Service manual

16
17
FIELD TROUBLESHOOTING
PROBLEM CAUSE SOLUTION
Unit doesn't prime. Airleak due to:
1. Loose Suction Nut 1. Tighten Suction Nut
2. Worn O-Rings 2. Replace O-Rings (106-018 & 106-
017) on inlet valve.
Stuck or Fouled Balls Service inlet and outlet valves.
See pg 19
Prime/Pressure Relief Clean or replace Prime Valve (100-180).
valve not opening.
Unit primes, but has no
or poor pressure.
Unit does not maintain
good spraying pressure.
Unit does not run.
Pressure set too low.
Filter(s) are clogged.
Outlet Valve fouled
or worn.
Prime/Pressure Relief
valve bypassing.
Packings and/or piston
worn.
Blown spray tip.
Packings and/or piston
worn.
Outlet seat & ball
worn.
Turn up pressure.
Clean or replace gun lter,
inlet lter and/or manifold lter.
Service OutletValve. See pg 19
Clean or replace Prime Valve (100-180).
1. Tighten Packing Nut. See pg 21
2. Repack unit. See pg 20-21
Replace Spray Tip.
Repack unit.
Replace Piston.
Replace Outlet seat and ball.
See electrical troubleshooting on page 29.