TM55-4920-432-13&P
4-20 ALTIMITER SHUT-OFF VALVE
4-20
THIS TASK COVERS: REMOVAL AND INSTALLATION
Initial Set-Up:
Personnel Required:
68F Aircraft Electrician
or
35H TMDE Support Specialist
Tools and Equipment:
Tool Kit (B2) or Shop Set (B4)
Material/Parts:
Shut off valve, Tape (9)
Equipment Condition:
Power disconnected, control panel open
1.
REMOVAL:
a.
Remove screw (1) from end of knob (2), loosen two allen screws mounted on side of knob, then
remove knob from valve.
b.
Remove mounting screws (3) from panel (4).
c.
Disconnect hoses from valve fittings.
d.
Remove elbow fittings (6) from valve.
e.
Remove tee fitting (7) from valve.
2.
INSTALLATION:
a.
Apply tape (D9) to fittings (6 & 7).
b.
Install fittings into valve.
c.
Install rubber hose to fittings before mounting valve.
d.
Position valve (5) into panel (4) per note and secure it. with four screws (3).
e.
Place knob (2) on valve stem and orient to panel and stem position. Tighten two allen screws to
valve stem flats.
f.
Install screw (1) through knob to valve stem.
g.
Install rubber hoses back to their respective location, If needed use pneumatic system diagram fig.
C-4.
Performance check (para. 2-5)
GO TO NEXT PAGE
4-18
