Manitowoc Published 05-26-17, Control # 238-02 5-49
MLC165-1 SERVICE/MAINTENANCE MANUAL HOISTS
Adjustment
See Figure 5-33 for the following procedure.
Lower the boom and jib onto blocking at ground level and
adjust each limit switch as follows:
1. Remove the cover (9) from the enclosure (1).
2. Adjust the tension of the spring (3) with the nuts on the
eyebolt (4) so there is enough force to lift the weight of
the chain and rotate the actuating lever (8) up when the
weight is lifted.
3. Loosen the setscrew (5) in the limit switch lever (7) so
the lever is free to rotate.
4. Manually lift the weight to allow the actuating lever (8) to
rotate up.
5. Hold the actuating lever (8) at the Dimension A.
6. Hold the roller on the limit switch lever (7) against the
actuating lever (8) while performing step 7
.
7. Turn the limit switch shaft (6) CLOCKWISE only
enough to “click” the limit switch open and hold.
8. Securely tighten the setscrew (5) in the limit switch lever
(7).
9. Test the limit switch for proper operation and repeat the
adjustment steps until the limit switch operates properly.
10. Install the cover (9) on the bracket (1).
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