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NOTE: Replace the brushes when they have worn to
about 0.4 in (10 mm). Always check both brushes and
replace them together. A Brush Repair Kit, p/n
220–853, and the spring clip, p/n 110–816, are avail-
able. Order separately.
NOTE: Replacement brushes may last only half as
long as the original ones. To maximize brush life, break
in new brushes by operating the sprayer for at least
one hour with no load (remove the pump connecting
rod pin).
WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to relieve
pressure, follow the Pressure Relief
Procedure on page 10.
1. Remove the motor cover (14) and both inspection
covers (A). See Fig 8.
2. Push in the spring clip (D) to unhook it, and then
pull it out. See Fig 9.
3. Loosen the terminal screw (F). Pull the brush lead
(G) away, leaving the motor lead in place. Remove
the brush (C) and spring (B). See Fig 10.
4. Inspect the commutator for excessive pitting, burn-
ing or gouging. A black color on the commutator is
normal. Have the commutator resurfaced by a
qualified motor repair shop if the brushes seem to
wear too fast.
5. Install the new brush (C) so its lead is in the long
slot (K) of the holder (H). Slide the terminal (E)
under the terminal screw (F) washer. Make sure
the motor lead terminal (G) is still connected at the
screw. Tighten the screw. See Fig 11.
6. Place the spring (B) on the brush (C) as shown in
Fig 11.
7. Push in and hook the spring clip (D). See Fig 11.
8. Repeat for the other side.
CAUTION
Do not run the sprayer dry for more than 30 sec-
onds while checking the brushes to avoid damag-
ing the displacement pump.
Motor Brush
9. Reinstall the remaining parts.
Fig. 8
Part No.
110–816
Fig. 9
Fig. 10
Note: Spring must coil
in this direction
Minimum brush length:
0.4 in. (10 mm)
Fig. 11
14
B
B
C
G
A
C
D
D
E
F
H
J
K
C
B
D
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