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 TM 5-5420-279-23
a.
Remove
(1)
Remove the launch frame see direct support maintenance procedure 6-018.
(2)
Remove the A-Frame (1) from the launch vehicle see direct support maintenance
procedure 6-006.
(3)
Determine which leg of the A-Frame is to be removed, this procedure applies to either leg.
(4)
De-pressurize the folding cylinders (4) see unit maintenance procedure 5-123.
(5)
Note the position of, and disconnect the flexible hydraulic hoses at the bulkheads (2)
adjacent to the hinge points in the upper and lower A-Frame cross members. Fit protective
caps to the exposed ends of the hydraulic connectors.
(6)
Remove the inner braked support roller (5) on the lower A-Frame cross member. See unit
maintenance procedure 5-018.
(7)
Disconnect electrical harnesses at the A-Frame junction box as required. Refer to unit
maintenance procedure 5-139.
(8)
Disconnect electrical harness mounting brackets to the lower leg cross member as
required.
(9)
If removing the left-hand stabilizer leg, disconnect the electrical connection to the lower
emergency stop (7).
(10)
Disconnect the relevant A-Frame folding cylinder (6) from the stabilizer leg being removed
see unit maintenance procedure 5-014.
(11)
Remove the upper and lower pivot pins (4) (one in each A-Frame cross member) by first
removing the clamp plate then withdrawing the pin.
(12)
Remove the upper and lower pivot lock pins (3) (one in each A-Frame cross member
adjacent to the pivot pin).
(13)
The A-Frame stabilizer leg can now be lifted clear of the A-Frame (1).
(14)
Refer to the relevant maintenance procedure for the sub assemblies of the A-Frame
Stabilizer Leg.
b.
Install
(1)
Fit the A-Frame stabilizer leg to the A-Frame (1) with the crane and slings.
(2)
Fit the upper and lower pivot lock pins (3) (one in each A-Frame cross member adjacent to
the pivot pin).
(3)
Fit the upper and lower pivot pins (4) (one in each A-Frame cross member).
(4)
Fit the relevant A-Frame folding cylinder (6) to the stabilizer leg see unit maintenance
procedure 5-014.
(5)
Fit the electrical connection to the lower emergency stop (7) on the left-hand stabilizer leg if
applicable.
(6)
Fit the electrical harness mounting brackets to the lower leg cross member as required.
(7)
Fit the electrical harnesses at the A-Frame junction box as required.
(8)
Fit the inner braked support roller (5) on the lower A-Frame cross member. See unit
maintenance procedure 5-018.
6-28
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