TM 5-2420-230-24-1
Spicer Speciality Axle Division - Technical Publications
SECTION 6
DISMANTLING THE BRAKE SHOE UNIT
6.1
Inspect brake linings (40) for wear / damage.
Minimum allowable thickness of liner (40) is 5/16 " (8mm) measured at centre of brake shoe.
If new linings are required, drill out, using a 1/4 " dia. twist drill and discard brake shoe rivets (58).
6.2
6.3
Inspect brake shoe bushes (67) for wear / damage and using service tool E320 or other suitable
bumper, knock out for replacement if required.
6.4
Pull out brake shoe roller pin split pin (36).
6.5
Using a soft metal drift knock out brake shoe roller pin (41) thus releasing brake shoe roller (37).
Inspect both roller and pin for wear / damage and replace if required.
6.6
Remove brake shoe anchor pin split pin (70) and pull out brake shoe anchor pin (69) using a
1
/8 " dia wire hook.
6.7
Repeat operations 6.1 to 6.6 for other brake shoe assembly.
SECTION 7
DISMANTLING BRAKE BRACKET AND CAM SHAFT UNIT
NOTE :-
Hub assembly must be removed before starting this section.
7.1
Disconnect air chamber from slack adjuster (49).
7.2
Remove brake cam circlip (52) and pull off washer and spring (51 & 50).
7.3
Mark position of slack adjuster (49) relative to cam shaft (23) then tap slack adjuster from its position on
brake cam shaft splines (23) using a hide faced hammer.
7.4
Pull brake cam shaft (23) from brake bracket (29).
7.5
Remove cam head 'O' ring and washer (28 & 27) from cam shaft (23).
7.6
Remove and discard oil seal (32) from brake bracket (29).
7.7
Inspect brake cam bush (31) for signs of wear / corrosion and if replacement is required knock out of
brake bracket (29) using service tool no E316 or other suitable bumper tool.
7.8
Check cam bracket bush (43) for wear / corrosion and knock out for replacement, if required,
as follows :-
a)
Remove brake cam bracket nuts (47) with washer (48).
b)
Remove slack adjuster cam bracket (44) from its position on cam bracket studs (53).
c)
Remove and discard oil seal (42), then drift out cam bracket bush (43).
7.9
Check condition of brake bracket anchor pin (25) and washer (26) for damage / corrosion and unscrew
and remove for replacement if required.
7.10
Check lubricators (34 & 45) and lubricator extension (33) for damage or corrosion and remove for
replacement if required.
7.11
If for any reason brake bracket (29) needs to be removed, take off brake bracket nuts (54) and
bolts (62), then knock brake bracket (29) from axle stub (55).
Page No.D6
Manual No. 1785 Issue A
Spicer Speciality Axle Division
J-98
