(b) Tap bearing (18) into the drum until it
(13) in place on the retainer. Secure retainer with screws
is firmly seated against the drum shoulder. Turn drum
(5) and lock washer (6).
over and finish packing the drum cavity with grease.
Carefully slide spacer (9) into position
Install bearing (15) in this end of the drum. Place spacer
against bearing (11). Using a suitable hoist, lift the as-
(16) on top of bearing (15).
sembled drum and install it as an assembly on the right
(c) Install oil seal (14) in drum (17). Pack
end of the shaft.
seal with type GAA grease and be sure the sealing lip
(11) Refer to TM 5-3810-295-12 and perform
the following operations:
(d) Install pinions (1) in drum (4) and
(a) Install boom hoist brake band and
position drum (4) on drum (17).
adjust as instructed.
(e) Lubricate packing () and install them
(b) Install boom hoist clutch and adjust as
on pinion pins (2). Install pins (2) in pinion (1). Turn pins
so that the flats on the outer ends of the pins allow bear-
(c) Open hydraulic reservoir shut of valve
ing retainer (7) to be installed. Install oil seal (8) in
and bleed hydraulic lines to the boom hoist clutch and
bearing retainer (7). Be sure the sealing lip points in-
boom hoist brake.
ward, and pack the seal with type GAA grease as de
(d) Install rear drum chain case and the
scribed in the current LO 5-3810-295-12 (series).
rear drum drive chain and adjust chain tension as in-
(f) Warm and install bearing (15) on the
elongated hub of planetary clutch hub and gear (12).
(e) Adjust horizontal swing shaft chain
Warm and install bearing (11) on the opposite end of
tension. Be sure all chains are properly mounted on all
planetary hub and gear (12). Install packing (10) on
sprockets before tightening eccentric adjusting shafts.
planetary hub and gear (12).
Install chain access cover.
(g) Install planetary clutch hub and gear
(12) with bearings (15) and (11), and packing (10) on
Be sure no hydraulic fluid comes into contact
planetary clutch hub and gear (12).
with brake clutch linings during repair.
(h) Install retainer (7) with grease fitting
REPAIR OF REAR DRUMSHAFT
The rear drumshaft is used two ways: 1) as the second-
The rear drumshaft is removed as an assembly in
ary load line during crane type operation, and 2) as the
accordance with paragraph 2-12.
hoist drum for digging operations. The drumshaft is
driven from the boom hoist shaft through a double-strand
roller chain, located in the rear drumshaft drive
chaincase on the left rear of the crane. (Refer to fig.5-1.)
Rear drumshaft disassembly is shown in figure