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Page Title:
LHS HOOK ARM DISENGAGES FROM FLATRACK WHILE UNLOADING. (Cont) |
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 TM 9-2320-364-34-1
Do not stand under hook arm. Mechanical failure or
operator error may cause injury or death to personnel.
NOTE
Front boards will be used to aid in measuring
S
the flatrack hook bar height.
Boards are used under the front and rear of
S
the flatrack to ensure the main rails will
be at the same height.
Use of a level (3 ft minimum [92 cm]) is
S
required when leveling flatrack.
Flatrack hook bar height range is given for a
S
hook bar with or without wear.
If hook does not swing toward truck, push
S
hook toward truck and insert pin to hold
in measurement position.
HEIGHT MEASUREMENT TEST
(1) Position flatrack on a flat level surface
with 3 in. by 12 in. by 6 ft boards
under the frame rails, at the front and
rear of the flatrack. Level flatrack
as required from side to side and front
to back. Place level on outside edge
of flatrack frame.
(2) Using a plumb bob, mark a spot on
the board to indicate the bottom center
of the flatrack hook bar.
(3) With the aid of an assistant, measure
vertical distance between the spot on
the board and the bottom center of the
flatrack hook bar.
(a) If measurement is not between
60-13/16 in. and 61-1/8 in.
(154.46 and 155.25 cm), repair
flatrack hook bar, refer to
TM 9-3990-206-14&P. Verify
repair, go to Step (4) of this Fault.
(b) If measurement is between
60-13/16 in. and 61-1/8 in.
(154.46 and 155.25 cm), go to
Step (4) below.
(4) Operate LHS to extended position
(TM 9-2320-364-10).
(5) Remove snapper pin (1), washer (2)
and retaining pin (3) from hook (4)
and hook arm (5).
Allow hook to swing toward truck.
(6) Measure length of hook arm by
measuring from bottom of pin hole to
hook thumb radius.
(a) If hook arm measurement is not
between 22-1/8 in. (561.9 mm)
and 22-3/8 in. (568.3 mm),
replace hook arm. Refer to
Para 16-38. Verify repair, go to
Step 4 of this Fault.
(b) If hook arm measurement is
between 22-1/8 in. (561.9 mm)
and 22-3/8 in. (568.3 mm), fault
not corrected, notify supervisor.
2-415
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