Drive Motor
Page 62
E-451 & E-457
ME-45X-01
REPAIR
Brushes
Note: It is recommended that all four brushes be replaced
as a set.
Note: The motor must be removed from the vehicle for
this procedure. Refer to Transmission Service
section for information on removing the motor.
The motor must be disassembled to replace the brushes or
the bearings. Refer to Disassembly section for information on
taking the motor apart.
Commutator
Note: The motor must be removed from the vehicle for
this procedure. Refer to Transmission Service
section for information on removing the motor.
1: The armature must be removed from the motor for this
procedure. Refer to Disassembly section for information
on taking the motor apart.
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, then the motor must be
replaced.
4: Thoroughly clean all copper debris from between the
commutator segments.
Note: Copper debris in the undercut area can give a
reading of a shorted armature.
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.
6:
While still in the lathe, smooth the commutator with fine
emery cloth.
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.
2: Once all segments have been properly undercut, mount
the armature in a lathe and smooth the commutator
with fine emery cloth.
3: 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 and undercut commutator
Summary of Contents for E-451
Page 6: ......
Page 12: ...Page 12 ME 45X 01 Introduction E 451 E 457 Notes...
Page 21: ...Table of Contents Special Tool List Special Tool List Tool List 22 Troubleshooting Guide 24...
Page 27: ...Lubrication Page 27 ME 45X 01 E 451 E 457 LUBRICATION DIAGRAM...
Page 28: ...Lubrication Page 28 E 451 E 457 ME 45X 01 Notes...
Page 32: ...Front Axle Page 32 E 451 E 457 ME 45X 01 Notes...
Page 39: ...Drive Axle Page 39 ME 45X 01 E 451 E 457...
Page 64: ...Drive Motor Page 64 E 451 E 457 ME 45X 01 Notes...
Page 72: ...Wire Diagram Page 72 E 451 E 457 E 451 E 457...
Page 92: ...Replacement Parts Page 92 ME 45X 01 E 451 E 457 AXLE SHAFT ASSEMBLY REAR...
Page 94: ...Replacement Parts Page 94 ME 45X 01 E 451 E 457 TRANSAXLE ASSEMBLY REAR...
Page 96: ...Replacement Parts Page 96 ME 45X 01 E 451 E 457 TRANSAXLE ASSEMBLY CHAIN CASE...
Page 100: ...Replacement Parts Page 100 ME 45X 01 E 451 E 457 CONTROL SYSTEM MOTOR SPEED CONTROL...
Page 108: ...Replacement Parts Page 108 ME 45X 01 E 451 E 457 FRONT WHEELS E 457...
Page 114: ...Replacement Parts Page 114 ME 45X 01 E 451 E 457 Notes...
Page 115: ......