TM 9-2320-211-20
interrupted ; e. g., s h i f t i n g t h e c o n t r o l l e v e r t o
b. Installation.
neutral.
(1) Position the switch and secure it with two
b. Adjustment. Tighten the brake adjusting
screws.
screw to obtain a spring compression of 1-
(2) Connect the two electrical leads.
7 / 321 / 32 inch. Do not exceed this adjustment
2-308. Slipring Brush
or the brake band will run hot.
a. Removal.
(1) Remove the caps from the brush holder
and brush assemblies. Remove the brushes.
( 2 ) Remove the four capscrews and lock-
washers securing the brush holder support plate to
the pump support. If necessary, remove the plate
and gasket. Discard the gasket.
c. R e m o v a l .
(1) Remove the six capscrews and lockwashers
holding the automatic brake casecover. Remove the
cover.
(2) Remove the brake adjusting screw from
the brake case. Separate the plain washer and
preformed packing from the adjusting screw.
Discard the packing.
(3) Remove the adjusting screw spring, and
pull the brake band assembly from the brake case.
d. Installation.
(1) Position the brake band assembly and
adjusting screw spring in the case.
(2) Assemble the washer and a new preformed
b. Installation.
packing to the adjusting screw.
(1) If necessary, replace the sliprings.
(3) Tighten the adjusting screw into place, and
(2) Assemble the grommet and wiring
adjust the screw as described in b a b o v e .
assemblies through the brush plate holder.
(4) Secure the cover to the case with six lock-
( 3 ) Connect the wiring. Secure the brush
h o l d e r support plate and gasket to the pump
washers and capscrews.
support.
2-310. Hoist Cable
(4) Position the brush and brush holder
WARNING
assemblies through the support plate. Install the
Always wear gloves when handling wire
caps.
cable. Never let the cable run through bare
2-309. Automatic Hoist Brake Band
h a n d s . Broken wires can cause painful
injuries.
Removal.
a. General. The automatic hoist brake is at-
a.
(1) Remove the cable anchor pin from the
tached to the drive (worm gear) shaft of the hoist
boom head, and remove the crane block assembly
w i n c h gear box and sustains t h e winch load
(fig. 2-257).
whenever the delivery of power to the drive shaft is
