TM00358 Rev. A
Chapter 6 - Purge Valve Replacement
L-3 WESCAM
October 2007
All Rights Reserved
107
Replacing the Purge Valve
1. Using a ½” ratchet with the purge valve removal socket, remove the purging valve from the rear door.
2. Spray Loctite® 7649 primer onto threads of new valve and mating surface.
3. Let the Loctite® 7649 primer dry for 5 minutes.
4. Apply Loctite® 561 PST to the bottom 3–5 threads of the new purge valve.
5. Using your fingers, insert the new purge valve and start to thread the fitting.
6. Using a ½” torque wrench with the purge valve removal socket, tighten valve to 30 in-lbs (3.4 Nm).
Table 6-6 Purge Valve Replacement — Tools
Item
Nomenclature
P/N
Manufacturer
Notes
(1)
Purge valve removal socket,
½”–5/8”
13048-01
Wescam
Part alternatives:
• Machine down an impact
socket, deep, 5/8”, 6 point
to an outside diameter of
0.75” to a depth of 1.75”.
• Needle-nose, 8 inch long,
fine-pitch pliers. However,
“pad” plier jaws with
electrical tape to avoid
stripping the purge valve.
(2)
Impact socket, deep, 5/8”, 6 point
SFS201
Snap-on®
(3)
Torque wrench, ½”
–
–
(4)
Ratchet, ½”
–
–
Table 6-7 Purge Valve Replacement — Bulk Items
Item
Nomenclature
P/N
Manufacturer
Notes
(1)
Pipe sealant stick
561
Loctite®
Consult manufacturer’s
Technical Data Sheet for use
instructions and MSDS for
material handling safety.
(2)
Thread sealant activator
7649
Loctite®
Consult manufacturer’s
Technical Data Sheet for use
instructions and MSDS for
material handling safety.
