Air Driven Air Amplifiers, AA-8, AA-15 & AA-30 • OM-15J
7
Troubleshooting Guide
Symptom Cause
Remedy
1. Will not run at low air
drive pressures (10 - 15
psi).
1. Excess friction of spool o-
rings 568017.
1. Necessitates relubrication or
replacement of spool o-rings. (See
instruction for removing spool in
Figure 2, steps 1, 2, 3.)
2. Pump will not cycle, or
slow cycling.
1. Leakage of flow and/or pilot
tubes.
2. Indication that one or both
pilot valves are
malfunctioning.
3. Build-up of residue in
muffler.
1. Replace o-rings on flow pilot tubes.
2. Remove pilot valves, inspect and
repair per instructions in maintenance
section.
3. Remove muffler, disassemble and
clean.
1. Small inlet air supply line.
Restriction not allowing
drive seals to function
properly.
1. Increase air inlet piping to 1/2”. Test.
Replace o-rings in the following order
(test each step):
a. No. 568015 o-ring inside hex
exhaust port fitting.
b. Spool o-rings No. 568017.
c. Sleeve o-rings No. 568020. (See
instructions for removing and
replacing o-rings.)
2. High pressure piston
leakage (AA-15, AA-30).
2. Shutoff drive air and remove muffler
and cycling spool
completely. Apply
pressure to pump inlet only. If leakage
flow is audible out of spool cavity,
replace pump piston parts per
individual assembly drawing.
3. High pressure piston
leakage (AA-8).
3. Remove 3/8” O.D. tube at branch of
inlet tee. Plug branch of tee. Apply
inlet pressure to tee. If leakage flow is
audible out of 3/8” tube, replace pump
piston seal parts per individual
assembly drawing.
4. Check valves contaminated
or damaged.
4. Remove, inspect, clean or replace
check valve parts as necessary.
3. “False” or double cycling
or continuous exhaust
bleeding.
4. Unit will not dead head
(stall).
5. Insufficient pressure at
pump inlet.
5. See catalog for minimum pump inlet
pressures to maintain efficiency.
5. Excessive moisture or
liquid outside of muffler.
1. Air filter full of water.
1. Drain air filter.
