AIRLESSCO LP 400, Service & Operation Manual

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15
ELECTRIC MOTOR MAINTENANCE
1. LUBRICATION - This motor is supplied with prelubricated ball bearings, lubricated for life of bearing.
2. MOTOR BRUSHES - These 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 inspections. The standard brushes for this motor have an initial length of 13/16".
When the brushes are worn to a length of 1/4", they should be replaced.
3. TO CHANGE THE BRUSHES, follow the procedures below:
a.
Unplug the machine.
b. Open the two covers at the rear of the motor.
c. Loosen the screw holding the brush terminal and remove the brush lead.
d. Push the brush retainer clip in and remove.
e.
Remove the worn brushes (one on each side of motor).
f.
Install new brushes in reverse order and replace covers.
NOTE: For longer life, new brushes (Part No. 331-778) need to have a run in period. After changing
brushes, set up the machine for spraying. Use a bucket of water and Airlessco Pump Conditioner mixture,
a 50 foot x 1/4" airless hose, airless gun with 0.017 tip on unit, turn the Prime/PR Control Valve to the
Prime position and turn the unit on. Turn the Pressure Control Knob to maximum pressure (fully CW
position) and let the pump cycle at high speed in the prime position for 20 minutes. This will allow the
brushes to "run in" properly giving a longer life.
Fan Width Orifice Size
Inches (mm) .012 .014
4-6 102-152 212 214
6-8 152-203 312 314
8-10 203-254 412 414