AXLES/DRIVE SHAFTS/WHEELS AND TIRES 5540F/YB5515 SERVICE MANUAL
8-24 Published 10-21-2010, Control# 198-04
activates and retracts correctly and does not stick in the
applied position before installing planet gear carrier 27.
If the brake piston has not retracted, the brake seal or
piston assembly may have been assembled incorrectly.
Alternatively, there may be residual pressure holding the
piston. Unscrew the brake bleed nipple with the engine
running and check that the piston retracts when the
pressure is released. Investigate the cause if the piston
remains in the applied position. See Residual Brake
System Pressure in Section 7.
28. Press drive shaft thrust pad 26 (chamfered side down)
into the recess in planet carrier 27.
29. Install new planet gears 28 in place of any that were
removed. Secure with retaining ring 29.
NOTE: The large radius at the end of the bearing bore
installs on the pin first.
30. Install sun gear 30 onto the drive shaft and secure with
external retaining ring 31. Install new o-ring 32.
31. Install planet gear carrier 27 onto bearing carrier 8,
turning it slightly to engage the gear teeth and align the
two tapped holes A Figure 8-45 in the bearing carrier.
(The tapped holes are diametrically opposite each
other.) Ensure that the planet gear carrier butts fully
against the bearing carrier.
NOTE: Do not strike the center of the planet gear carrier 27
when installed, as this may dislodge drive shaft
thrust pad 26.
32. Install screws 33 and tighten to a torque of 41.3 lb-ft
(56 Nm).
33. Fill the axle hub with oil. See Section 3, Preventive
Maintenance.
Drive Head Repair (Drive Axles Only)
Disassembly Figure 8-49
NOTE: The axle need not be removed to disassemble the
drive head.
1. Drain the oil from the axle center casing. Remove the
rear drive shaft from the axle.
2. Remove both hub assemblies with drive shafts (see
page 8-7).
3. Mark the installation position of the drive head carrier 2
Figure 8-49.
4. Remove bolts 1 and remove drive head carrier 2 from
the axle casing.
5. Clean the drive head carrier and axle casing mating
surfaces.
6. Pull out tension pins 3 and 4 and remove castellated
nuts 5 and 6.
7. Remove bearing outer races 7 and 8.
8. Drive off the taper roller bearing cone 9 from the
crownwheel differential case half.
9. Remove differential assembly 10 from the carrier.
10. Remove retaining bolts 11 and separate case halves 12
and 13.
11. Remove the two differential side gears 14 and thrust
washers 15.
12. Remove the four planet gears 16 and thrust washers 17
from trunnion pins (B).
13. Pull off taper roller bearing cone 18 from differential case
halve 12.
14. Remove Verbus Ripp bolts 19 and separate the
crownwheel 20 from differential case halve 13.
15. Use a drive coupling spanner to prevent drive yoke 23
from rotating. Remove pinion nut 21 and washer 22.
Remove the drive yoke.
NOTE: On later axles, pinion nut 21 and washer 22 ar
e
combined. The separate nut
and washer should be
discarded and replaced with the new combined nut
and washer.
16. Press pinion 24 from drive head carrier 2.
17. Pull out pinion oil seal 25 and taper roller bearing cone
26. If necessary remove bearing outer race 27.
18. If necessary, drive out pinion bearing outer race 28 and
shim(s) 29 from inner side of the drive head carrier.
19. Remove the collapsible spacer 30 and taper roller
bearing cone 31 from pinion 24.
CAUTION
Do NOT reuse Verbus Ripp bolts. They must be replaced
through out the assembly.
Reference Only
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