Landa HOT Series Operator's Manual page 20

Maintenance
Troubleshooting
PROBLEM
PUMP RUNNING
NORMALLY BUT
PRESSURE LOW ON
INSTALLATION
FLUCTUATING
PRESSURE
PUMP NOISY
PRESENCES OF WATER
IN OIL
WATER DRIPPING FROM
UNDER PUMP
OIL DRIPPINGS
MACHINE SMOKES
20
POSSIBLE CAUSE
Pump sucking air
Valves sticking
Unloader valve seat faulty
Nozzle incorrectly sized
Worn piston packing
Valves worn
Blockage in valve
Pump sucking air
Worn piston packing
Air in suction line
Broken or weak inlet or discharge valve
springs
Excessive matter in valves
Worn bearings
Oil seal worn
High humidity in air
Piston packing worn
O-Ring plunger retainer worn
Pump protector
Oil seal worn
Improper fuel or water in fuel
Improper air adjustment
Low fuel pressure
Weak fuel pump
Fuel filter partially cogged
Soot build up on coils
Lime build up in coils
Improper burner nozzle
Landa HOT Series Operator's Manual 8.917-208.0 - B
SOLUTION
Check water supply and possibility of air
seepage.
Check and clean or replace if necessary.
Check and replace if necessary.
Check and replace if necessary (See serial
plate for proper size).
Check and replace if necessary.
Check and replace if necessary.
Check and replace if necessary.
Check water supply and air see page at joints
in suction line.
Check and replace if necessary.
Check water supply and connections on
suction line.
Check and clean if necessary.
Check and clean if necessary.
Check and clean if necessary.
Check and replace if necessary.
Check and change oil twice as often.
Check and replace if necessary.
Check and replace if necessary.
Reduce inlet water pressure. Do not close
trigger on spray gun for longer than 1-2
minutes.
Check and replace if necessary.
Drain tank and replace contaminated fuel.
Readjust air bands on burner assembly.
Adjust fuel pump pressure to specifications.
Check fuel pump pressure. Replace pump if
needed.
Replace as needed.
Clean coils with soot remover.
Clean inside of coils using Landa's coil cleaner.
See combustion assembly breakdown