8.917-208.0 • HOT • Rev. 05/17
PRESSURE
W
ASHER
Tr
oub
leshooting Guide
18
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
FLUCTUATING
PRESSURE
Valves worn
Check and replace if necessary.
Blockage in valve
Check and replace if necessary.
Pump sucking air
Check water supply and air see page at
joints in suction line.
Worn piston packing
Check and replace if necessary.
PUMP NOISY
Air in suction line
Check water supply and connections on suc-
tion line.
Broken or weak inlet or discharge
valve springs
Check and clean if necessary.
Excessive matter in valves
Check and clean if necessary.
Worn bearings
Check and clean if necessary.
PRESENCES OF WA-
TER IN OIL
Oil seal worn
Check and replace if necessary.
High humidity in air
Check and change oil twice as often.
WATER DRIPPING
FROM
UNDER PUMP
Piston packing worn
Check and replace if necessary.
O-Ring plunger retainer worn
Check and replace if necessary.
Pump protector
Reduce inlet water pressure. Do not close
trigger on spray gun for longer than 1-2
minutes.
OIL DRIPPINGS
Oil seal worn
Check and replace if necessary.
MACHINE SMOKES
Improper fuel or water in fuel
Drain tank and replace contaminated fuel.
Improper air adjustment
Readjust air bands on burner assembly.
Low fuel pressure
Adjust fuel pump pressure to specifications.
Weak fuel pump
Check fuel pump pressure. Replace pump if
needed.
Fuel filter partially cogged
Replace as needed.
Soot build up on coils
Clean coils with soot remover.
Lime build up in coils
Clean inside of coils using Landa's coil
cleaner.
Improper burner nozzle
See combustion assembly breakdown
WATER TEMPERA-
TURE TOO HOT
Incoming water to machine warm
or hot
Lower incoming water temperature.
Fuel pump pressure too high
Lower fuel pressure.
Fuel pump defective
Replace fuel pump.
Detergent line sucking air
Tighten all clamps. Check detergent line for
holes.
Defective high limit switch
Replace.
Incorrect fuel nozzle size
See exploded view parts list for proper size.
Insufficient water supplied
Check G.P.M. to machine.
Restricted water flow
Check nozzle for obstruction, proper size.
Summary of Contents for Landa HOT 2-1100
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