23
8.
When removing ball bearings from shafts, it is best to use a
bearing puller. When removing bearings from housings,
drive out the bearing with a sleeve slightly smaller than the
outside diameter of the bearing. The end of the sleeve or
pipe which contacts the bearing must be square. Protect
bearings from dirt by keeping them wrapped in clean
cloths.
Thermoplastic Coated Parts Disassembly
Thermoplastic coating on capscrew heads, nuts, housings and
other components can be removed as follows:
CAUTION
• Separate parts using proper tools. Ensure machined
surfaces are not damaged during disassembly.
1.
Fasteners:
a.
Push tool into or over fastener, forcing coating off of
the fastener.
b.
If coating is too thick, then heat the fastener to soften
coating. Socket or wrench will push softened coating
off, allowing removal of part.
c.
For socket head capscrews, setscrews, etc., heat the
component until coating is softened. Use a small
screwdriver or similar tool to remove coating to allow
access for wrench.
2.
For housings, plates and other coated mating components
use a sharp knife or similar tool to cut through coating
around mating area of components.
Drum Guard Disassembly
Refer to Dwg. MHP0658.
1.
Remove capscrews (592).
2.
Remove brackets (591) and (595) by sliding out of drum
guard (590).
3.
Remove drum guard (590) from rear (drum brake side)
sideframe (64) carefully. By design the drum guard attaches
to the sideframe using tabs. The smaller, upper tabs are
visible on the top of the sideframe. The longer, lower tab is
located beneath the sideframe edge. During removal care
must be taken not to bend the tabs. To correctly remove, at
the point where the drum guard and the sideframe meet,
push, or tap the lower portion of the drum guard in towards
the winch drum (62). The direction of force should be
directly away from the sideframe. Do not pull ‘up’ or
‘down’ as the tabs may become deformed.
Winch Disassembly
Refer to Dwgs. MHP0947, MHP1310 and MHP1313.
1.
Remove the wire rope from the drum. Remove wire rope
anchor (63) and store for reassembly.
2.
Relieve pressure in the air lines and winch air components
by operating the winch control several times after the air
supply has been turned off.
WARNING
• Shut off, bleed down and disconnect the air supply line
before performing any disassembly procedures.
3.
Disconnect and tag the air lines.
4.
To drain oil refer to “LUBRICATION” section.
5.
Remove the fasteners securing winch to its foundation and
move the winch to a suitable work area before beginning
disassembly.
WARNING
• The air motor weighs approximately 100 lbs. (45.3 kg).
Adequately support the air motor before removing the motor
mounting capscrews.
6.
Remove the four capscrews (221) securing the motor
assembly to the motor adapter (71). Using a hoist to
support the motor, pull the motor straight away from the
winch. Refer to the ‘Motor Disassembly’ section if motor
disassembly is required.
7.
Remove drive shaft (61) and coupling (60).
8.
Disconnect drum band brake. Remove drum guard and any
other externally mounted winch attachments. Refer to the
applicable section for disassembly instructions.
CAUTION
• There are a total of eight capscrews securing the brake
cover to the brake housing. Two of these capscrews hold the
brake assembly together, but do not attach to the outboard
upright. One capscrew attaching the brake assembly is
located directly beneath the brake air line fitting connection;
the other is located 180 degrees from the air fitting. The
heads of these two capscrews sit deeper into the counterbores
of the brake cover. Do not remove these two capscrews until
the brake has been separated as an assembly from the winch
and the directions in the ‘Disc Brake Disassembly’ section
have been reviewed.
9.
Disconnect and remove brake hose (75). Remove six
capscrews (1) attaching disc brake assembly to outboard
upright (26). Remove disc brake assembly by tapping
around housing with a soft hammer or mallet while pulling
out and away from upright in a horizontal direction.
Remove dowel pin (20) and store until re-installation. To
further disassemble the disc brake assembly, refer to Dwg.
MHP0947 and the ‘Disc Brake Disassembly’ section.
10. Using a hoist to support the drum, remove sideframes (64)
and (65), one at a time, by removing four capscrews (66)
attaching each sideframe to uprights (26) and (68).
11. Remove the inboard (motor end) upright (68) by pulling
straight away from drum (62) in a horizontal direction.
Remove oil seal (29) and bearing (30) from upright.
Discard oil seal. Discard bearing if inspection indicates
replacement.
12. Remove the automatic drum band brake assembly (104), if
equipped, by sliding over the end of the drum (62) flange.
To further disassemble the drum brake, refer to ‘Drum
Band Brake Disassembly’.
13. Remove the outboard (disc brake end) upright (26) by
pulling straight away from drum (62) in a horizontal
direction. Remove oil seal (29) and bearing (30) from
upright. Discard oil seal. Discard bearing if inspection
indicates replacement.
