Install - TM-5-5420-279-230923

TM 5-5420-279-23

(12)

Release the hydraulic lines (18 through 22) and electrical cables from the boom by

removing bolts (15, 17 and 25).

(13)

Remove the rod that connects the crane column to the boom. See direct support

maintenance procedure 6-058. Retain the bushes (7) and spacer (8).

(14)

Remove the boom.

(15)

Check al threaded components for wear and damage.

(16)

Check rods (1,9 and 10) for wear and damage.

(17)

Check hydraulic lines (18 through 22) and (26 through 34) for damage.

(18)

Check fittings (2 through 4), (11 through 16) and (23 through 25) for damage.

(19)

Check bushes (7) and spacer (8) for damage and wear.

(20)

Check the boom assembly for cracks corrosion and damage.

Install

(1)

Position the boom assembly on the crane column.

(2)

Fit the rod that connects the crane column to the boom. See direct support maintenance

procedure 6-058. Ensure that bushes (7) and spacer (8) are fitted.

(3)

Fit the hydraulic lines (18 through 22) and electrical cables to the boom with bolts (15, 17

and 25).

(4)

Fit the lift cylinder lever remote control assembly. See direct support maintenance

procedure 6-063.

(5)

Fit rod (9).

(6)

Fit set screw (12) and stop mechanical (11) to rod (9).

(7)

Fit the jib cylinder. See direct support maintenance procedure 6-051.

(8)

Fit the jib boom extension assembly. See direct support maintenance procedure 6-062.

(9)

Fit rod (10).

(10)

Fit shaft (1) with bushes (7) and spacer (8).

(11)

Fit bolts (4), plate retaining (3) and spacer (2).

(12)

Fit the jib cylinder lever remote control assembly. See direct support maintenance

procedure 6-063.

(13)

Fit set screw (12) and stop mechanical (11) to rod (10).

Follow on task

(1)

Check the operation of the crane and check for leaks.

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