Water Pump Maintenance: 6-4
3.0. PSI gauge reads normal; low pressure from tool/wand
POSSIBLE CAUSE SOLUTION
3.1. There is a restriction in
the cleaning tool/wand.
Inspect tool jet and clean or replace as necessary.
Inspect any lters in the cleaning tool and clean or
replace as necessary.
3.2. There is a defective quick
connect in the system.
Inspect each quick connect and replace as necessary.
3.3. There is a restriction in
one of the solution hoses.
Remove quick connects and inspect hoses. Clean or
replace as necessary.
3.4. There are hard water
deposits restricting the
system between the heat
exchanger and the high-
pressure solution connection
at the front of the machine.
Descale the machine. If this doesn’t solve the problem,
disassemble this portion of the system and locate
restriction.
4.0. Pressure pulsation
POSSIBLE CAUSE SOLUTION
4.1. Water in the water-box
is too hot and is approaching
boiling point.
Check temperature of water in the water-box.
4.2. There is an air leak
between the water box outlet
and the pump inlet.
Physically check all hoses and ttings for cuts, breaks,
cracks or tightness. Repair as necessary.
4.3. One of the intake or outlet
valves in the high-pressure
pump is defective or is being
held open by debris.
Remove each valve and inspect for correct operation.
5.0. Water box empty or lls slowly
POSSIBLE CAUSE SOLUTION
5.1. There is a restriction in
the water supply system.
Inspect the supply system from the source through the
incoming quick connect for kinks, clogs or restricted
lters. Clean or repair as necessary.
5.2. The oat valve in the
water box is defective
Replace.
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