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Troubleshooting Chart
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Operating Instructions and Assembly Instructions
21
Symptom Possible Cause(s) Corrective Action
Motor hums and does not run 1. Unit under pressure 1. Turn Prime/Spray Control to prime position
2. Equipment has been dropped
which caused motor to become
misaligned
2. Take to authorized service center to have motor assembly
realigned. Or, call technical support
3. Supply voltage too low 3. Do not use an extension cord, it is better to add hose length.
Use portable generator with a 2400 VA minimum rating
Motor does not run or hum 4. Power Switch is in OFF position 4. Flip Power Switch to ON position
5. Bad power connection 5. Check power connections at power receptacle, along extension
cord and at equipment for looseness or damage
6. Circuit breaker or fuse is tripped 6. Correct cause of circuit overload. (Possible causes: Supply
voltage too low, extension cord too long for available supply
voltage, equipment was under pressure while trying to start
motor or motor has been damaged.)
7. Thermal overload protection
activated
7. Allow motor to cool for approximately 30 minutes, determine
cause and restart motor. (Possible causes: Supply voltage too
low, extension cord too long for available supply voltage,
equipment was under pressure while trying to start motor or
motor has been damaged.)
Motor runs, but pump does
not prime after being cleaned
after last use. (This problem
can usually be prevented by
following the recommended
cleaning and storage
procedure)
8. Check valves stuck 8. “Pop” Inlet Valve and Outlet Valves. See Preparation
Instructions
9. Suction Assembly loose and/or
sealing surfaces are dirty at Inlet
Valve
9. Remove Suction Assembly, clean sealing surfaces and
reassemble
10. Suction Head not immersed in
paint
10. Add more paint to bucket and/or adjust position of Suction
Assembly
11. Prime/Spray Control is in the
spray position and/or the
Pressure Control is in the Low
Pressure/Hydraulic Bleeding
position
11. Turn the Prime/Spray Control to the Prime position and Pressure
Control fully clockwise
12. Hydraulic system contains air 12. Turn Pressure Control to Low Pressure/Hydraulic Bleeding
position for 1 minute while motor is running
13. Hydraulic oil level low 13. Add oil so level is within 1/4” of housing edge. (See notes in
Maintenance Section on oil leaks.) Turn Pressure Control to Low
Pressure/Hydraulic Bleeding position for 1 minute
Motor runs, but pump does
not prime even though it was
working just fine a little while
ago. (Usually occurs after
moving or adding more paint
to the paint bucket.)
14 See Possible Causes 9,10,11,13 14. See Corrective Actions 9,10,11,13
15. Clogged suction filter 15. Remove suction filter and clean. Also, refer to Maintenance
section
16. Trash caught in valves 16. See “Force Feeding” figure on page 23
17. Paint sediments settled to
bottom of bucket
17. Strain and mix paint thoroughly
Pump primes, but does not
build pressure
18. Prime/Spray Control not in Spray
position
18. Turn Prime/Spray Control to Spray position
19. Pressure Control not set to high
enough pressure
19. Turn Pressure Control clockwise to desired pressure. Fully
clockwise is maximum pressure
20. Even though Prime/Spray
Control is in Spray position, fluid
still flows from By-Pass Tube.
Prime/Spray Control is worn or
damaged
20. Replace with service kit (See replacement parts list) or take
equipment to authorized service center
Continued on next page