TM 9-3990-260-14&P
b.
Installation.
A-frame assembly weighs 400 lbs (182 kg). Do not stand under the A-frame assembly
when raising or lowering. Use the aid of a suitable lifting device when raising or lowering
the A-frame assembly during replacement procedures. Failure to comply may result in
serious injury or death to personnel.
(1)
Attach lifting device to A-frame assembly bail bar (1).
(2)
Check the A-frame assembly (10) to ensure that the holes where the front and rear pins (3
and 11) will be inserted and that the front and rear pins (3 and 11) are clean and completely
free of dirt, sand, or other contamination. Grease the inside of the holes.
(3)
Using lifting device, position A-frame assembly (10) and insert two rear pins (11) through
the A-frame assembly (10). Install washers (15), lock washers (14) and hex nuts (13) finger
tight.
(4)
Tighten each rear pin (11) by turning the hex nut (13) clockwise using 2-1/4" socket (4) and
socket wrench (5) until the hex nut (13) presses firmly against the lock washer (14) and the
split in the lock washer (14) is fully compressed. Turn each hex nut (13) further until hole for
cotter pin is exposed. Install two cotter pins (12).
(5)
Apply a light film of grease (GAA) to front pins (3). (See Appendix K).
(6)
Using assistant and lifting device, position A-frame assembly (10) and insert two front pins
(3) through the A-frame assembly (10). Install washers (9), lock washers (8) and hex nuts (7)
finger tight.
(7)
Tighten each front pin (3) using 2-1/4" socket (4) and socket wrench (5).
(8)
Disconnect and remove lifting device.
(9)
Return the tools to the PLS stowage boxes.
c. Follow-on Maintenance. None.
9-15
