b. Disassembly.
springs, etc.) for wear, elongation of holes, or other
damage. Inspect hydraulic cylinder (para 4-36).
(1) Remove nut (25, fig. 4-18) and bolt (14).
(3) Repair or replace defective components
As bolt is withdrawn remove spacer (19) and springs
d. Reassembly.
(17).
(2) Separate two levers (5) by pulling them off
(1) Position plates (9, and 8, fig. 4-18) on
the adjuster (22). Pull spring seats (18 and 21) and
ends of hydraulic cylinder (10) and install bolts (6),
spring (20) off adjuster (22) then re-move nuts (24 and
lockwashers (11), and nuts (12).
25).
(2) Assemble studs (23), nuts (33), and
(3) To disassemble either of the levers, pull
trunnions (13).
out trunnions (13, 15, and 16) and separate levers (5).
(3) Position trunnions (15) between two of the
Remove nuts (33) from stud (23).
levers (5); trunnion (16) goes in center and trunnions (13
(4) Pull thimbles (7) from hydraulic cylinder
and 15) at ends. Position one trunnion (13) and two
(10). Remove nuts (12), lockwashers (11), and bolts (6),
trunnions (15) between the other two levers (5).
then separate plates (9) and end plates (8) from
(4) Position the lever at each side of hydraulic
hydraulic cylinder (10).
cylinder (10). Position thimbles (7) at ends of cylinder
(5) When necessary, cut rivets (1 and 8) and
(10). Install spacer (19), springs (17), capscrews (14)
remove linings (2) from brake band (4).
and nut (25).
c. Cleaning, Inspection, and Repair.
(5) Install nuts (24 and 25) on adjuster (22).
Assemble spring (20) and seats (18 and 21) on adjuster
(1) Clean all parts and dry thoroughly. Clean
(22) then insert adjuster (22) between levers.
brake lining with a wire brush, then wipe clean with a
(6) If removed, position new lining (2) on
cloth or blow away dirt with com-pressed air.
brake band (4) and secure with rivets (1 and 8).
(2) Inspect all elements of linkage (levers,
Section XV. REVOLVING FRAME AND HOOK ROLLERS
(3) Remove nut (7), lockwasher (8), screw
4-31.
General
(16), and bracket (9) from revolving frame.
The revolving frame is a deep box section of metal
(4) Remove bearing (3) and flatwasher (4)
construction, with rolled steel sidestands welded in place
from bracket (9). Remove fitting (14) from bushing (15),
for machinery mounting. The platform is welded to
then remove bushing (15) from shaft (10).
revolving frame, and covers for the deep box section
(5) Install front hook rollers by reversing
holds slug punching portion of counterweight in place.
procedure in steps (4) through (1) and a above.
The counter-weight extension mounts on rear of
c. Cleaning, Inspection, and Repair.
revolving frame, and the front end attachments mount
their boom at front. The hook rollers, bolted underneath
(1) Clean all parts and dry thoroughly.
revolving frame, hook over roller circle of crawler
(2) Inspect bearings and thrust washers for
carbody, and prevent frame from tipping. The engine
worn or corroded condition. Inspect roller, and eccentric
mounting base is welded to platform at rear of revolving
shafts for out of round or excessive wear. Inspect
frame.
bracket for cracks or breaks.
Inspect mounting
hardware for damage or defect.
4-32.
Front Hook Rollers
(3) Repair rollers by building up with weld and
grinding true. Replace defective rollers beyond repair.
a. Removal and Installation of Front Hook Rollers.
Replace defective bearings, thrust washers, shafts, or
Remove or install front hook rollers (TM 5-3810-201-12).
mounting hardware.
b. Removal or Installation of Front Hook Roller or
d. Adjustment. Refer to TM 5-3810-201-12
Bracket.
for adjustment.
(1) Remove two nuts (6, view A of fig. 4-19),
lockwashers (5), and bolts (18) from bracket (9).
(2) Support weight of bracket (9), then
remove two nuts (7), lockwashers (8), and bolts (17)
from bracket (9).
AGO 20051A
4-27
