Mast/Lift system 7000
Hydraulic telescopic forks
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 15 – 41
15.9.3 Maintenance of telescopic forks
IMPORTANT!
Whenever servicing the telescopic forks, the truck must be turned off
and the battery disconnected.
During maintenance, the hydraulic system must be depressurised.
If the telescopic forks are removed, the forks’ couplings must be
sealed to prevent dirt from entering the hydraulic system.
IMPORTANT!
The forks are replaced as a pair. If one fork is damaged to the extent
that it must be replaced, both forks must be replaced.
1. Lubricate the top of the inner fork as required. Lubricate with calci-
um grease (e.g. Q8 Ruysdael WR2). (a)
2. Check the wear on the forks’ underside and wear plate, particularly
on the back. Check the inner fork as per ISO 5057, with the excep
-
tion of “fork blades and shafts”, as the inner fork is not subject to
wear (b).
3. Check for hydraulic leaks/damage. Examine the cylinder head to
ensure there are no leaks. (This is easy to see once you remove
the outer fork (d)).
4. If the telescopic fork tilt stops are leaking, they must be removed
immediately. If the couplings are leaking, these must be tightened
or replaced. (c)
5. If the wear plate on the underneath of the forks is completely worn,
or if the outer fork sleeve is starting to rub against the wear plate,
the wear plate must be replaced with a new one to prevent damage
to the outer fork sleeves and the inner fork.
6. Once the outer fork has been removed you can easily check the
cylinder head. (e)
b
e
d
a
c
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