Milwaukee 4555-22 TROUBLESHOOTING

page 22
PROBLEM CAUSE SOLUTION
Machine doesn’t reach high 1. Diameter of garden hose is too 1. Replace with 3/4 in. ga rden hos e.
pressure small.
2. Water supply is restricted. 2. Check garden hose for kinks, leaks,
and blockages.
3. Not enough inlet water. 3. Open water source full force.
4. Wrong nozzle is attached. 4. Attach the high pressure nozzle.
5. Engine throttle lever not in the 5. Open throttle completely.
maximum position.
6. Pressure adjustment handle not 6. Turn the han dle to the max imum
set in the maximum position. pressure.
Pump doesn’t produce pressure 1. Low pressure nozzle installed. 1. Replace with high pressure nozzle.
2. Inadequate water supply. 2. Provide adequate water flow.
3. Spray wand leaks. 3. Replace wand.
4. Nozzle is clogged. 4. Clean nozzle.
5. Pump is faulty. 5. Contact authorized service center.
6. Air in line. 6. Squeeze trigger on spray wand to
remove air from line.
Pump runs but produces no flow 1. Pump is not primed. 1. Flood suction then restart pump.
Pump looses prime, chattering 1. Air leak in suction hose or inlet. 1. Remove suction line and inspect it
noise, pressure fluctuates for a loose liner or debris lodged in
hose. Avoid all unnecessary bends.
Do not kink hose.
2. Clogged suction strainer. 2. Clean strainer.
Loud knocking noise in pump 1. Cavitation or sucking air. 1. Check tha t wat er su pply is tu rned
on.
2. Pulley loose on crankshaft. 2. Check key and tighten set screw.
3. Broken or worn bearing. 3. Contact authorized service center.
TROUBLESHOOTING