Landa 2HOT Series Operator's Manual page 21

Maintenance
Troubleshooting
PROBLEM
DETERGENT NOT
DRAWING
PUMP RUNNING
NORMALLY BUT
PRESSURE LOW ON
INSTALLATION
FLUCTUATING
PRESSURE
PUMP NOISY
PRESENCES OF WATER
IN OIL
WATER DRIPPING FROM
UNDER PUMP
POSSIBLE CAUSE
Air leak
Valve in the injector head may be
blocked, dirty or damaged
Filter screen on detergent suction
hose plugged
Dried up detergent plugging metering
valve
High viscosity of detergent
Hole in detergent line(s)
Low detergent level
Variable pressure control handle set for
high pressure
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
Foreign matter in valves
Oil seal worn
High humidity in air
Piston packing worn
Piston packing worn
O-Ring plunger retainer worn
Pump protector
Cracked ceramics
Landa 2HOT Series Operator's Manual - 9.808-353.0
SOLUTION
Tighten all clamps. Check detergent lines for
holes.
Clean or replace valve in injector.
Clean or replace.
Disassemble and clean thoroughly.
Dilute detergent to specifications.
Repair hole.
Add detergent, if needed.
Turn variable pressure control handle to
allow water to flow out of brass soap nozzle.
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 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.
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.
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