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308613
Troubleshooting
NOTE: Check all possible solutions before disassembling the pump.
Problem
Cause Solution
Uneven spray pattern Fluid pressure too low Increase pressure to pump, or ad-
just fluid pressure regulator
Spray gun will not stop spraying Fluid pressure too high Reduce pressure to pump, or ad-
just fluid pressure regulator
Fluid needle binding Clean, repair
Piston packing binding Repair
Obstructed or worn needle seat Clean or replace
Spray gun will not spray Pump not operating Refer to separate pump manual
Fluid line clogged Clear
Fluid valve closed Open
Clogged orifice or needle seat Clean
No trigger or actuator air pressure Check, clean air lines
Worn or dry piston packings Replace
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