(2) Cut wire (5) and remove capscrews (6),
(3) Install spacers (13 and 30), and bearing
spacer (30), retainer plate (7), and bearing retainer (8)
housing (18) on shaft (15), then press bearing (9) on
from shaft (15).
shaft (15).
(3) Press bearing (9) off shaft (15).
(4) Position bearing retainer (8), retainer plate
(7), and spacer (30) on shaft (15) and secure to bearing
(4) Remove bearing retainer (12) and spacers
enclosure with capscrews (6), and wire (5).
(13) and (30) from shaft (15).
(5) Install keys (14) and gear (4) on keyed end of
(5) Remove fitting (11), coupling (22), and nipple
shaft (15).
(21) from elbow (20).
e. Installation.
(6) Remove elbow (20) from nipple (19) then
remove nipple from bearing housing (18).
(7) Remove bearing housing (18) from frame,
(1) Raise shaft to sidestand and drive it through.
then remove bearing (29) from housing (18).
Position gear (11, fig. 4-6) and spacer, drive shaft (15,
c. Cleaning, Inspection, and Repair.
sidestand on revolving frame (12, fig. 4-6).
(2) Install lockwasher (25, fig. 4-8) and bearing
(1) Clean all parts and dry thoroughly.
nut (26) on threaded end of shaft (15).
(2) Inspect shaft for burred splines or excessive
Tighten nut as necessary to obtain proper alinement of
wear; bearings for excessive wear or other damage;
intermediate idler shaft gears with meshing gears of
gears for broken, cracked or chipped teeth, and spacers,
jackshaft and main drum shaft.
seals, or retainers, for any damage or defect. Inspect
mounting hardware for burrs, elongated holes, or other
(3) Install bearing retainer (27), lockplate (28)
defect.
and secure with capscrews (17), lockwashers (23), and
(3) Repair by straightening bends, welding
nuts (24).
cracks, or replacement of defective parts or mounting
(4) Install capscrews (6) and wire (5) securing
hardware.
retainer plate (7).
(5) Position collar (12, fig. 4-5) on idler gear (11)
d Reassembly.
and secure with two lockwashers (13) and capscrews
(14).
(6) Lubricate in accordance with LO 5-3810-201-
(1) Install nipple (19, fig. 4-8) and elbows (20)
12.
on bearing housing (18).
(7) Install hoist gear guard (TM 5-3810-201-12).
(2) Install nipple (21), coupling (22) and fitting
(8) Start engine, then raise boom (TM 5-3810-
(11) on elbow (20).
201-12).
Section VII. MAIN DRUM (HOIST) SHAFT
(3) Remove the gantry (para 28).
4-14. General
(4) Remove necessary dirt or gear guards (TM
5-3810-201-12).
The main hoist shaft is located at front of the sidestand
(5) Remove the six capscrews (1, fig. 4-5)
on revolving frame. The shaft includes boom hoist, main
securing shaft end cap (2) to outboard bearing support
hoist, and digging drums. Also on this shaft are the drum
(17). Remove the bearing retainer.
operating brakes and clutches, plus the auxiliary
(6) Remove cotterpin (6, sheet 1 of fig. 4-9), nut
clutches. Driving power comes from engine through
(5), and washer (7) from shaft (77, sheet 2 of fig. 4-9).
jackshaft and a gear on the intermediate shaft which
(7) Remove the auxiliary hoisting and digging
meshes with gear on main shaft.
clutches (TM 5-3810-201-12).
4-15. Main Hoist Shaft
NOTE
a. Removal.
(1) Remove cables from drums on main shaft,
When removing main hoist shaft
and the crowd and retract chain from shovel front end
from a crane-shovel unit that has
attachments (TM 5-3810-20112).
been, or is
(2) Remove the cab (para 2-7).
4-12
