Haskel AAD-2 Instructions De Fonctionnement page 6

NOTE: Care must be taken in disassembly and assembly that the flow and pilot tube o-rings be on the
flow and pilot tubes prior to assembly. Alternately (cross-wise) torque tie rods to a maximum torque of 16-
18 foot pounds.
Check Valves
Remove and inspect parts (Ref. dwg. 27360). Replace 28119 seats if damaged.
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. Amplifier will not dead head
(stall)
5. Excessive moisture or liquid
outside of muffler.
6. Excessive bleeding out
diaphragm vent.
7. Excessive "drag" noise.
Air Driven Air Amplifiers, AAD-2 & AAD-2-C • OM-9F
Cause
1. Excess friction of spool o-
rings 568017.
1. Leakage of flow and/or pilot
tubes.
2. "Iced up" exhaust vent.
3. Indication that one or both
pilot valves are
malfunctioning.
4. Build-up of residue in muffler.
1. Small inlet air supply piping
magnifies any internal
leakage.
2. Pilot stem valve damaged.
1. Check valves contaminated
or damaged.
1. Air filter full of water.
1. Piston rod seal leakage.
1. Damaged piston seal 27363.
6
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 ice.
3. Remove pilot valves, inspect
and repair per instructions in
maintenance section.
4. Remove muffler,
disassemble and clean.
1. Increase air inlet piping and
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. See steps 1, 2, 3 – Pilot
system maintenance.
1. Remove, inspect, clean or
replace check valve parts as
necessary.
1. Drain air filter.
1. Replace diaphragm rod
seals. (Ref. dwg. 27379.)
1. Replace. (Ref dwg. 27369.)