MHD56114 - Edition 4
33
8.
Install thrust washer (35) and output gear carrier (36) in
housing (48). Align with intermediate sun gear (39). Take
care not to damage teeth on either part while installing.
9.
Align holes in cover (34) with housing (48) and secure with
capscrews (33). Torque to 60 ft lbs (81 Nm).
10. With drum standing on end, place reduction gear assembly
into drum. Place Loctite
®
515 on mating surfaces of housing
(87) and end cover. Align the 3/8 inch NPT holes in the end
cover with counterbore marks on the housing mating flange.
Secure in place by evenly installing sixteen capscrews (33).
Torque capscrews to 60 ft lbs. (81 Nm).
11. Cover the reduction gear to prevent dirt and contaminants
from entering assembly and place in a safe place until ready
for assembly to winch uprights.
Winch Assembly
Refer to Dwg. MHP0950 on page 40.
NOTICE
• Unless otherwise stated capscrew torque values listed are for
lubricated or plated threads. This assembly uses “blue bolts”
in numerous locations. These are plated and should not be
lubricated.
1.
Using a hoist, support the drum.
2.
Install bearing (30) in inboard (motor end) upright (68).
With oil seal (29) lip facing towards the motor, install oil
seal in inboard upright.
3.
Install output shaft (28), bearing (30) and oil seal (29) in
outboard upright (26). Oil seal lip must face toward the
brake. Install the outboard upright onto drum by aligning
splines of output shaft to reduction gear output carrier
assembly splines.
4.
If equipped with automatic drum brake, install the drum
band brake bracket and piston assemblies. Do not attach the
brake band assembly (104). Refer to the ‘Drum Band Brake’
section for instructions.
5.
Install coupling (60) on drive shaft (61) and install on end of
the input sun gear (54), located in the reduction gear
assembly.
6.
If equipped with automatic drum brake, place brake band
assembly (104) onto drum brake flange. Place inboard
(motor end) upright (68) on drum.
7.
For standard winch:
loosely attach the side rails (64) and
(65) to the uprights (26) and (68) using four capscrews (66)
for each side rail. Tighten capscrews and torque to 75 ft lbs
(102 Nm) for dry threads, or 55 ft lbs (75 Nm) if thread
lubrication is used.
8.
For Open Frame (Face) winch:
Refer to Dwg. MHP1324
on page 60. Loosely attach the rear side rail (64), using four
capscrews (66) to uprights (26) and (68).
a.
If noted during disassembly, place washers (584), in
quantities and locations recorded, and bars (570)
between side rails (571) and (573). Secure using
capscrews (572) and torque to 150-175 ft lbs (203-237
Nm). Go to step 8.c.
b.
If washer (584) locations and quantities were not
recorded, loosely attach side rail (571) to upright (26)
and side rail (573) to upright (68) using capscrews
(574). Using washers and bars (570), determine the
correct arrangement of washers required to ensure side
rails are even with drum (62) flange edge. The washers
(584) must be evenly distributed with an equal number
located on each end of the bars. Once quantities are
determined, remove the side rails and reassembly as
described in step 8.a.
c.
Place open frame assembly onto uprights (26) and (68).
Ensure side rail (571) is located on upright (26) and side
rail (573) is located on upright (68). Place washers (585)
on capscrews (574) and secure frame assembly to
uprights. Torque capscrews to 75 ft lbs (102 Nm).
d.
Secure rear side rail (64) to uprights, torque capscrews
(66) to 75 ft lbs (102 Nm).
9.
Align holes in motor adapter (71) and install on upright.
Secure with six capscrews (73). Torque capscrews to 125 ft
lbs (170 Nm) for dry threads, or 95 ft lbs (129 Nm) if thread
lubrication is used.
10. If equipped, attach band brake assembly (104) as described
in the ‘Drum Band Brake Assembly’ section.
Disc Brake Assembly
Refer to Dwg. MHP0630 on page 44.
1.
Install bearing (21) into support plate (19) and secure with
retainer ring (22).
2.
In this order, place spacer (11), sprag clutch (16), outer race
(12) and spacer (11) on inner race (10). Test sprag clutch
operation. Refer to Dwg. MHP0667 on page 34.
NOTICE
• Correct sprag clutch installation prevents clockwise rotation
(brake engages) and allows counterclockwise rotation when
viewed from the end cover (2) end of the brake assembly.
WARNING
• Incorrect assembly of the sprag clutch will adversely affect
winch operation. In haul-in operation, sprag clutch will be
engaged resulting in restricted winch operation. In neutral
and payout positions, the sprag clutch can rotate resulting in
brake not holding load. Ensure the sprag clutch is correctly
installed.
3.
Install assembly on support plate (19).
4.
Install twelve springs (17) in holes on inside of support plate
(19).
5.
Install gasket (18) and pressure plate (15).
6.
Determine correct alignment of end cover (2), housing (6)
and support plate (19) by checking matchmarks placed
during disassembly, or by placing housing on support plate
and matching capscrew holes.
7.
Correctly align with dowel slots on the housing (6) and
install six separator plates (14) and five friction plates (13) in
the following order:
a.
Begin with a separator plate, followed by a friction
plate. Alternate plates. Refer to Dwg. MHP1011
on page 34.
WARNING
Failure to correctly arrange friction and separator plates will
result in erratic brake operation. Sudden brake applications
may cause winch and/or wire rope damage resulting in a
falling load.
