HOISTS 777 SERVICE MANUAL
5-10 Published 10-01-2012, Control # 045-08
Adjustment
See Figure 5-8 for following procedure.
Lower the boom onto blocking at ground level and adjust
each limit switch as follows:
1. Adjust spring tension so there is enough force to lift the
weight of the chain and rotate the actuating lever when
the weight is lifted.
2. Loosen the setscrew in the limit switch lever so the lever
is free to rotate.
3. Manually lift the weight to allow the actuating lever to
rotate upward.
4. Hold lever at Dimension A.
5. Hold the roller on the limit switch lever against the
actuating lever while performing step 6
6. Turn the limit switch shaft clockwise only enough to
click limit switch open and hold. Then securely tighten
the setscrew in the limit switch lever.
Test the limit switch for proper operation (see Maintenance);
repeat the adjustment steps until the limit switch operates
properly.
Dimension A
1.04 in. (26 mm)
A1007
FIGURE 5-8
Left Hand Shown
Right Hand Opposite
Item Description
1Roller
2 Limit Switch Lever
3 Shaft
4 Cover
5 Elbow with Cable Gripper
6 Setscrew
7Spring
8Enclosure
9 Adjusting Screw
(spring tension)
10 Grease Fitting
11 Actuating Lever
1
2
3
4
5
6
7
8
9
10
11
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