Attachment Of The Electric Motor; Attachment Of The Electric Motor To The Transmission - ZF GK20 Maintenance And Installation Instructions

Attachment of the Electric Motor

If the unit is supplied with an already attached electric motor this chapter is not applicable.
The centering- and locating faces for connection of the electric motor must be perfectly clean and
undamaged. Check face run-out of the motor connecting face to the motor shaft. The maximum run-out
must not exceed 0.05 mm. (see Figure 04)
An excessive face runout will have a negative effect on the noise behaviour
and results in premature wear of the spur gear stage.
Assembly instructions for the splined shaft-hub connection
An assembly paste has to be used as assembling aid and later long-term lubricant for the splined shaft-
hub connection.
Approved special lubrication grease:

Attachment of the electric motor to the transmission

Apply a thin and even coat of the special lubrication grease BEM 34-132 onto the splined shaft-hub
connection. Assemble the electric motor (Item 1) into the centering seat of the pivot bogie bearing (Item 2)
and join it cautiously with the splined hub connection of the drive pinion (Item 3).
Turn the hole pattern of the pivoted bogie bearing to be accurately aligned with that of the electric motor.
Fasten the electric motor by means of six (6) cap screws M8 and locking pieces with the pivoted bogie
bearing. Pay attention to the minimum screw-in depth (see Fig. 04, Item 4).
Please observe the specified mounting dimensions of the corresponding
installation drawing!
For connecting cautiously rotate the wheel shaft of the transmission or the
input shaft of the electric motor (depending on the mounting position) until
the input shaft engages into the splined hub connection of the drive pinion.
When locating the electric motor take care that the splined shaft-hub
connection (Fig. 4; Item 5) of the drive pinion and the electric motor shaft
will not be damaged.
Damages cause louder running noises and premature failure of the splined
shaft-hub connection!
Maintenance and Installation Instructions
Klüberplex BEM 34- 132 (KLÜBER LUBRICATION)
Edition 11.07.2006 10 of 30