JLG G6-42A Service Manual - Manual (Page 45)

3-7 G6-42A, G9-43A, G10-43A
Boom
15. Between bottom front of first and second boom
sections, feed a rope or wire to both tilt hoses (not
shown) and (if equipped) both auxiliary hoses and
secure to the second or third boom section.
16. Place a suitable sling around the second boom
section. Slowly pull the second and third boom
sections approximately 25% out of the first boom
section. Lower the second and third boom sections
onto a suitable support.
17. Remove all wear pads, shims and backing plates
(12) from the front inside of the first boom section.
Label and tag each set of wear pads being removed.
18. Remove the top and bottom mounting plates (13)
from the front inside of the first boom section. Label
and tag each mounting plate being removed.
19. Relocate sling or using two slings for better stability,
balance two boom sections and slowly pull them out
of first boom section being careful not to damage
hydraulic hoses or chains. Lower second and third
boom sections onto suitable supports.
3.5.2 Third Boom Section Removal
1. Loosen and remove the tilt cylinder hose guide (1)
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.
2. Loosen and remove all retract chain sheave
components (2) and the hydraulic hose rollers
and components.
Note: Offset the extend chain rod to the left or right of
the push beam assembly allowing the push beam to be
raised enough to allow the removal of the chain and
hose sheaves.
3. Attach the Temporary Extend Chain Retention
Bracket (3) between the extend chain rod (4) and the
push beam tube (5). Snug in place. Do Not tighten.
Note: Refer to Section 3.15, “Push Beam Temporary
Brackets,” for Temporary Extend Chain Bracket diagram.
4. At the rear of the boom, remove the retract chain (6)
from the chain clevis.
MY3840
12 12
12 12
13
13
MY3880
1
2
1
MY4070
3
4
5
6