Troubleshooting Guide - Haskel AA-8 Instructions De Fonctionnement

Troubleshooting Guide

Symptom
1. Will not run at low air
drive pressures (10 - 15
psi).
2. Pump will not cycle, or
slow cycling.
3. "False" or double cycling
or continuous exhaust
bleeding.
4. Unit will not dead head
(stall).
5. Excessive moisture or
liquid outside of muffler.
Air Driven Air Amplifiers, AA-8, AA-15 & AA-30 • OM-15F
Cause
1. Excess friction of spool o-
rings 568017.
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. Small inlet air supply line.
Restriction not allowing
drive seals to function
properly.
2. High pressure piston
leakage (AA-15, AA-30).
3. High pressure piston
leakage (AA-8).
4. Check valves contaminated
or damaged.
5. Insufficient pressure at
pump inlet.
1. Air filter full of water.
7
Remedy
1. Necessitates relubrication or
replacement of spool o-rings. (See
instruction for removing spool in
Figure 2, steps 1, 2, 3.)
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. 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. 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. 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. Remove, inspect, clean or replace
check valve parts as necessary.
5. See catalog for minimum pump inlet
pressures to maintain efficiency.
1. Drain air filter.