Manitowoc NATIONAL CRANE 900A - Wireline Jib Min. Angle Switch; Adjustment

2-20

Wireline Jib Min. Angle Switch
Adjustment
1. Elevate the boom to 80°.
2. Set HCA Selector Switch to Jib position.
3. Boom down very slowly until the Jib Compensat-
ing Pressure Switch trips.
4. Remove the Junction Box Cover.
5. Ensure that the Mercury Switch retainer is firmly
attached to the Junction Box.
6. Loosen the Junction Box Mounting Screws and adjust
the angle of the junction box.
a. Adjust the angle of the Mercury Switch
Junction Box Assembly to achieve 75° boom
angle
b. Tighten the mounting screws
7. Repeat steps 5 and 6 until 75° boom angle is achieved.
8. Replace the Junction Box Cover
X
Z
!'6x'$K$
X82& Z8x'$K
!'6'4$&%('$6$
X8x'$K!'$4^$4j
Z84$&!'$ [8!')4$&
X
Z
[



























Reference Only