17
Maintenance
PROBLEM
POSSIBLE CAUSE
SOLUTION
OIL SQUIRTS OUT
OF OIL CAP ON PUMP
Pump overfilled with oil
Maintain oil level at red dot on sight glass at
rear of pump or at top of notch on
dipstick (where applicable).
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.
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.
SYSTEM WILL
NOT START
Power, water, auto switch not on
Check and turn on.
Motor overload tripped
Check and reset.
Control fuse blown (2 or 3 amp)
Check and replace.
Pressure switch faulty
Check, clean or replace.
Timer faulty
Check and replace.
SYSTEM WILL
NOT STOP
Water leak in discharge line
Repair water leak.
Pressure switch faulty
Disconnect at timer. If unit stops,
replace pressure switch.
Timer resistor faulty
Replace timer.
SYSTEM STOPS AFTER
APPROXIMATELY
10 SECONDS AND
THEN RESTARTS
Faulty pressure switch
Check and replace.
Leak in system
Fix leak.
WATER IS
NOT HOT
Tank water low
Check for leaks and fill.
Temperature or level controls faulty
Check and replace.
MOTOR ”HUMS” BUT
DOES NOT TURN
Electric motor single phasing
Check for blown fuse or loose power
line connections.
PUMP RUNNING
NORMALLY BUT LOW
WATER PRESURE
Air leak in inlet
Check water supply and possibility
of air entering water connections.
Faulty pressure unloader
Bypass pressure unloader by wiring spray
gun open. If good PSI, turn machine off and
replace regulator. DO NOT
RELEASE SPRAY GUN WHILE
BY PASSING UNLOADER.
Landa EHW Operator’s Manual 8.941-114.0 - M
