Spin Test; Motor Brush Replacement - Graco 395 Repair Manual

Setup
Electric Shock Hazard; page 4.
To check armature, motor winding and brush electrical
continuity:
1.
Relieve pressure; page 4.
2. Remove drive housing; page 19.
3. Fig. 3. Remove pressure control cover (50). Dis-
connect connector (F).
4. Fig. 4. Remove motor shroud (23) 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 20.

Motor Brush Replacement

395/495 Motor Brush Removal
Replace brushes worn to less than 1/2 in. Brushes
wear differently on each side of motor, check both
sides. Brush Repair Kit 287016 is available. Spring
clip, 112766, may be purchased separately.
1. Read General Repair Information; page 4.
2.
Relieve pressure; page 4.
3. Fig. 4. Remove motor shroud (23) and two inspec-
tion covers (A).
(Continued on page 11)
10
309674

Spin Test

Armature, Brushes, and Motor Wiring Open
Circuit Test (Continuity)
1. Connect red and black motor leads 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 10.
3. If still uneven or no resistance, replace motor;
page 20.
50
Fig. 3
A
Fig. 4
F
ti2572a
23
ti2571a