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Motor SEM
Page 69
MC-425-13
C0-425-48
REPAIR
The only recommended repair to a motor is cutting the commutator. If any other components are damaged then
they should be replaced.
Repairing the Commutator
1:
First measure the diameter of the commutator. If the commutator is close to minimum diameter specified in
Service Limits at the end of this section, then it should be replaced.
2: Using a lathe, cut the armature just enough to remove all grooves, depressions or ridges.
3:
Measure the diameter of the commutator. If the commutator is less than the minimum diameter specified in
Service Limits at the end of this section, then the it should be replaced.
4: Thoroughly clean all copper debris from between the commutator segments.
5: Measure the commutator undercut depth in 5-places around the commutator. If any one of the
measurements is less than the minimum undercut depth specified in Service Limits, then the commutator
must be undercut (see below).
6:
While still in the lathe, smooth the commutator with fine emery cloth and reinspect for debris between the
commutator segments.
Undercutting the commutator
1: Using a small straight cut saw blade, cut the commutator insulation to the proper depth. Refer to undercut
depth in Service Limits at the end of this section.
2: Once all segments have been properly undercut, mount the armature in a lathe and smooth the commutator
with fine emery cloth.
Inspect the armature for shorts. Refer to Motor Inspection section for information on testing the armature.
Note: Copper debris in the undercut area can give a reading of a shorted armature.
This section is one section of a complete service
manual. Before starting any procedure, read all
warnings and instructions that are located in the
Service Guidelines chapter.
WARNING
Properly cut commutator
Summary of Contents for C0-425-48
Page 6: ......
Page 12: ...Page 12 MC 425 13 Introduction C0 425 48 Notes...
Page 20: ...PM Schedule Page 20 C0 425 48 MC 425 13 Notes...
Page 21: ...Table of Contents Special Tool List Special Tool List Tool List 22 Troubleshooting Guide 24...
Page 28: ...Lubrication Page 28 C0 425 48 MC 425 13 Notes...
Page 44: ...Steering Page 44 C0 425 48 MC 425 13 Exploded View of Steering Gear...
Page 46: ...Steering Page 46 C0 425 48 MC 425 13 Notes...
Page 76: ...Tires Wheels Page 76 C0 425 48 MC 425 13 Notes...
Page 86: ...Wire Diagram Page 86 C0 425 48 C0 425 48 Notes...
Page 96: ...Replacement Parts Page 96 MC 425 13 C0 425 48 AXLE ASSEMBLY FRONT AXLE SHAFT ASSEMBLY REAR...
Page 98: ...Replacement Parts Page 98 MC 425 13 C0 425 48 TRANSAXLE ASSEMBLY REAR...
Page 100: ...Replacement Parts Page 100 MC 425 13 C0 425 48 BRAKES BRAKE LINES...
Page 104: ...Replacement Parts Page 104 MC 425 13 C0 425 48 BRAKE PEDAL ASSEMBLY...
Page 106: ...Replacement Parts Page 106 MC 425 13 C0 425 48 CONTROL SYSTEM MOTOR SPEED CONTROL...
Page 118: ...Replacement Parts Page 118 MC 425 13 C0 425 48 STEERING LINKAGE...
Page 120: ...Replacement Parts Page 120 MC 425 13 C0 425 48 SUSPENSION FRONT STEERING COLUMN...
Page 122: ...Replacement Parts Page 122 MC 425 13 C0 425 48 SUSPENSION REAR...
Page 126: ...Replacement Parts Page 126 MC 425 13 C0 425 48 Notes...
Page 127: ......