12
13
ELECTRIC MOTOR MAINTENANCE
1. LUBRICATION
- This motor is supplied with pre-
lubricated ball bearings, lubricated for the life of the
bearing.
2. MOTOR BRUSHES
- need periodic inspection and
replacement as wear indicates. Brush wear is greatly
influenced by individual application. It is recommended
that brush wear be checked at early intervals of
operation in order to determine future required
inspection. Standard Durotech brushes have an initial
length of 1". When the brushes are worn to a length of
1/2" they should be replaced.
TO CHANGE THE BRUSHES:
1. Unplug the machine.
2. Remove the cover over the motor (if applicable.)
3. Open the two covers at the rear of the motor.
4. Disconnect the brush wire.
5. Pull out the wire.
6. Push the brush retainer clip in and withdraw.
7. Remove the worn brushes.
8. Install new brushes in the reverse order.
For long life, new brushes (Part # 331-778 for 110 volt) need to have a run in period. After changing brushes, set the
machine for spraying. With a bucket of Pump Conditioner and water, a 50' 1/4" airless hose, airless gun and tip on unit,
open the prime valve and switch on. The pump will now prime. With pump running in the prime mode, turn the pressure
control knob to high pressure. (The pump has to cycle fast with no pressure in the pump). Run the pump for 20 minutes
and the brushes will be run in.
MOTOR BRUSHES
FIG. 12
331-778
