Install - TM-5-5420-279-230911

TM 5-5420-279-23

(9)

Remove the snap ring (14) securing the pivot pin (15) of cylinder one (13) to the jib box

bracket (17).

(10)

Disengage the extension cylinder assembly (3) from the slide (18) on the jib box (1).

(11)

Lift the extension cylinder assembly (3) off the jib box (1) and clear of the grooves (20) in

extension piece one (19).

(12)

Check all pins and snap rings for damage and wear.

(13)

Check the jib box slide for damage.

(14)

Check the threads on the bolt and in extension piece two (10).

Install

(1)

Position and engage the extension cylinder assembly (3) on the jib box slide (18).

(2)

Place the extension cylinder assembly in the groove (20) on extension piece one (19).

(3)

Connect cylinder one (13) to the jib box bracket (17) and insert the pivot pin (15).

(4)

Fit the snap ring (14) to pivot pin (15).

(5)

Connect cylinder two (16) to extension piece two (10) and insert the pivot pin (12).

(6)

Fit the snap ring (11) to pivot pin (12).

(7)

Replace the lock washer (9) and bolt (8) in extension piece two (10).

(8)

Connect cylinder three (6) to extension piece three (7) and insert the pivot pin (5).

(9)

Fit the snap ring (5) to pivot pin (4).

(10)

Connect the three hydraulic hoses (2) to the extension cylinder assembly (3).

(11)

Grease all pivot points and slides.

Follow on tasks

(1)

Operate the crane in accordance with the operator's manual TM 5-5420-279-10.

(2)

Check for leaks.

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