Operation and maintenance manual

Front Axle Group - Differential Drive Head
4
Section 140-0060
SM 2148 5-02
DISASSEMBLY
Numbers in parentheses refer to Fig. 1.
WARNING
To prevent personal injury and property
damage, be sure wheel blocks, blocking
materials and lifting equipment are properly
secured and of adequate capacity to do the job
safely.
WARNING
When necessary to drive out components
during disassembly, be sure to use a soft drift
to prevent property damage and personal
injury.
Helical Gear Housing Disassembly
1. Remove setscrews (1) and spring washers (2).
2. Lift off bearing retainer (3) and shims (4).
3. Lift helical gear housing (5) from helical pinion (8).
4. If bearing replacement is required, use suitable
puller to remove outer bearing cone (7A) and inner
bearing cone (9A) from helical pinion (8).
5. Inspect helical pinion (8) for wear or damage and
replace if necessary.
6. If replacing inner or outer bearing cones (9A & 7A),
drift out the mating cup from gear casing (17) or
helical gear housing (5).
Note: If either bearing cup or cone need replacing,
they must be replaced as a set.
7. Remove any gasket material from bottom gasket
face of helical gear housing (5).
Differential Unit Disassembly
1. Match mark straps (33) as shown in Fig. 3 to ensure
correct rebuild position then remove nuts (35) and
washers (34).
2. Lift off two straps (33), adjusting nuts (23) and split
pins (51).
3. Lift complete differential and crownwheel assembly
from gear casing (17). Place assembly on bench with
crownwheel (25) teeth uppermost.
SM - 1204
Fig. 3 - Match Marking Gear Casing Straps
SM - 1205
4. Check end flanges (21 & 53) and differential housing
body (20) for identification and matching marks (See
Fig. 4). If unmarked, centre punch the parts to ensure
correct mating on assembly.
5. Remove nuts (54) from studs (19) which fasten
upper end flange (53) to differential housing body (20).
6. Lift off end flange (53) and thrust washer (26).
Fig. 4 - Matching Marks on Diff Housing