Operation and maintenance manual

Section 160-0030
SM 2147 Rev 1 10-03
7
Rear Axle Group - Axle Group (Hub)
hub guide sleeve tool 15500016 onto axle stub (29)
(see Fig. 6).
6. Using suitable lifting equipment, lift hub assembly
(38) and slide into position on axle. Take care when
inserting hub splines into brake assembly (40) so as
not to damage plates.
7. Carefully feed hub (38) onto axle stub (29) as far as
it will go by sliding it gently forwards.
Note: Do not bump the hub (38) onto the stub (29) by
pulling back and forth along axle stub (29). This can
cause the face seals (37) to come out of position.
8. With hub (38) still supported, and a second person
holding the hub in position, carefully remove hub guide
sleeve tool from axle stub (29).
9. Screw ring gear alignment tool 15500015 onto axle
stub threads, and slide ring gear unit (10 - 13) into
position on axle stub (29).
10. Remove ring gear alignment tool and fit hub nut
(14). Tighten hub nut (14) slowly to 375 lbf ft (508 Nm).
Note: This serves to gently draw the hub fully home
into position.
11. Remove hub lifting equipment and rotate hub (38)
unit through several revolutions to seat bearings (10 &
27).
12. Re-check hub nut (14) torque. Check alignment of
slots in hub nut (14) with slots in axle stub (29).
13. If slots are aligned, fit hub lock ring (15) and spring
ring (16). If slots are not aligned, tighten hub nut (14)
gradually until the slots do align. DO NOT SLACKEN
HUB NUT (14) TO ALIGN SLOTS.
Installation of Driveshaft
1. Once hub assembly has been refitted, fit sun gear
(9) and sun gear washer (17) onto driveshaft (24).
2. Retain sun gear (9) and sun gear washer (17) with
circlip (8) and slide driveshaft (24) through hole in end
of axle stub (29) until driveshaft (24) splines engage
with splines in drivehead.
Note: Fitting of sun gear (9) to driveshaft (24) before
insertion into axle stub (29) provides a better grip for
insertion of splines.
Note: To aid in assembly, moisten bore and 'O' ring
with a weak spirit/water mixture.
Installation of Hub Assembly
1. Prior to fitting hub assembly (38) to axle, it is
important to align and centralise the brake friction
plates. This can be done by first inserting a small piece
of bar between the teeth of the plates to bring them into
line (see Fig. 4).
Note: Ensure the large 'oil flow' gaps in the friction
plates are grouped together.
2. Remove bar, and insert plate centralising tool
15500014 (see Fig. 5).
3. Lock brake plates into the "ON" position by winding
the slack adjusters fully home. Refer to Section 165-
0010, BRAKE PARTS.
4. Remove plate centralising tool from brake.
5. With brake plates locked in a centralised position, fit
Fig. 4 - Aligning Plates
SM - 2725
Insert a small piece of
bar between teeth of
plates.
Plate centralising
tool
SM - 2726
Fig. 5 - Plate Centralising Tool