Motor Brush Replacement
18
312361D
Motor Brush Replacement
See Wiring Diagram, page 27.
Removal
Replace brushes worn to less than 1/4 in. (6mm).
Brushes wear differently on each side of motor, check
both sides.
1.
Relieve Pressure, page 7. Disconnect power cord
from outlet.
2.
Hi-Boy Models Only - Disconnect high-pressure
hose at pump outlet (see page 13).
3.
Remove two screws (4) and shroud (12) (see
illustration on page 17).
4.
Disconnect motor connector (D) from control board
(18).
5.
Cut tie wrap (F).
6.
Locate two yellow wires (C) (thermal leads). Cut
each yellow wire at the center.
7.
Using a flat screwdriver, carefully pry off (two) brush
caps (A). Remove brushes (B) from motor.
8.
Discard old brush harness.
9.
While rotating fan by hand, using compressed air,
blow air into positive (top) brush holder to remove
brush dust.
Installation
\
1.
With wires facing toward front of motor, install new
brushes (B) in motor. Be sure to install the positive
(red) brush lead in the top of the motor (as shown)
and the negative (black) brush lead in the side of the
motor.
2.
Push each cap (A) into place over brush. Orient
each cap with the 2 projections on either side of the
brush lead. You will hear a “snap” when cap is
securely in place.
3.
Using a wire stripper, strip off wire insulation approx-
imately 1/4 inch (6 mm) from the end of each yellow
wire (C) to the motor.
4.
Insert stripped end into end of a butt splice (E) on
new brush assembly.
5.
Use a crimping tool to squeeze the ends of the butt
splice (E) tightly around each wire. Pull gently on
each wire to be sure it will not pull out of the butt
splice.
6.
Reconnect motor connector (D) to control board
(18).
7.
Replace shroud (12) and two screws (4) (see illus-
tration, page 17).
8.
Hi-Boy Model Only - Reconnect high-pressure hose
at pump outlet (see page 14).
To contain the dust, turn on your shop vac. Place
the end of a vacuum over the negative (lower)
brush holder while blowing compressed air into the
positive (top) brush holder.
Use all new parts included in your brush kit. Do not
reuse old parts if new replacement parts are
provided.
ti5637a1
30
29
33
A
B
+
-
C
D
E
ti5637b
D
A
Red
Black
