Prochem Legend XL - Manual (Page 36)

MAINTENANCE
86037400 02/16/07
4-11
PROBLEM CAUSE SOLUTION
Water supply is turned off or the float
valve is stuck or improperly adjusted.
Turn the water supply on or up. Check for
kinks in the water supply hose. Examine the
float valve and adjust or replace.
Water pump inlet supply line is plugged
or drawing air.
Examine the water inlet filter inside the water
box. Remove accumulated debris and
replace if required. Check for suction leaks
and loose clamps or fittings. Tighten any
loose fittings or clamps. Replace any
ruptured hose(s).
Improper engine speed
Using a tachometer, check the engine speed.
Full throttle engine speed is 2850 RPM. Idle
engine speed is 1400 RPM. Refer to the
“engine speed” section for instructions on
how to re-adjust.
Pressure regulator o-rings are dry.
Lubricate o-rings, using o-ring lubricant Part
#86265430, PRV NO. 05-008035.
Pressure regulator has worn o-rings Check o-rings. If necessary, replace.
Pressure regulator is dirty, stuck open,
or improperly adjusted.
Clean or repair regulator. Adjust to working
pressure. Lubricate o-rings, using o-ring
lubricant Part #86265430, PRV NO.
05-008035.
Low pump volume. (Measure the
amount of water being returned to the
water box from the pressure regulator.
It should fill a gallon container about
every 17 seconds).
Examine the check valves, plunger cups, and
cylinder head on the water pump. Repair,
whenever required (refer to the water pump
service manual).
Defective water pressure gauge. Replace gauge
Orifice (spray nozzle) in the cleaning
tool is worn, defective, or wrong size.
Replace Nozzle or change nozzle size.
Debris clogging water lines or water
inlet disconnect.
Clean or replace as needed.
Belts loose or broken Re-tension or replace as needed.
Loss of water pump pressure.
With the cleaning tool open,
the water pressure gauge
reads below the normal
operating pressure.
Loss of pump prime Manually prime water pump.
Plugged orifice and/or screen in the
cleaning tool.
Unplug or replace orifice and/or screen
Internal block between the pressure
regulator manifold and the outlet Y-
strainer, or the Y-strainer screen is
clogged
Inspect all lines, remove accumulated debris
which is blocking proper flow. Replace any
defective hoses. Remove, inspect, and clean
the Y-strainer screen. De-scale unit and
install a water softener, if necessary.
Outlet check valve is plugged Examine the check valve, remove any debris
Defective quick-connect on one or more
of the high pressure hoses. Replace defective quick-connects(s) on high
pressure hoses(s).
Cleaning tool valve is malfunctioning. Repair or replace valve.
Loss of solution volume at
cleaning tool orifice.
Water gauge reads normal.
Hose inner lining is constricted. Remove restriction or replace hose.
Air leak in chemical supply line, priming
valve or metering valve.
Check for air leaks. Replace faulty parts.