Troubleshooting
18
3A7382B
Troubleshooting
1. Follow the
2. Check all possible problems, causes, and solutions
listed below before disassembling the pump.
NOTE:
For troubleshooting and repair questions,
contact your distributor.
Mechanical/Fluid Flow
Problem
Cause
Solution
The displacement pump
operates, but output is low on
the up stroke.
The piston ball check is not seating
properly.
Service the piston ball check.
Piston packings are worn or
damaged.
Replace the packings.
The displacement pump
operates, but output is low on
the down stroke and/or on both
strokes.
Piston packings are worn or
damaged.
Tighten the packing nut or replace the
packings.
The outlet check valve is not seating
properly.
Clean the check valve.
The intake valve ball check is not
seating properly.
Service the intake valve ball check.
The rubber elbow has an air leak.
Tighten the elbow clamps.
Material leaks and runs over the
side of the wet cup.
The wet cup is loose.
Tighten the wet cup enough to stop
leakage.
Throat packings are worn or
damaged.
Replace the packings.
Fluid delivery is low.
The applicator tip is dirty or clogged. Clean or replace the applicator tip.
Clamps on the hopper hose are
loose.
Tighten the clamps on the hopper hose.
Large pressure drop in the fluid hose. Reduce the hose length or increase the
fluid hose diameter.
The electric motor does not
operate.
The power switch is not ON.
Turn the power switch ON.
The circuit breaker has been tripped. Check the circuit breaker at the power
source. Reset the motor switch.
The sprayer does not operate.
The fluid hose is obstructed.
Clean the fluid hose.
Dried fluid on the displacement rod or
inlet ball.
Clean the displacement rod. Always stop
the pump at the bottom of the stroke.
Keep the wet cup filled with TSL. Be sure
the inlet ball moves freely.
