(5) Install four bolts (16) and nuts (15) and
(8) Install auxiliary hoisting and digging drum
secure outboard bearing support (17) to bearing bracket
clutches (TM 5-3810-201-12).
(18) on sidestand (10).
(9) Install boom hoist and digging brakes and
(6) Position bearing cap (6, fig. 44) on bearing
planetary clutch bands (TM 5-3810-201-12).
cap (10) and secure with bolts (3), lockwashers (5), and
(10) Install necessary dirt and gear guards (TM
nuts (4).
5-3810-201-12).
(7) Install retainer (7) on right end of shaft and
(11) Install gantry (para 2-8).
secure with six lockwashers (8), and capscrews (9).
(12) Install cab (para 2-7).
(13) Reeve cables (and crowd chain, if operating
as a shovel) (TM 5-3810-201-12).
NOTE
(14) Before operation adjust all brakes and
clutches (TM 5-3810-201-12).
Dipper trip mechanism will be
(15) Perform preventive maintenance checks
installed in step (7), if unit is
and services.
operating as a shovel (TM 5-3810-201-
12).
Section VIII. HOISTING, DIGGING, AND AUXILIARY CLUTCHES
(2) Inspect all parts for damage, defect, or signs
4-16. General
of wear. Check spring tension.
The hoisting and digging clutches on main drum (hoist)
(3) Repair by replacing defective parts, or worn,
shaft are identical except for clutch lever. The lever on
lining segments.
digging drum clutch spider is the opposite of that on hoist
drum clutch spider at right end of shaft. Two auxiliary (or
d. Reassembly.
booster) clutches are installed on main shaft to energize
hoisting and digging clutches. Auxiliary clutches are
(1) Install new lining segments (88, fig. 4-10) on
identical, and hydraulic cylinders in both are connected to
clutch shoes (19).
header in the lever stand.
(2) Install two sleeve bearings (45) in link (43)
and two sleeve bearings (49) in lever (12).
4-17. Hoisting and Digging Clutches
(3) Position link (43) on auxiliary clutch drum
(62) and secure with pin (46) and cotterpin (47).
a. Removal. Remove hoisting and/or digging clutch
(4) Position lever (12) then install pin (50) and
(TM 5-3810-201-12).
secure with cotterpin (8).
b. Disassembly.
e. Installation. Install remainder of hoisting and/or
digging clutch on main drum (hoist) shaft (TM 5-810-
(1) Remove cotterpin (8, fig. 4-10) and pin (50),
201-12).
then lift lever (12) from clutch.
(2) Remove cotterpin (47) and pin (46), then lift
4-18. Auxiliary (or Booster) Clutches
link (43) from auxiliary clutch drum (62).
(3) Remove two bearings (45) from link (43),
a. Removal. Remove auxiliary clutches from main
then remove two bearings (49) from lever (12).
hoist shaft (TM 5-3810-201-12).
(4) When clutch shoe lining segments (38) are
worn to within 1/16 inch of rivet (89) head, remove rivets
b. Disassembly or Reassembly. Remove rivets (5,
and lining segments from clutch shoes (19).
segment (7), when worn to within 1/16 inch of rivet head.
c. Cleaning, Inspection, and Repair.
Reassemble in reverse order.
(1) Clean all metal parts and dry thoroughly.
c. Installation Install auxiliary clutches on main hoist
Clean glaze or discoloration from brake lining 4-16 with a
shaft (TM 5-3810-201-12).
wire brush, then wipe with clean cloth or blow off dirt with
low pressure compressed air.
4-16
