Instruction manual
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
inuenced 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, Part # 331-784 for 220 - 240 volts) 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
Durotech (Current)
331-778
Durotech (Circa 2007)
331-784
Leeson (Circa 2006 and Prior)
331-131