20
Maintenance
PROBLEM
POSSIBLE CAUSE
SOLUTION
PUMP NOISY
Air in suction line
Check water supply and connections on suction
line.
Broken or weak inlet or discharge
valve springs
Check and replace if necessary.
Excessive matter in valves
Check and clean if necessary.
Worn bearings
Check and replace if necessary.
PRESENCE OF
WATER 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.
Cracked piston
Check and replace if necessary.
Pump protector
Lower water supply pressure. Do not run with spray
gun closed longer than 5 minutes.
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 restrictor. 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.
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/
RUPTURE DISK
LEAKS WATER
Excessive pressure, thermal
expansion
Replace or repair
Landa SLT/SLX Gas Operator’s Manual 8.914-002.0 - AR
