Maintenance
105
C2500CB-OM-EN-16
Mast Chain Adjustment
The chains connecting the mast stages must
be adjusted in such a way as that the inner
vertical mast channel (
A
) and the middle
vertical mast channel (
B
) are approximately
flush with each other at the bottom and not in
contact with the bottom plate (
C
) when the mast
is loaded and fully lowered.
To adjust a mast stage, tighten or loosen the
adjusting nut on one of the chain anchors to
achieve the desired dimension. Adjust the
opposite chain of the pair to achieve equal
tension in the chains.
Fork Carriage Chain Adjustment
The chains connecting the fork carriage to the inner mast stage must be adjusted so
that the lowest point on the bottom of the forks is approximately 1mm off the ground
when the truck is parked on a smooth level surface with the mast fully lowered and
tilted forward fully.
To adjust the fork carriage height, tighten or loosen the adjusting nut on one of the
chain anchors to achieve the desired dimension.
Chain Tension Adjustment
The chains on the mast must be adjusted so that each chain acting as one of a pair is
under equal tension to the opposite chain in the pair for proper load distribution and
mast operation.
Checking and Setting the Chain Tension
1. With the mast unloaded raise the sections to put the chains under tension.
2. Press the centre of a strand of chain with a suitable rod and then press at the
same place on the opposite chain of the pair.
3. Each chain in a pair should have equal “give”.
4. If the tension is not equal, tighten the bolt on the anchor of the slack chain.
5. Test the tension again. Adjust until the tension is equal.
Caution
Never place hands inside the mast to check chain tension.
A
B
C
