Spicer Speciality Axle Division - Technical Publications
SECTION 7 DISMANTLING THE BRAKE SHOE UNIT
Inspect brake linings (37) for wear / damage.
Minimum allowable thickness of liner (37) is 3/8 " (9.5mm) 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 (39).
Inspect brake shoe bushes (49) for wear/ damage and using service tool no. E320 or other suitable
bumper, knock out for replacement if required.
Pull out brake shoe roller pin split pin (32) then knock out brake shoe roller pin (36) thus releasing
brake shoe roller (33).
Inspect both roller and pin for wear / damage and replace if required.
Remove brake shoe anchor pin split pin (51) and pull out brake shoe anchor pin (50) using a 1/8 " dia
Repeat operations 8.1 to 8.6 for other brake shoe assembly.
DISMANTLING BRAKE BRACKET AND CAM SHAFT UNIT
The hub assembly must be removed before starting this section
Disconnect air chamber from slack adjuster (91).
Remove brake cam circlip (93), washer (92) and spring (94).
Mark position of slack adjuster (91) relative to cam shaft (19) then tap slack adjuster from its position on
brake cam shaft splines (19).
Pull brake cam shaft (19) from brake bracket (44).
Remove cam head washer (24) from cam shaft (19).
Remove and discard cam head 'O' ring (25) and oil seal (28) from brake bracket (44).
Inspect brake cam bush (27) for signs of wear / corrosion and if replacement is required knock out of
brake bracket (44) using service tool no. E316 or other suitable bumper tool.
Check chamber bracket bush (90) for wear / corrosion and knock out for replacement, if required, as
Remove chamber bracket nuts (95).
Tap brake chamber bracket (88) from its position on chamber bracket studs (83)
Remove and discard 'O' ring (89) then drift out cam bracket bush (90).
Check condition of brake bracket anchor pin (21) and washers (22) for damage / corrosion and remove
for replacement if required.
Check lubricators (30 & 87) and lubricator extension (29) for damage or corrosion and remove for
replacement if required.
If for any reason brake bracket (44) needs to be removed, take off brake bracket nuts (23 & 47) and
then knock brake bracket (44) from swivel jaw (71).
Spicer Speciality Axle Division
Manual No. 1785 Issue A