(14) Slide outboard bearing (6) from shaft (29).
(6) Install bolt (7) through sprocket (8) and
(15) Separate screws (85), lockwashers (2),
shaft (29), then secure with lockwasher (21) and nut
plate (84), bracket (33), fitting (5), and bushing (87), from
(22).
bearing (6).
(7) Reassemble bracket (33), capscrews (85),
(16) Remove nut (22), lockwasher (21) and bolt
lockwasher (2), and plate (34), on bearing (6).
(7) which secures sprocket (8) to shaft (29), then press
(8) Slide bearing (6) on left end of shaft (29)
sprocket (8) off shaft (29).
then install washer (3), lockwashers (2) and capscrews
(17) Remove fitting (5), coupling (13), and
(1).
nipple (12) from adjusting blocks (11 and 17).
(9) Install eyebolt (26), pin (23), capscrew
(18) Remove bearing (4), fitting (5), and
(16), lockwasher (24), and nut (25) on adjusting block
adjusting bolt (86) from bearing (6).
(11), then install nuts (27 and 28) on eye-bolt (26).
(19) Remove bearing (10) from adjusting block
(10) Slide adjusting block (11) on shaft (29)
(11).
until there is 1/8 inch clearance between sprocket (8)
(20) Remove bearing (18) from adjusting block
hub and the adjusting block (11).
(17).
(11) Slip thrustwasher (15) and sprocket (14)
on shaft (29).
b. Cleaning, Inspection, and Repair.
(12) Repeat step (7) above for adjusting block
(17), then slide adjusting block (17) on shaft (29).
(1) Clean all parts and dry thoroughly.
(13) Position collar (20) on shaft (29) until there
(2) Inspect shaft, bearings, bushings, collar,
is a /s-inch clearance between shaft end and collar, then
thrustwashers, and sprocket for excessive wear, scoring,
install bolt (19), lockwasher (21), and nut (22).
or other damage. Inspect mounting hard-ware for
(14) Position the assembled sprockets and
stripped threads, elongated holes, or other defect.
shaft on crawler frame, then install nut (27) on eyebolt
(3) Repair by replacing damaged or
(26).
excessively worn components.
Replace defective
(15) Install spacer (20, fig. 5-6), bolt (19),
mounting hardware.
lockwasher (86) and nut (88) on carbody (64).
c. Reassembly and Installation
(16) Position bracket (33, fig. 66) on crawler
frame; secure with pin (32) and cotterpin (81).
(1) Install bearings (4, fig. 5-5) and adjusting
(17) Install propel chain (TM 5-3810-201-12).
bolt (86) in bearing (6). Install fitting (5).
(18) Install crawler track (TM 5-810-201-12).
(2) Install bearing (10) in adjusting block (11).
(19) Adjust propel chain and track (TM 5 8810-
(3) Install bearing (18) in adjusting block (17).
201-12).
(4) Install nipple (12), coupling (13), and fitting
(20) Repeat steps (14) through (19) above for
(5) in adjusting blocks (11 and 17).
remaining drive sprocket.
(5) Install key (30) in shaft (29), then press
sprocket (8) on shaft (29) until 61/2 inch distance is
measured from left end of shaft to edge of sprocket hub.
Section IV. CRAWLER IDLER SPROCKET AND IDLER SHAFT
5-9.
General
5-10.
Track Support Rollers
a. Removal and Installation.
The two crawler idler shafts are located at front of
(1) Remove upper track support rollers (TM 5-
crawler, one on either side, and carry the tracks. Both
3810-201-12).
are identical, and are removed or installed in a similar
(2) Remove nuts (49, fig. 5-6), lockwashers
manner. Upper and lower track rollers support track
(50), bolts (4), and mudguard (43) from crawler frame.
around the crawler frame.
5-7
