G 2500 3/4 Ton Van V8-305 5.0L VIN M SFI (1997)
^
Minimum allowable brush length is 12 mm (0.472 inch). Replace excessively worn brushes in sets.
7. Drive end housing bushing (37) for scoring or other damage. Replace the damaged bushing.
8. Ball bearings (12, 14 and 32) as follows:
A. Hold the armature (13) or driveshaft (31) and slowly rotate the outer bearing race by hand.
B. Check that the bearing turns freely without binding or the feel of flat spots.
C. Replace damaged bearings. Refer to "Repair Procedures" .
9. Armature assembly (13) for the following:
^
Gear teeth that are broken, or that show evidence of step wear or root interference.
^
Rough commutator surface. Polish with 400 grit polishing cloth if necessary. Thoroughly clean metal dust from between the commutator bars.
If the commutator surface cannot be repaired in this manner, replace the armature assembly. Do not turn the commutator in a lathe.
^
Worn commutator. Replace the armature assembly if the commutator outer diameter is less than 36 mm (1.378 inch) or if the undercut depth
at any point is less than 0.2 mm (0.008 inch). Do not undercut the insulation.
10. Driveshaft (31) for the following; replace the drive shaft if damaged:
^
Scored or damaged shaft where it turns in the bushing (37).
^
Internal gear with teeth broken or showing evidence of step wear.
^
Damaged spline. The clutch drive assembly must slide smoothly and easily over the full length of the spline.
Armature Bearing Replacement
If necessary, replace the bearings (12 and 14) or armature (13).
Tool For Removing Center Support Bearing
Tool For Removing Center Support Bearing (Side View)
