Motor Brush Replacement - Graco 190ES Repair Manual

Motor Brush Replacement

See Wiring Diagram, page 26.
Removal
Replace brushes worn to less than 1/4 in. (6 mm).
Brushes wear differently on each side of motor, check
both sides.
1. Relieve pressure, page 5. Disconnect power cord
from outlet.
2. Remove the following from 210
a. Remove kick stand (66)
b. Remove two screws (5) and toolbox (3).
3. Remove two screws (11) and front cover (32).
4. Remove screw (13) and shroud (12) (see illustration
on page 14).
5. Disconnect motor connector (D) from control board (18).
6. Cut tie wrap (F).
7. Locate two yellow wires (C). Cut each yellow wire at
the center.
8. Pry off two brush caps (A). Remove brushes (B)
from motor.
9. Discard old brush assembly.
10. Rotate fan by hand and blow compressed air into
top brush holder to remove brush dust.
Place end of a shop vacuum hose over lower brush
holder. Turn on shop vacuum when you blow com-
pressed air into top brush holder.
Installation
\
Use all new parts included in brush kit. Do not
reuse old parts if new replacement parts are pro-
vided.
1. Install new brushes (B) in motor with wires facing
toward front of motor. Install positive (red) brush
lead in top of motor and negative (black) brush lead
in side of motor.
16
Hi-boy models:
ES
.
2. Push each cap (A) into place over brush. Orient
each cap with the two projections on either side of
the brush lead. You will hear a snap when cap is
securely in place.
3. Strip approximately 1/4 inch (6 mm) of insulation
from end of each yellow wire (C) from motor.
4. Insert stripped end into end of a butt splice (E) on
new brush assembly.
5. Crimp ends of butt splice (E) around each wire. Pull
gently on each wire to be sure wire does not pull out
of butt splice.
6. Wrap new tie wrap around motor and wires only. Trim off
excess. Be sure pressure hose is not caught in tie wrap.
7. Connect motor connector (D) to control board (18).
30
29
A
33
+
A Red
D
B
8. Install shroud (12) with screw (13) (see illustration,
page 14).
9. Install front cover (32) with two screws (11).
10. Install the following on 210
a. Install toolbox (3) with two screws (5).
b. Install kick stand (66).
Motor Brush Replacement
D
E
C
Black
-
ti5637b
Hi-Boy models:
ES
312805A
ti9133a