Remove - TM-5-5420-279-230767

TM 5-5420-279-23

Remove

(1)

Remove the launch frame see direct support maintenance procedure 6-018.

(2)

Remove the access ladders (2, 6 and 8) from the A-Frame.

(3)

Remove the stabilizer feet from the A-Frame stabilizer legs. See unit maintenance

procedure 5-021.

(4)

Remove the fixed walkway (3, 4 and 5) from the rear of the sliding frame, adjacent to the A-

Frame.

(5)

Remove the top layer of the energy chain (12) mounted centrally between the rotate

cylinders (20) under the rear of the launch frame. See unit maintenance procedure 5-097.

(6)

De-pressurize the hydraulic system see unit maintenance procedure 5-118.

(7)

De-pressurize the rotate cylinders (20) see unit maintenance procedure 5-123.

(8)

Note the position of and disconnect the 5 hydraulic and 2 electrical connectors at the A-

Frame lower cross member (10). Fit protective caps to the exposed ends of the hydraulic

and electrical connectors.

(9)

Attach slings and a crane to the A-Frame upper cross member (9) and take the weight with

the crane.

(10)

Disconnect the energy chain mounting brackets (13), which act as the A-Frame rotate

cylinder pin (21) locking plates.

(11)

Fold the energy chain (12) away from the A-Frame and out of the way.

(12)

Support the A-Frame rotate cylinders (20) and remove the cylinder pins (21) that attach

them to the A-Frame see unit maintenance procedure 5-077.

(13)

Withdraw the shoot bolts (15 and 16) that lock the A-Frame to the sliding frame, on the

lower A-Frame cross member.

(14)

Remove the locking plate and pin (14, 19, 17 and 18) from each of the 2 bearings that

attach the A-Frame to the slide frame.

(15)

Lift the A-Frame away from the slide frame with the crane and lay it carefully on suitable

supports with the hydraulic pipes uppermost. Ensure the A-Frame is supported so no

damage will result to the hydraulic pipe work and the electrical harnesses.

(16)

Refer to the relevant maintenance procedure, for carrying out maintenance to the

component parts of the A-Frame assembly.

Install

(1)

Attach slings and a crane to the A-Frame upper cross member (9) and take the weight with

the crane.

(2)

Lift the A-Frame into position on the slide frame.

(3)

Fit the locking plate and pin (14, 19, 17 and 18) for each of the 2 bearings that attach the

A-Frame to the slide frame.

(4)

Engage the shoot bolts (15 and 16) that lock the A-Frame to the slide frame, on the lower

A-Frame cross member.

(5)

Fit the rotate cylinders (20) to the A-Frame see unit maintenance procedure 5-077.

(6)

Fit the energy chain (12) see unit maintenance procedure 5-095.

(7)

Fit the hydraulic and electrical connections (10) at the positions noted during removal.

6-23