Troubleshooting
20
332882A
Troubleshooting
Problem
Cause
Solution
Unit doesn’t prime
Air leak due to loose suction
nut
Tighten suction nut.
Air leak due to worn o-rings
For Hi-Boy:
Replace o-ring (108526) on suc-
tion seat and o-ring (867370) below suction
seat.
For Stand:
Replace o-ring (120777) on suc-
tion seat and o-ring (121370) below suction
seat.
Air leak due to hole in suction
hose
Replace suction hose.
Stuck or fouled balls
Service inlet and outlet valves.
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 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
Worn spray tip
Replace spray tip.
Packings and/or pistons worn
Repack unit.
Upper seat worn
Replace upper seat.
Unit does not run
Blown fuse
Replace fuse:
120V models: 12.5A time delay fuse
220V - 240V models: 8A time delay fuse