FasTest FasMate FX Series Thumb Valve Rebuild - Manual (Page 2)

REBUILD INSTRUCTIONS
Roseville, MN
Ph: 1-800-444-2373
Fax: 651-645-7390
www.fastestinc.com
WP126, Rev A, 10/2/2013
NOTE: YOU MAY NOT NEED ALL SEALS CONTAINED WITHIN THIS KIT.
STANDARD REBUILD KIT FOR SEVERAL THUMB VALVE
CONNECTORS.
DISASSEMBLY:
1. Unthread valve housing assembly from connector. Remove and
discard o-ring (a) from connector.
2. CAUTION: With pilot airline still attached to housing, wrap valve
housing in a rag and push thumb valve (PILOT PRESSURE WILL
PUSH PISTON OUT) to remove piston inside housing. FX Valve
Housings do not have pistons!! Remove and discard o-ring (b).
3.
Using a punch pin or like tool (Ø3/32” OR SMALLER), press spring
pin out of housing and discard. Then pull valve cartridge out of the
housing.
4. Remove c-clip retaining ring from valve cartridge. Discard c-clip,
spring and all o-rings. Be careful to not scratch o-ring grooves.
REASSEMBLY:
Lube all o-rings with a petroleum based lubricate.
1. Install new o-rings onto valve piston and body. NOTE SIZE
DIFFERENCE and LOCATION BETWEEN O-RING (c) & (d)!
2. Install new spring into body, push piston down into body and attach
new c-clip.
3. Install rebuilt valve into housing using your thumb; make sure valve is
seated all the way into housing! Also install new o-ring onto piston
and gently push piston into housing.
4. Using a punch pin or like tool press new spring pin into place on the
housing.
VALVE
HOUSING ASSY
PISTON
SPRING PIN
O-RING (a)
O-RING (c)
O-RING (d)
PISTON
BODY
C-CLIP
HOUSING
PISTON
O-RING (b)