Drive Chain Tensioning; Wire Rope Assembly - Uniforest 45H Instructions For Use Manual

4. Drive chain tensioning

After a certain period of operation (10 hours), the drive chain stretches; therefore it must
be checked frequently and tensioned, if required. It must be checked every 500 hours of
operation or once every year. Tensioning is done according to the following procedure
(figure 12)! First, disengage the PTO shaft and turn off the engine. Remove the protective
sheet of the PTO shaft (pos 1, figure 12). Loosen the nuts (pos 2 and pos 8, figure 12) which
fix the lower and upper drive (pos 3 and pos 9 figure 12). Then, unwind the safety nut (pos
12, figure 12) and using the screw (pos 13, figure 12) begin tensioning the longer chain
(pos 6). Turn this screw to the right until the chain is properly tensioned. The chain is
properly tensioned, when there is a swing of the chain for approximately 3-4 mm in
transversal direction. Then tighten the screw with the counter-nut (pos 12, figure 12) to
prevent the tensioner to get loosened. Now, securely tighten all four nuts on the lower
drive (pos 2, figure 12). Then begin tensioning the shorter chain (pos 7, figure 12). If the four
nuts (pos 8, figure 12) have been loosened beforehand, loosen the nut (pos 11, figure 12)
and begin turning the tensioning screw (pos 10, figure 12) in left direction. This increases
the distance between both housings. When the chain (pos 7, figure 12) is correctly
tensioned, retighten the nut (pos 11, figure 12). At the end, similarly retighten nuts (pos 8).
Figure 12

5. Wire rope assembly

First, remove the triangular protective net on the winch column. Then rotate the cover
(pos. 7, figure 11) and rotate the drum in a position, which enables unscrewing of the bolt
(pos. 8, figure 11)on the drum. Insert the wire rope in the guide of the upper pulley and
direct it through the upper pulley to the rope drum. Insert the rope in the groove and
tighten the bolt (pos. 8). Then start to wind according to the procedure, which applies to
towing. Once the entire length of the wire rope is wound, unwind it again and wind it
again strongly according to the procedure, which is described in the chapter "Wire rope
unwinding" to prevent damage to the rope.
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