Problem
Cause
Solution
Engine not running
No gas in the tank
See Engine Manual
gas valve closed
Cold start without choke
Set choke and start
No oil in engine
Refill
Loose spark plug
Tighten or replace
Unit does not prime
Air in the system
Turn control valve counter-
clockwise to “Prime” and wait
untill system is free of air
Paint too heavy
Thin paint
Filter is dirty or plugged
Clean or replace filter
Valve ball and seat stuck
Inspect and replace suction valve;
or fouled by corrosion, dried
Inspect and replace control valve;
paint or foreign material
Inspect and replace discharge valve
Engine throttle too low to
Increase engine throttle
engage clutch
Unit primes, but
Control (prime) valve open
Turn control valve clockwise
pressure doesn’t build
Air in system
Turn control valve counter -clockwise
to “Prime” and wait until system is free
of air
Excessive wear or dirt in
Clean or see instructions for
Control Valve Seat & Ball
inspection & repair of control valve
Misadjusted control valve
See instructions for Pressure Calibration
Unit primes, pressure
Too large tip size
Exchange tips for smaller size; Tips wear
builds up, but drops imme-
out after some time, enlarging the orifice
diately when gun is opened
(Important: check with
Inlet filter plugged
Clean or replace filter
pressure guage)
Paint too heavy
Thin or filter paint
Suction hose clamps not tight,
Tighten clamps
pump sucking air
Suction hose defective
Replace suction hose
Control seat and ball worn
See instructions for inspection &
replacement of Control Valve
Paint leaks through bleeding
Replace diaphragm assembly
hole in casting
If none of the above improved
Take unit to an Authorized Airlessco
spraying:
Service Center
Unit primes, pressure
Control or discharge valve worn
Conduct Low Spray Pressure Test
builds up, but does not
or obstructed
maintain pressure while
spraying
Oil leaking out of weep hole
Small amount of oil leaking is normal
None
Oil blowing out of weep
Diaphram installed with hole facing
Inspect and replace diaphram
hole
weep hole instead of towards engine
Paint leaks from weep hole
Diaphram failed
Conduct Low Spray Pressure Test
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TROUBLE SHOOTING
19
