Instruction manual

Troubleshooting
20 3A1184A
Troubleshooting
General
Problem Cause Solution
Unit doesn’t prime Airleak due to loose suction nut Tighten suction nut.
Airleak due to worn o-rings Replace o-ring (110636) on suction seat and
o-ring (867390) below suction seat.
Stuck or fouled balls Service inlet and outlet valves.
Prime/Pressure Relief valve not
opening
Clean or replace Prime Valve (866428)
Unit primes but has poor or no
pressure
Pressure set too low Turn up pressure.
Filter(s) are clogged Clean or replace gun filter, inlet filter, and/or
manifold filter.
Outlet valve fouled/worn. Service outlet valve.
Prime/pressure relief valve
bypassing
Clean or replace prime valve (866428).
Packings and/or piston worn Tighten packing nut, repack unit.
Unit does not maintain good
spraying pressure
Blown spray tip Replace spray tip.
Packings and/or pistons worn Repack unit.
Upper seat worn Replace upper seat.
Unit does not run See Machine Does Not Start
Machine does not start Control Settings Make sure machine is plugged into the wall.
Verify the on-off switch is in the ON position
and the pressure control knob is turned all the
way to the right (clockwise for maximum pres-
sure).
Circuit Breaker Use multi-meter to test the breaker for continu-
ity or replace with a new breaker. If breaker
reads good, see Power Source.