Mechanical drive gear unit – 2550 Leakage from top cover T-code 677, 678, 679
Valid from serial number 723984-
Date 2005-10-28
Order number 222995-040
10.2 Leakage from top cover Dismantling • Lift up the truck, and block up to ensure that it is stable. • Unscrew the drive wheel. • Unscrew the M8 nuts (28), that hold the gear and motor, with a box wrench. Support the gear so that it does not drop. • Release the M8 bolts (12), that hold the cover (3), with a 6 mm hex socket wrench. • Change the gasket (6).
Assembling Assemble in reverse order. • Tighten the four M8 bolts and the four M8 nuts to a torque of 26.6 Nm Lock with Loctite 242. • Tighten the drive gear’s 5 bolts to a torque of 65 Nm.
10.3 Changing of the drive shaft’s sealing ring The drive shaft’s sealing ring can be changed with the gear mounted in the truck. Follow the instructions below if oil is leaking from the drive shaft.
Dismantling • Unscrew the drive wheel 1). • Remove the lower cover and drain off the oil (22). • Release the drive shaft nut. Remove the nut and washer (16,17). • Carefully tap out the drive shaft with a brass drift and hammer (32). • Pull off the bearing from the drive shaft with tool 08-13022 (29). • Check that the bearing washers are not damaged. If they have been damaged by the puller tool, measure the total thickness of the shim washers and change them before assembling (30). • Remove the sealing ring from the drive shaft (31).
10- 4
Service Manual
7PM18, 7PM20, 7PML20
© TIEE SARL
