TM 5-3810-206-35
(6) Install bolt (7) through sprocket (8) and shaft
(17), then slide adjusting block (17) on shaft (29).
(29), then secure with lockwasher (21) and nut (22).
(13) Position collar (20) on shaft (29) until there
(7) Reassemble bracket (33), capscrews (35),
is a 1/8 inch clearance between shaft end and collar,
lockwasher (2), and plate (34), on bearing (6).
then install bolt (19), lockwasher (21), and nut (22).
(8) Slide bearing (6) on left end of shaft (29)
(14) Position the assembled sprockets and shaft
then install washer (3), lockwashers (2) and capscrews
on crawler frame, then install nut (27) on eyebolt (26).
(1).
(15) Install spacer (20, fig. 5-6), bolt (19),
(9) Install eyebolt (26), pin (23), capscrew (16),
lockwasher (36) and nut (38) on car body (54).
lockwasher (24), and nut (25) on adjusting block (11),
(16) Position bracket (33, fig. 5-5) on crawler
then install nuts (27 and 28) on eyebolt (26).
frame; secure with pin (32) and cotterpin (31).
(10) Slide adjusting block (11) on shaft (29) until
(17) Install propel chain (TM 5-3810-206-12).
there is !/8 inch clearance between sprocket (8) hub and
(18) Install crawler track (TM 5-3810-206-12).
the adjusting block (11).
(19) Adjust propel chain and track (TM 5-3810-
(11) Slip thrustwasher (15) and sprocket (14) on
206-12).
shaft (29).
(20) Repeat steps (14) through (19) above for
(12) Repeat step (7) above for adjusting block
remaining drive sprocket.
Section IV. CRAWLER SPROCKET AND IDLER SHAFT
5-9.
General
5-11. Crawler Idler Sprocket and Idler Shaft
The two crawler idler shafts are located at front of
a. Removal and Installation.
crawler, one on either side, and carry the tracks. Both
(1) Remove crawler track (TM 5-3810-206-12).
are identical, and are removed or installed in a similar
(2) Remove two nuts (10, fig. 5-7) from front of
manner. Upper and lower track rollers support track
adjusting blocks (12), then remove idler sprocket (4),
around the crawler frame.
adjusting blocks (12), and shaft (11) from crawler frame.
(3) Pull two adjusting blocks (12) from shaft
(11).
5-10. Track Support Rollers
(4) Slide idler sprocket (4) from shaft (11).
a. Removal and Installation.
(5) Remove two bearings (1) from idler sprocket
(1) Remove upper track support rollers (TM 5-
(4), then remove fitting (2) from bushing (3), and bushing
3810-206-12).
(3) from idler sprocket.
(2) Remove nuts (49, fig. 5-6), lockwashers
(6) Remove four cotterpins (8) from nuts (7).
(50), bolts (44), and mudguard (43) from crawler frame.
(7) Remove nuts (10 and 7) from front of
(3) Remove nuts (38), lockwashers (36), bolts
adjusting rod (5), then remove flatwasher (9).
(48), bearing caps (45), lower rollers (46) and roller
(8) Remove nut (7) and flatwasher (9) from rear
shafts from side frame.
of adjusting rod (5).
(4) Install by reversing procedures in steps (1)
(9) Remove adjusting rod (5) and springs (6)
through (3) above.
from crawler frame.
b. Cleaning, Inspection, and Repair.
(10) Repeat steps (6) through (9) above for
(1) Clean all parts and dry thoroughly.
remaining adjusting rod.
(2) Inspect all track support rollers for excessive
(11) Install by reversing procedures in steps (1)
wear or an out-of-round condition. Inspect all bearings
through (10) above, then adjust tracks (TM 5-3810-206-
and shafts for scoring or excessive wear.
12).
(3) Repair by replacing all defective parts.
5-8
