4-29. Rear Winch Assembly. - Continued
f. Repair. Model PG-115-043R
DrY cleaning solvent PD-680 used to clean parts is potentially dangerous to personnel and property.
Avoid repeated and prolonged skin contact. Do not use near open flame or excessive heat. Flash point
of solvent is 100-138 °F (38-60 °C).
Do not dry or spin bearings with compressed air. Allow bearings to air dry after cleaning.
(1) Clean all items, except seals and preformed packings, with dry cleaning solvent, and dry thoroughly.
(2) Inspect all items for cracks and replace as needed.
Replace worn gears and shafts as a set. Minor Scratches, surface roughness, and rust can be removed
from finished surfaces.
(3) Inspect all items for wear, refer to table 4-4 for repair and replacement limits, and replace all items that are
worn or otherwise damaged.
g. Reassembly. Model PG-115-043R. (figure 4-23)
Install backup plate (75) in brake cylinder (68).
Alternately install brake discs (73) and (74) making sure all teeth line up, and metal brake disc (74) is last
Backup rings are installed away from pressure cavity.
install packing (71) and backup ring (72) in brake cylinder (68).
Install packing (70) and backup ring (69) in brake cylinder (68).
Install brake piston (67) in brake cylinder (68).
There are 24 holes in brake piston but only 16 springs.
pressure on brake piston.
(6) Install 16 springs (66) in brake cylinder (68).
Install springs in an even pattern to prevent uneven