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

3-7 G6-42A, G9-43A, G10-43A
Boom
15. Between the bottom front of the 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 the sling or using two slings for better
stability, balance the two boom sections and slowly
pull them out of the first boom section being careful
not to damage the hydraulic hoses or chains. Lower
the 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 3.16, “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.
5. Loosen and remove the tilt hoses and (if equipped)
auxiliary hoses from the hose retainers (7 & 8) at the
front of the third boom section.
MY3840
12 12
12 12
13
13
MY3880
1
2
1
MY4070
3
4
5
6
MY4110
8 7