Maintenance
132
C3M2-OM-EN-02
Mast Chain Adjustment
The chains connecting the mast stages must be adjusted in such a way as that the
vertical mast channels are approximately flush with each other at the bottom and not
in contact with the bottom plate when the mast is unloaded 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.
Raise the mast fully and check that a clearance of at least 1mm exists between the
end of run stops ([A] and [B] in figure 6.16.1 and figure 6.16.2) on each of the mast
stages.
Fork Carriage Chain Adjustment
The chains connecting the fork carriage to the mast stages must be adjusted so that
the upper and lower end of run stops never make contact.
To set the clearance between the lower stop on
the fork carriage (A) and the corresponding
lower stop on the mast (B), remove the forks
and lower the fork carriage fully. Adjust the
chain anchors so that there is a clearance of
approximately 5mm between the stops.
To set the clearance between the upper stop
on the fork carriage (A) and the corresponding
stop on the mast (B), remove the forks and
raise the fork carriage fully. Adjust the chain
anchors so that there is a clearance of
approximately 1mm between the stops. When
the forks and a load are present the clearance
will increase to a desired value of
approximately 5mm.
B
Caution
If the lower stops are allowed to collide they will warp and the lower
bearings on the mast carriage will come out of the mast channel.
If the upper stops are allowed to collide excessive forces will be placed on
the chains and the free lift cylinder resulting in premature failure.
A
Figure 6.16.1
B
A
Figure 6.16.2
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