Service Instructions
Note: This kit is for the Aerofiner II & III air dryer which contains a
repairable check valve.
AEROFINER II & III
Air Dryer Check Valve Repair Kit
L31196
4/03
Step 1:
Loosen the connections at the
inlet and outlet of the air dryer and bleed
the system. After relieving the air system
pressure, remove the hose line and/or
adapter from the 3/4” female NPTF outlet
port. Remove the retaining ring (item 4)
with snap ring pliers. Remove the spring
(item 3) and poppet O-Ring assembly
(item 2 and 1).
Step 2:
Install the new O-Ring onto the
poppet and coat the entire O-ring/poppet
assembly with a light petroleum grease.
The sealing surface in the valve body
must be smooth and clean. Inspect
thoroughly before installing new check
valve components.
➮
Continued on reverse side
Item Part Number Quantity
Description
1
N11728
1
O-Ring
2
FF9860-38
1
Poppet
3
FF9860-39
1
Spring
4
44W16088
1
Retaining Ring
5
L31196
1
Service Instructions
Kit Contents:
