Motor Test; Motor Brush - Graco 231580 Instructions And Parts List

TYPE OF PROBLEM
Spray Pattern Variations
Motor Is Hot and Runs
Intermittently
Building Circuit Breaker
Opens As Soon As
Sprayer Switch Is
Turned On.
Circuit breaker opens
after sprayer operates
for 5 to 10 minutes.
Building circuit breaker
opens as soon as sprayer
is plugged into outlet and
sprayer is NOT turned on.
Unit will not run on gener-
ator but does run on AC
power
Intermediate Problem Solving
WHAT TO CHECK
If check is OK, go to next check
1. Spray tip worn beyond sprayer pressure capa-
bility.
2. Check transducer (29) for wear or damage.
3. Check pressure control (64) for smooth opera-
tion.
4. Check Low output section, page 15.
1. Determine if sprayer was operated at high pres-
sure with small tips, which causes excessive
heat build up.
2. Be sure ambient temperature where sprayer is
located is no more than 90 F (32 C) and
sprayer is not located in direct sun.
3. Check motor.
1. Check all electrical wiring for damaged insula-
tion, and all terminals for loose fit or damage.
Also check wires between pressure control and
motor. See page 22.
2. Check for missing motor brush inspection plate
gasket (see page 17), bent terminal forks or
other metal to metal contact points which could
cause a short.
3. Check motor armature for shorts. Use an arma-
ture tester (growler) or perform motor test. See
page 17. Inspect windings for burns.
4. Check motor start board (47) by substituting
with a good board.
CAUTION: Do not perform this check until
motor armature is determined to be good. A
bad motor armature can burn out a good board.
1. Check 'Basic Problems – Electrical' on page
13.
1. Check ON/OFF switch (52). Be sure sprayer is
unplugged! Disconnect wires from switch.
Check switch with ohmmeter. The reading
should be infinity with ON/OFF switch OFF ,
and zero with switch ON.
CAUTION: A short in motor circuit can damage
switch and or motor start board (47).
2. Check electrical supply with volt meter. Meter
should read 105–125 VAC.
Check the generator's peak voltage. This sprayer will
not run if the peak voltage is above 190V.
WHAT TO DO
When check is not OK, refer to this column
1. Replace spray tip.
NOTE: A smaller size tip will provide
longer life.
2. Replace transducer. See page 27.
3. Replace pressure control. See page 26.
1. Decrease pressure setting or increase tip
size.
2. Move sprayer to shaded, cooler area if
possible.
3. Replace motor. See page 22.
1. Repair or replace any damaged wiring or
terminals. Securely reconnect all wires.
2. Correct faulty conditions.
3. Replace motor. See page 22.
4. Replace board. See page 23.
1. Replace ON/OFF switch. See page 23.
2. If voltage is too high, do not operate
sprayer until corrected.
Use AC power or a different generator