Troubleshooting
Symptom tables
Publication No. Date Valid from serial number T-code
261828-040 2008-08-21 6051502 815, 816
© BT Repair Manual RRE140/160/180/200/250 7 – 39
7.4.2 Telescopic forks
Error Cause Action
The forks run in and
out unevenly
The hydraulic hoses are incorrectly
connected
Connect the hydraulic hoses
The four hoses are not the same
length
Dirt between inner and outer forks Remove the dirt
Leakage at the piston seal Replace the piston seal
The distribution valve is damaged Replace the distribution valve
The forks move with-
out the levers being
operated
Leak in the regulator valve Check as below
The forks are leaking
oil
Couplings are leaking Correct fitting or replace cou-
plings
The cylinder head seal is damaged Replace the cylinder head seal
The fork is worn Immediately remove the forks
from the truck
The forks shake dur-
ing extension and re-
traction
The regulator valve/pump is worn
Insufficient flow
Check as below
One of the outer
forks does not retract
The bolt is broken or loose Replace or tighten the bolt with
Loctite 542
The fork tips are no
longer at the same
height
One of the forks has been overloaded
and has become permanently
deformed
Remove the forks from the
truck
Check as below
Too great a tolerance
between the inner
and outer fork
The outer forks are worn or have been
overloaded, resulting in the underside
of the outer forks becoming perma
-
nently deformed
Replace the outer forks
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