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Troubleshooting
24 332919C
Fluid Pump Runs Constantly
1. Perform Pressure Relief Procedure (page 21),
turn prime valve forward to SPRAY position, and
turn power switch OFF.
2. Remove control box cover.
Troubleshooting Procedure:
With a pressure gauge plumbed into the paint
hose, start the engine. Turn pump switch ON.
Does sprayer exceed maximum pressure?
Pump problem. See the proper fluid pump
manual for the sprayer for further trouble-
shooting procedures.
Disconnect clutch wires from control board (see
diagram, page 29). Does the pump stop run-
ning?
Mechanical problem in the clutch pinion as-
sembly (clutch may be close to the rotor).
Make sure clutch wires are plugged in (see dia-
gram, page 29). Do the clutch test points read
10-18 DC volts?
Check for a short from the two clutch wires
to the frame. If shorted, repair or replace
faulty wire.
Unplug transducer from control board.
Bad transducer.
Replace and test with a new one.
Replace the control board.
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YES
YES
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