Landa MHP4 30324E Operator's Manual page 23

PROBLEM
PUMP
Air in suction line
NOISY
Broken or weak inlet or discharge valve
springs
Excessive matter in valves.
Worn bearings
Oil seal worn
PRESENCE
OF WATER
High humidity in air
IN OIL
Piston packing worn
WATER
O-Ring plunger retainer worn.
DRIPPING
Cracked piston
FROM UNDER
PUMP Pump protector
OIL
Oil seal worn
DRIPPING
EXCESSIVE
VIBRATION IN Irregular functioning of valves
DELIVERY LINE
Fuel pump seized
BURNER
Burner fan loose or misaligned
Defective control switch
MOTOR WILL NOT
Loose wire
RUN
Defective burner motor
RELIEF VALVE
Relief valve defective
LEAKS WATER
POSSIBLE CAUSE
Landa MHP Operator's Manual 8.913-925.0 - T
SOLUTION
Check water supply and connections on
suction line.
Check and replace if necessary.
Check and clean if necessary.
Check and replace if necessary.
Check and replace if necessary.
Check and change oil twice as often.
Check and replace if necessary.
Check and replace if necessary.
Check and replace if necessary.
Lower water supply pressure. Do not run
with spray gun closed longer than 5 minutes.
Check and replace if necessary.
Check and replace if necessary.
Replace fuel pump.
Position correctly, tighten set screw.
Replace switch.
Check and replace or tighten wiring.
Replace motor
Replace or repair.
Maintenance
23