13
309902
Spin Test
Setup
Read warnings, page 2.
To check armature, motor winding and brush electrical
continuity:
Relieve pressure, page 5.
1. Remove drive housing, page 23.
2. Fig. 2. Remove four screws (23) and pressure
control cover (56). Disconnect motor leads (F) and
(G).
3. Fig. 3. Remove motor shield (1) and inspection
covers (A).
Armature Short Circuit Test
Quickly turn motor fan by hand. If no electrical shorts,
motor coasts two or three revolutions before complete
stop. If motor does not spin freely, armature is shorted.
Replace motor, page 24.
Armature, Brushes and Motor Wiring Open
Circuit Test (Continuity)
1. Connect red and black motor leads together with
test lead. Turn motor fan by hand at about two
revolutions per second.
2. If uneven or no resistance, check for: broken brush
springs, brush leads, motor leads; loose brush
terminal screws, motor lead terminals; worn
brushes. Repair as needed; page 14.
3. If still uneven or no resistance, replace motor,
page 24.
Fig. 2
F
G
56
9578C
23
