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Motor Brush Replacement
20 309674M
Motor Brush Replacement
Note: Motors used in the UltraMax II, Ultimate MX II and ST Max II 490/495/595 model sprayers are brushless. The
following brush information and instructions apply to Ultra, Nova and ST Max 395/495/595 model sprayers only.
The Utlra, Nova and ST Max 395/495/595 sprayer’s motors are supplied by two different motor manufacturers. Style
A motor has brush caps held on with screws. Style B has brush caps that snap onto the motor. Determine which style
motor you are servicing and refer to the appropriate illustration in the following instructions.
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 287735 is available.
1. Read General Repair Information, page 8.
2. Relieve pressure, page 7.
3. Remove motor shroud and two inspection covers
(A).
4. Push clip spring (B) to release hook (C) from brush
holder (D). Pull out spring clip (B).
5. Pull brush lead (E) off terminal (F). Remove brush
(G).
6. Inspect commutator for excessive pitting, burning, or
gouging. A black color on commutator is normal.
Have commutator resurfaced by a motor repair shop
if brushes wear too fast.
WLD
WLD
A
Style A
Style B
WLD
B
C
D
E
F
G
Style A
Included in Brush Repair Kit
Minimum 0.5 in. (12.5 mm)
WLD
Style B
B
C
G
E
F
D
Motor lead; do not disconnect
Minimum 0.5 in. (12.5 mm)
Included in Brush Repair Kit