GEH-5304A
24
Do not use liquid solvents of any kind. Solvents will not remove carbon dust
accumulations, but will spread and wash them into critical areas.
Figure 2
Brush Assembly
F.
Commutator
Keep the commutator clean. Ordinarily, the commutator will require only occasional wiping with a piece of
canvas or other nonlinting cloth. Do not use lubricant or solvent on the commutator. Check the commu-
tator for roughness while running by feeling the brushes with a fibre stick, avoiding contact with live electri-
cal or moving mechanical parts. Chattering brushes give advance warning of deterioration of the commuta-
tor surface. (Refer to the Commutator Check Chart (GEA-7053) for commutator surface marking and causes
of poor commutator condition.) Commutator runout over .003” T.I.R. (Total Indicator Reading) and bar-to-
bar readings over .003” indicate need for repair. (Refer to Table 12.)
The presence of silicone in DC motors, particularly with totally enclosed con-
structions, will cause rapid brush wear. Sources of silicone include oils, RTV
compounds, hand creams, mold release agents, grease and some insulating
varnishes. These silicone substances must be avoided to ensure proper motor
performance.
Table 12
Commutator Diameters (In Inches)
Frame
Start
Min.
Wear
CD2512AT
5.30
5.02
0.140
CD2513AT
CD2812AT
5.96
5.66
0.150
CD2813AT
Summary of Contents for GEH-5304A
Page 26: ...GEH 5304A 26 ues ...
Page 34: ...GEH 5304A 34 Figure 3 Application Information for CD2512AT CD2813AT Frames ...
Page 36: ...GEH 5304A 36 Figure 5 Dimensions Air Openings for CD2512AT CD2813AT Frames ...
Page 38: ...GEH 5304A 38 Figure 6 Accessory Mounting CD2512AT CD2813AT ...
Page 39: ...GEH 5304A 39 Figure 7 Accessory Mounting CD2512AT CD2813AT ...
Page 40: ...GEH 5304A 40 ...
Page 43: ...GEH 5304A 43 Detach and fax or mail to the address noted above ...