TM 5-2420-230-24-1
Spicer Speciality Axle Division - Technical Publications
SECTION 3
DISMANTLING HUB ANNULUS AND BRAKE DRUM UNITS
3.1
Remove brake drum retaining sectscrew (70) then back off brakes.
3.2
Support brake drum (2) approximate weight 105 lb with a sling, or other suitable lifting equipment.
Insert 2 off 7/16" UNF x 1 1/2 " long extractor bolts in tapped holes provided in drum and tighten to draw
drum from hub (16). Clean inner face of drum with a clean damp cloth ( do not use paraffin).
3.3
Remove sun gear circlip (62) then pull sun gear (61) off outer drive shaft / U.J. unit (102).
3.4
Remove pinch bolt nut (57) and pinch bolt (59) then with service tool no. E399, take off hub bearing nut
(58).
Screw a 1/2 " UNF x 1 1/2 " long bolt into each of three tapped holes provided in annulus carrier (14) then
3.5
evenly tighten bolts to draw annulus assembly, complete with outer hub bearing cone (53A) from axle
stub (98).
3.6
Pull off outer bearing cone (53A) from annulus carrier arm.
3.7
If, for any reason, (stress cracks / damage to annulus gear / carrier) annulus gear (13) needs to be
separated from annulus carrier (14) straighten tabs on annulus lockwashers (55) .
Take out annulus carrier setscrews (54) and discard lockwashers.
3.8
Annulus gear (13) can then be knocked from its register on annulus carrier (14) using a hide faced
hammer.
3.9
Inspect annulus dowels (56) for wear / damage and pull out for replacement if required.
3.10
With hub (16) supported by a sling, or other suitable lifting equipment, knock hub from axle stub (98)
using a hide faced hammer.
3.11
Place hub assembly, outer face down on work surface and remove and discard hub oil seals (52).
3.12
Lift out inner hub bearing cone (18A).
3.13
Inspect inner and outer bearing cups (18 & 120) for wear / damage and knock out for replacement if
required.
Note :-
If either bearing cup or cone needs replacing, a new matched cup and cone must be
fitted.
3.14
Check wheel studs (17) for signs of misalignment, looseness or wear and knock out for replacement if
required.
Spicer Speciality Axle Division
Manual No. 1785 Issue A
Page No.B4
J-34