TM 9-2320-279-34-2
Steering System Maintenance Instructions (Cont)
12-4. 90° GEARBOX REMOVAL/REPAIR/INSTALLATION (CONT).
a.
Removal.
(1)
Remove screw (1), nut (2), and lockwasher (3).
(2)
Remove steering shaft (4) from gearbox (5).
(3)
(4)
Support gearbox (5) and remove four screws (6) and lockwashers (7).
Remove gearbox (5).
b. Disassembly,
NOTE
Some gearboxes will have a third pipe plug in
place of the reducer bushing and vent. Remove
plug and install reducer bushing and vent
during reassembly.
(1)
Remove two pipe plugs (1) from
housing (2).
(2)
Remove vent (3) and reducer
bushing (4) from housing (2).
NOTE
There are two models of gearboxes. Model A
uses paper gaskets for sealing and bearing and
gear backlash adjustment. Model B uses
plastic shims and preformed packing for same
purposes. Model A paper gaskets are no longer
available and are replaced with Model B
components. Do step (3) for Model A. Do
steps (3.1) and (3.2) for Model B.
(3)
Remove four screws (5), pinion housing (6), paper gasket (7), and pinion shaft (8) from
housing (2).
(3.1) Remove four screws (5), pinion housing (6), plastic shims (7.1) and pinion shaft (8) from
housing (2).
(3. 2) Remove preformed packing (7.2) from pinion housing (6).
12-12
Change 2
