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Drive Motor
Page 61
ME-45X-01
E-451 & E-457
Bearings
Pressing the armature out of the bearings is likely to damage the bearings. Once removed the bearings should be
replaced.
Commutator
1: Measure the outside diameter of the commutator.
• If the commutator is less than the minimum diameter specified in section Service Limits, then the motor must
be replaced.
2: 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 at the
end of this section, then the commutator must be undercut. Refer to the Repair Commutator section for
information regarding undercutting the commutator.
3: Inspect the commutator for groves.
•
If the commutator is grooved then it must be machined on a lathe. Do not machine the commutator past the
minimum diameter specified in Service Limits section. Refer to the Repair Commutator section for information
regarding machining the commutator.
4: Inspect the commutator for burn marks.
•
Burn marks and/or raised commutator segments 90 or 180 degrees apart is evidence of a shorted armature. A
tool called a growler is required to reliably test for a shorted armature.
5: Inspect the commutator for raised segments.
•
Raised segments could be a result of a stalled motor or shorted armature. A tool called a growler is required
to reliably test for a shorted armature.
•
If the armature is not shorted then the raised segments can be removed by machining the commutator. Do not
machine the commutator past the minimum diameter specified in Service Limits section. Refer to the Repair
Commutator section for information regarding machining the 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: ......