Landa 2HOT Series, Operator'S Manual

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Maintenance
Troubleshooting
PROBLEM POSSIBLE CAUSE SOLUTION
DETERGENT NOT
DRAWING
Air leak
Tighten all clamps. Check detergent lines for
holes.
Valve in the injector head may be
blocked, dirty or damaged
Clean or replace valve in injector.
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.
Variable pressure control handle set for
high pressure
Turn variable pressure control handle to
allow water to flow out of brass soap nozzle.
PUMP RUNNING
NORMALLY BUT
PRESSURE LOW ON
INSTALLATION
Pump sucking air
Check water supply and possibility of air
seepage.
Valves sticking Check and clean or replace if necessary.
Unloader valve seat faulty Check and replace if necessary.
Nozzle incorrectly sized
Check and replace if necessary (See serial
plate for proper size).
Worn piston packing Check and replace if necessary.
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
suction 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.
Foreign matter in valves Check and clean if necessary.
PRESENCES OF WATER
IN OIL
Oil seal worn Check and replace if necessary.
High humidity in air Check and change oil twice as often.
Piston packing worn
Check and replace if necessary.
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.
Cracked ceramics Check and replace if necessary.
Landa 2HOT Series Operator’s Manual - 9.808-353.0
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