Troubleshooting
3A7382B
19
Speed is erratic and/or
accelerated.
The material supply has been
exhausted, or clogged the suction.
Refill the hopper and prime the pump.
The piston valve or packings are
worn or open.
Clear the piston valve and replace the
packings.
The intake valve is worn or open.
Clear or service the intake valve.
The pump cycles or fails to hold
pressure at stall.
Check balls, seats, or piston
packings are worn.
Service the lower pump.
Poor finish or irregular spray
pattern.
The atomizing air pressure is
inadequate.
Adjust the air needle valve on the
applicator (see your applicator manual).
The spray applicator is dirty, worn, or
damaged.
Service the spray applicator (see your
applicator manual).
The motor is powered but
nothing comes out of the hose.
The pump is packed out with dry or
cured material.
Disassemble and clean the pump.
Reverse the hose and try to push out the
bad material.
Some materials may only require 1 in.
inner diameter fluid line all the way to the
outlet.
The outlet check valve has been
installed backwards.
Re-install the outlet check valve in the
proper orientation.
Material is too thick to push
through the hose without
packing out.
The hose is too restrictive.
Thin and mix material thoroughly to lower
the viscosity.
Use a pump system priming fluid (slime).
Wet out the system.
Use a larger diameter hose.
Problem
Cause
Solution
