Motors Repair
DISASSEMBLE
See the Master Drive Unit section or the Frame sec-
tion for your lift truck for instructions on the removal
and installation of the traction motor.
See the Hydraulic System section for instructions to
remove and install the hydraulic pump and motor.
See the Brush and Commutator Inspection and Brush
Replacement in this section for more information on
these components of the motor.
Traction Motor and Hydraulic Pump Motor
NOTE: It is recommended that the bearings and the
seal be replaced every 3,000 hours or 36 months,
whichever comes first.
1. Clean outside surfaces of motor before disassem-
bly. See Figure 8, Figure 9, and Figure 10. Put
motor on its commutator (brush) end on a bench.
On hydraulic motor assemblies, make index
marks on pump and motor. Make index marks on
end frames of motor and field frame so correct as-
sembly is possible.
2. On hydraulic motor assemblies, remove two cap-
screws that fasten pump to pump motor. See Fig-
ure 11 or Figure 12. Remove pump. Put an index
mark on armature shaft at the position of the cou-
pler hub for correct assembly. Remove coupler
hub from armature shaft by loosening setscrew
and sliding hub off shaft and key. Do not lose key.
3. Remove brush cover. Remove brushes and
spring assemblies.
4. Remove hex head screws from commutator end
of motor. Carefully slide end frame from motor
and armature shaft. Do not damage parts. A
puller is frequently necessary to separate end
frame from field frame.
CAUTION
The drive end frame and the armature are heavy
components. Work carefully so the field coils,
pole pieces, and armature are not damaged dur-
ing disassembly and assembly.
5. Remove screws that fasten drive end frame to
field frame. Remove end frame and armature.
Use a plastic or rubber hammer as necessary to
loosen end frame.
0620 YRM 0294 Motors Repair
15
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