Maintenance, Service, and Repair
Motor Service
Page 5
REPAIRING THE COMMUTATOR
1. The motor must be removed from the vehicle for
this procedure. Refer to
Transmission Service
section for information on removing the motor.
2. The armature must be removed from the motor
for this procedure. Refer to
Motor Inspection-
Disassembly
section for information on taking
the motor apart.
3. Using a lathe, cut the armature just enough to
remove all grooves, depressions or ridges.
4. 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.
5. Thoroughly clean all copper debris from between
the commutator segments.
6. 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.
7. 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.
Example of freshly cut commutator
Properly undercut and cleaned
commutator segments
Insulation
Commutator
Incorrect
Hacksaw blade
Correct
Min. OD
Armature
Undercut
Summary of Contents for R 380-36
Page 12: ...TAYLOR DUNN...
Page 30: ...TAYLOR DUNN...
Page 50: ...TAYLOR DUNN...
Page 64: ...Maintenance Service and Repair Steering Page 14 Exploded View of Steering Gear...
Page 90: ...TAYLOR DUNN...
Page 128: ...TAYLOR DUNN...
Page 143: ...Sevcon Troubleshooting Page 3 Electrical Troubleshooting Identifying Your Controller...
Page 162: ...TAYLOR DUNN...
Page 185: ...Wire Diagrams...
Page 190: ...Illustrated Parts Parts Page 4 Steering Linkage...
Page 192: ...Illustrated Parts Parts Page 6 Steering Gear 4 1 6 8 7 5 9 10 2 3 14 17 12 11 13 15 16...
Page 194: ...Illustrated Parts Parts Page 8 Front Suspension...
Page 196: ...Illustrated Parts Parts Page 10 Transmission primary reduction...
Page 198: ...Illustrated Parts Parts Page 12 Transmission secondary reduction Rear Axle...
Page 200: ...Illustrated Parts Parts Page 14 Rear Brakes Front Brakes optional Brake Body...
Page 202: ...Illustrated Parts Parts Page 16 Rear Suspension...
Page 204: ...Illustrated Parts Parts Page 18 Motor...
Page 206: ...Illustrated Parts Parts Page 20 Deadman Seat Brake...
Page 214: ...Illustrated Parts Parts Page 28 Wheels and Tires Ref wheel hub 1 2 5 assembly 4 3 6 7 8 9 10...
Page 218: ...Illustrated Parts Parts Page 32 Speed Control Panel R 3 80 36 1 2 4 5 6 6 7 8 3 9 10 11 12 13...
Page 220: ...Illustrated Parts Parts Page 34 Miscellaneous Electrical Miscellaneous Frame...
Page 222: ...Illustrated Parts Parts Page 36 Seat Cushions and Lights 1 2 3 4 5 6 7 8 9...
Page 230: ...Illustrated Parts Parts Page 44 Batteries 36 Volt 48 Volt...
Page 232: ...Illustrated Parts Parts Page 46 Decals Front Cowl Tray Battery Compartment...
Page 234: ...Illustrated Parts Parts Page 48 Trailer Hitch...
Page 236: ...Illustrated Parts Parts Page 50 Strobe Light Other Front End Options...
Page 238: ...Illustrated Parts Parts Page 52 Cab Cowl With Windshield Options...
Page 240: ...Illustrated Parts Parts Page 54 Optional Cab Accessories...
Page 242: ...Illustrated Parts Parts Page 56 Cab Door Options...
Page 244: ...Illustrated Parts Parts Page 58 Optional Top Cover...
Page 246: ...Illustrated Parts Parts Page 60 Rear Seat Rear Gate and Rear Deck...
Page 248: ...Illustrated Parts Parts Page 62 9 Side Panels...
Page 250: ...Illustrated Parts Parts Page 64 Front Bumper and Splash Pan...
Page 252: ...TAYLOR DUNN...