DRIVE UNIT
Drive Unit
114
M3.0-1055-008
07 Rev. 10/09
5. Clean the mount plate and mating bearing sur-
faces with parts cleaner. Assure both surfaces to
be free of dirt and oil.
6. Apply primer N (spray or brush) to the bearing
holder surface and allow the solvent to evaporate
completely - approximately one or two minutes.
Spraying only one surface with Primer N will delay
activating the gasket eliminator until the two joint
surfaces are assembled, thus allowing for addi-
tional assembly time and flexibility. Refer to the
Drive Unit parts page for primer and gasket elimi-
nator part numbers.
7. Refer to Figure 16178-01. Apply gasket eliminator,
061004-030 (50 ml) to the mount plate surface in
a continuous bead (10), distributed around all bolt
holes. Once applied, the bead or pattern should
not be disturbed until assembly to assure proper
seal.
Immediate assembly not required as long as sealant
has not been activated by the primer; however avoid
assembly delays longer than 45 minutes.
8. Guide sun pinion into the planet idler so gears
mesh as gearbox subassembly is moved into
place. Assemble mating gearbox assembly
squarely (without lateral movement) to assure an
even spread of the sealant across the interface.
9. Assemble with the nine socket head cap screws
(31). Refer to Figure 15454-02.
– Apply primer T (spray or brush) to both fastener
and hole threads, and allow solvent to evapo-
rate completely - approximately one or two
minutes. Apply thread locking adhesive onto
fastener threads as well as down the sides of
the female threads. Refer to Drive Unit parts
page for primer and thread locking adhesive
part numbers.
– Install the fasteners and torque in specified
cross-torque pattern as shown in Figure
16178-01. Torque screws to 75 ± 4 Nm (55 ±
3ftlb).
10. Allow sufficient cure time with parts undisturbed -
approximately 4 hours.
11. Fill drive unit with synthetic 75W/90 gear oil,
363514-001. Refer to Drive Unit Lubrication in this
chapter.
12. Install the drive tire. Refer to Drive Tire Replace-
ment in this chapter.
13. Connect all electrical connections to drive motor.
14. Raise the truck and remove the blocking material
from under the truck and lower to the floor.
15. Connect the battery.
16. Verify truck is operational.
Figure 16178-01
10 Gasket Eliminator
11 Gear Assembly Slot
Crown 2007 PF15706-8 Rev. 10/09
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