Check the ball,
hook and locking
pin for wear
and replace if
damaged.