Troubleshooting Guide
Problem
Possible Cause / Solution
Startup
Maintenance
A) Air pump will not run or pump solution.
B) Unit will not draw chemical or water.
C) Using too much chemical
D) Asphalt sticking in truck bed.
E) Pump runs too fast with no output.
1,5
2,5
3
4
6,11,12
7, 8, 9,10,11
7,8,9,10,11
Possible Cause / Solution
Startup
Maintenance
1. Air adjustment too low
Open air ball valve fully. Adjust air regulator slowly
clockwise. Optimum air pressure is at least 60 PSI 90
PSI maximum.
2. Water or chemical tube not immersed in container or
container empty
Immerse tube or replenish.
3. Dilution too strong
Turn chemical knob slightly clockwise or water knob
counterclockwise.
4. Dilution too weak
Turn chemical knob slightly counterclockwise or water
knob clockwise.
5. Discharge hose kinked
Straighten the hose.
6. Air regulator clogged or failed
Clean or replace.
7. Water or chemical check valve stuck or clogged
Clean or replace.
8. Chemical or water strainer clogged up
Clean or replace.
9. Vacuum leak in metering manifold or suction side of the
pump
Check and tighten the hose clamps connection(s). After
unit has been in service the plastic fittings could have
"relaxed" and may need tightened too.
NOTE: This is the most common problem when the
unit will not draw water or chemical!
10. Chemical or water tube stretched out where tube slides
over check valves or pin hole/cut in tube sucking air.
Cut off end of tube or replace tube, add a hose clamp,
do not over tighten.
11. Problem with air pump
Refer to air pump instruction manual.
Pump suction and discharge manifolds are loose,
tighten bolts.
12. Use of an oiler in the airline will cause pump to stall
Use only clean, dry air.
PREVENTIVE MAINTENANCE: When the unit will be out of service for extended periods, place chemical tube(s) in water and flush the chemical out
of the unit to help prevent chemical from drying out and causing build-up. Periodically check and clean chemical strainer and replace if missing.
931108FPS • FPS-MM Asphalt Release Sprayer
February 2nd 2022
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