1. Make adjacent center punch marks on housings 10, 22 and field ring 20 so that
these marks can be lined up in assembly to locate the parts in their original
position.

2. Remove brush opening band 40.

3. Lift up levers 13 to relieve spring pressure, taking care not to snap them which will damage the brushes.

4. Now brushes 12 may be removed from brush holders 14. Do not pull "pigtails"
out of brushes.

5. Remove screws 1, bearing retainer 2, bearing retainer nut 5 and nut lockwasher 6. Do not remove fiat head screws 46.

6. Remove driven-end housing screws 33.

7. With a brass rod held against exposed commutator-end of armature shaft at 4, drive the shaft out of roller bearing 3.

8. The armature 38 with driven-end housing assembly 22 will now be free.

9. Place armature 38 in a bench vise and remove screws 31, bearing retainer 26, bearing retainer nut 29, nut lockwasher 28 and spacing collar 30. Do not remove fiat head screws 37.

10, Press armature 38 out of driven-end ball bearing 34.

11. Disconnect all internal connections from brush rigging 11.

12. Remove screws 39 and take away commutator-end housing 10.

13. Removal of two square head screws through two arc shaped slots in outer face of commutator-end housing 10 will release brush rigging 11.

14. Removal of fiat head screws 37 and 46 will release the inner bearing retainers at the driven-end and commutator-end.

15. Do not disassemble pole pieces 17 and field coils 19 from field ring 20 unless the field coils have to be replaced.

1. Clean all parts before reassembly.

2. Carefully inspect to determine if any repairs or replacements are necessary.

3. Test armature and field coils for ground with test lamp using alternating current. (110 volt, 60 cycle).

4. Field coils are connected in series and have a resistance of 21.5 ohms ~- 0.5 ohms. At 32 volts the current will be from 1.45 to 1.5 amperes. Replace armature or field coils if necessary.

5. Discard brushes 12 when worn down to 9/16 inch length for full diameter commutator or % inch length for minimum commutator diameter. New brushes are 13/16 inch long.

6. The brush spring pressure range is 3 to 31~ lbs. up to the 4th notch of the brush lever.

7. For reassembly, reverse the procedure outlined in disassembly but note following instructions.

8. Make certain that the pilot diameters, matching diameters and facings on housings and field rings are not nicked or burred to insure proper alignment.

9. Use new felt washers 45 and saturate them in No. 6 Keystone Condensed Oil medium or equal.