TM 9-1240-271-34&P
HEADREST ASSEMBLIES INSTALLATION
TOOLS: 5/64" socket head screw key (Allen wrench or equivalent)
1/8" and 3/8" flat tip screwdriver
SUPPLIES:
Aircraft and instrument grease (item 1, App A)
PERSONNEL: One
REFERENCES: JPG 41 C for lubrication
EQUIPMENT CONDITION: Support on work bench or in tank and headrest assemblies on work bench
prior to installation in tank
FRAME 1
1
Step
Procedure
NOTE
This procedure is the same for both left and right
headrest assemblies.
Put a small amount of gre0ase on screws (1) and in mounting; holes of bracket (2) (JPG).
1.
2.
Using hand, slide bracket (2) onto plate (3) and line up holes in bracket (2) and plate
(3).
Using fingers, install screws (1), spring washer (4), thrust (flat) washer (5), and stops by
3.
tightening screws (1) into plate (3).
NOTE
Bracket may require a slight rotary movement to allow
the hub of the screw to enter the hole in the bratket.
4.
Using 3/8" screwdriver, tighten screws (1) until there is a noticeable bind between
bracket (2) and plate (3). Do not overtighten; spring washers, will become useless.
5.
Install two disks (6) into set screw hole in plate (3) and push down slightly with 1 /8"
screwdriver.
6.
Using 1 /8" screwdriver or Allen wrench, install two setscrews (7) and tighten until they
prevent rotation of two screws (1) when bracket (2) is rotated.
NOTE
FOLLOW-ON MAINTENANCE
Do performance test (Vol I, para 2-2).
END OF TASK
--
Vol II
