TM 5-2420-230-24-1
Spicer Speciality Axle Division - Technical Publications
SECTION 4
REMOVAL OF COMPLETE BRAKE ASSEMBLY Cont.
4.8
Using a hide faced mallet, knock complete assembly from its register. Suitable lifting gear may be
required to remove assembly and place on bench. See fig. no.3.
TP34
Fig.No.3.
SECTION 5
BRAKE SHOE REMOVAL ( After removal of complete brake assembly)
5.1
Cut, remove and discard lockwire securing two of four brake shoe pivot bush setscrews (42).
5.2
Remove brake shoe pivot bush setscrews (42) and washers (43) from one end of brake shoe pivot pins
(46).
5.3
Repeat operations 5.1 and 5.2 for other brake shoe pivot bush setscrews and washers on other end of
brake shoe pivot pins (46).
5.4
Cut, remove and discard lockwire securing brake shoe pivot pin lockscrews (45) then remove
lockscrews .
5.5
Drive out in turn brake shoe pivot pins (46). Care must be taken during this operation so as not to
damage pivot pin setscrew hole thread in the end of pivot pin.
5.6
Removal of brake shoe pivot pins (46) reduces brake shoe return spring (20) pressure on brake shoe
assemblies, enabling brake shoe return springs (20) to be unhooked from their anchor
pins (21 & 50).
5.7
The brake shoe assemblies can now be lifted from brake bracket (44).
SECTION 6
BRAKE SHOE REMOVAL (WITH COMPLETE HUB UNIT IN POSITION)
6.1
Remove brake drum retaining setscrew (70) then, after backing off brakes, remove brake drum (2). Use
lifting equipment if required - approx. weight of drum = 105lbs using 2 off 7/16" UNF x 1 1/2" long extractor
bolts.
6.2
Remove lockwire securing brake pivot pin setscrews (42), also lockscrews (45).
6.3
Remove pivot pins with washers (46 & 43) followed by lockscrews (45).
6.4
Turn hub until pivot pin extractor hole in hub flange (16) is in line with one of the pivot pins (46) then
remove pin outwards through extraction hole. See fig. no. 4.
6.5
Unhook brake shoe spring (20) then lift off brake shoe assembly (48).
6.6
Repeat operations 6.4 and 6.5 for other pivot pin / brake shoe assembly.
TP699
Setscrew (42)
Extraction hole
in hub flange (16)
Washer (43)
Setscrew (42)
Pivot pin (46)
Washer (43)
Lockscrew (45)
Fig.No.4.
Spicer Speciality Axle Division
Manual No. 1785 Issue A
Page No.B6
J-36
