JLG G6-42A Service Manual - Manual (Page 55)

3-17 G6-42A, G9-43A, G10-43A
Boom
7. Loosen and remove the lock nut, adjustment nut (3)
and belleville washers (4) from the retract chain (5)
at the bottom front of the first boom section.
Note: Note position of belleville washers for reassembly.
8. Secure a rope or wire to the retract chain (5).
9. Loosen and remove the lock nut, adjustment nut (6)
and belleville washers (7) from the extend chain
anchor (8) at the rear of the first boom section.
Note: Note position of belleville washer for reassembly.
Note: Disconnecting one or both extend/retract
hydraulic tubes (9) may be required to gain access to the
hose guide mounting bolts. After removing both hose
guides, re-connect one or both extend/retract hydraulic
tubes BEFORE proceeding.
10. Loosen and remove the tilt cylinder hose guide (10)
and if equipped, the auxiliary hose guide from the
rear of the third second section.
Note: The hose guide mounting bolts also hold the push
pin beams in place.
11. Remove the left and right push beam pins (11).
12. Start the machine and SLOWLY extend the extend/
retract cylinder 1–2 ft (305–609 mm) or until the
push beam assembly can be accessed through the
front of the third boom section.
Note: Only the push beam extend/retract cylinder
assembly should move during this procedure.
13. Shut machine OFF.
14. Properly disconnect the battery.
MAL2670
4 3
5
G6-42A
G9-43A
G10-43A
MAL2660
7
6
8
G6-42A
G9-43A
G10-43A
NOTICE
The extend chain rod will move toward the front of
boom. Do Not allow the rod to come into contact with
the chain and/or chain roller.
MAL1290
10 10
11 11
9
9