Model 6210 Maintenance Manual

Section 7.Component Procedures

Electrical Components DC Motors, General

Terminal Nuts

Do not attempt to repair power cable terminal lugs without approved tools. If a power cable has worn or damaged lugs, either replace the cable or replace the lugs using the procedure described in “Power Cable Repair” on page7-45 . Do not substitute other kinds of nuts for the flanged nuts. Fail ure to use correct cables, flanged nuts, and torque values can result in overheating and damage to components.

Polishing the Commutator

NOTE: Wrap the stone with narrow (1/2 to 3/4 inch wide) masking tape in a spiral configuration. Leave only enough stone exposed to make contact with the commutator. As the length of the stone becomes shorter with use, peel back and remove portions of the tape.

Make sure loose clothing and hair are tied back. Do not wear jewelry. Wear insulated gloves to protect your hands during this procedure.

1.If the motor has four or more brushes, remove an accessible brush from the motor with the motor still installed in the truck. If the motor only has 2 brushes or the commutator is not accessible with the stone, the armature must be installed in a lathe or replaced. If so, go to step 4.

2.Activate the motor.

3.With the motor turning, carefully insert the commutator stone into the brush box area.

Whenever you disconnect and reconnect any power cables to the motors or traction amplifier, always tighten the cable securing nuts with a torque wrench to prevent over-tightening them and damaging the motor or traction amplifier.

Check these torques each time you check the motors and the traction amplifier. Use two wrenches to avoid twisting the terminal stud. See Figure7-74.

4.Using minimal pressure, run the stone back and forth across the commutator until it is polished. Do not pass the stone over the ends of the commutator segments.

5.Thoroughly blow out the motor with compressed air.

6.Inspect the commutator. Reinstall the armature or brush and any removed covers.

7.Check operation.

Publication: 1146947, Revised: 12 Jan 2017 7-61

Traction Motor

Model 6210

Maintenance Manual

Section 7.Component Procedures

Electrical Components Traction Motor

Table 7-4.Traction Motor Component Legend

Item No.DescriptionItem No.Description

1Cap Screw, Socket Head21Cover, Speed Sensor

2Cover, Motor22Cap Screw, Socket Head

3Ring, Retaining23Washer, Lock

4Spacer24Sensor, Speed

5Bearing, Ball25Washer

6Key, Fitted26Cable Tie

7Armature27Sealing Strip

8Seal, Shaft28‘U’ Identification Label

9Ring, Retaining29‘W’ Identification Label

10Bearing, Ball30‘V’ Identification Label

11Stator31Terminal Board

12Insulating Sleeve32Cap Screw, Socket Head

13Pin, Threaded33Washer, Lock

14Nut, Pinion 34Nut

15Grommet35Plug Holder

16Seal, Shaft36Screw

17Pinion, Speed Sensor37Washer

18Washer38Plug and Wedge Lock

19Screw, Hex Head39Plug and Wedge Lock

20Nut40Brake Hub Mounting Location

Publication: 1146947, Revised: 12 Jan 2017 7-63