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Troubleshooting
3A1696C 21
Paint guns not turning off immediately
or at all
Valve needed 1. Spray needle with light coat of lubricant.
Use air hose or water hose to break up
and remove solidified beads.
2. Replace needle, seat, and packings (see
Repair Kit 238339).
Gun arm wobbling or hopping exces-
sively
Swivel nut Gun arm wobbles
1. Remove dust cap (547).
2. Tighten boom arm swivel nut (504) until
swivel has slight restriction.
Gun arm hops
1. Lower air pressure in gun arm wheel.
2. Replace damaged gas shock (507).
Excessive overspray on gun arm
wheel
Paint guns out of position 1. Angle paint guns back 15° to 20°.
2. Coat wheel and gun arm parts with
non-stick cooking oil, light oil, silicon, or
Auto Mask ZEP to prevent paint from
sticking to them.
Pulsation in spray pattern Low or erratic pressure in paint pump 1. Check paint supply and suction inlet
screens.
2. Replace spray tips.
3. Check outlet filter.
4. Replace packings. Clean and service
intake valve and piston valve.
PROBLEM CAUSE SOLUTION