21
Maintenance
PROBLEM
POSSIBLE CAUSE
SOLUTION
OIL
DRIPPING
Oil seal worn
Check and replace if necessary.
EXCESSIVE
VIBRATION
IN DELIVERY
LINE
Irregular functioning of the valves
Check and replace if necessary.
DETERGENT
NOT
DRAWING
Air leak
Tighten all clamps. Check detergent lines for
holes.
Restrictor in float tank is missing
Replace restricter. Check for proper orifice in
restrictor.
Filter screen on detergent suction
hose plugged
Clean or replace.
Dried up detergent plugging metering
valve
Disassemble and clean thoroughly
High viscosity of detergent
Dilute detergent to specifications.
Hole in detergent line(s)
Repair hole.
Low detergent level
Add detergent, if needed.
PUMP RUNNING
NORMALLY BUT
PRESSURE LOW
ON INSTALLATION
Pump sucking air
Check water supply and possibility
of air seepage.
Valves sticking
Check and clean or replace if necessary.
Nozzle incorrectly sized
Check and replace if necessary
(See serial plate for proper size).
Unloader valve seat faulty
Check and replace if necessary.
Worn piston packing
Check and replace if necessary.
BURNER
MOTOR
WILL NOT RUN
Fuel pump seized
Replace fuel pump.
Burner fan loose or misaligned
Position correctly, tighten set screw.
Defective control switch
Replace switch.
Loose wire
Check and replace or tighten wiring.
Defective burner motor
Replace motor.
RELIEF VALVE
LEAKS WATER
Relief valve defective
Replace or repair.
Landa PGHW Operator’s Manual 8.916-485.0 - Y
