JLG G6-42A Service Manual - Manual (Page 48)

Boom
3-10 G6-42A, G9-43A, G10-43A
7. Loosen the Temporary Extend Chain Bracket (9).
8. Apply CAT Thread Lubricant to the clevis mounting
pin (10).
9. Lift the push beam and install the pin and retaining
clips (10) securing the clevis to the third boom
section.
10. Remove the Temporary Retract Chain Bracket (11).
11. Install the tilt cylinder hoses and (if equipped) the
auxiliary hoses through the front of the third boom
section.
Note: Verify the tilt cylinder hoses and (if equipped) the
auxiliary hoses are routed UNDER the hose guide (12)
at the rear of the third boom section at the retract chain
clevis bracket.
12. Snug the Temporary Extend Chain Bracket (9).
13. Install the hose retainer assembly (13) using existing
hardware. Torque as required.
14. Remove caps from the hose retainer fittings and
plugs from the tilt cylinder hoses and (if equipped)
the auxiliary hoses.
15. Connect the tilt cylinder hoses and (if equipped) the
auxiliary hoses to their proper locations. Torque as
required.
16. Install the previously removed wear pads, shims and
spacers (14) at the bottom rear of the third boom
section. Snug mounting bolts. Shim as needed
AFTER boom section is installed. Refer to Section
3.11.2, “Wear Pad Installation and Lubrication,” for
detailed information.
17. Install the previously removed wear pad and spacer
(15) on the left or right side of the third boom section.
Snug mounting bolts. Shim as needed AFTER boom
section is installed. Refer to Section 3.11.2, “Wear
Pad Installation and Lubrication,” for detailed
information.
3.5.5 Third Boom Section Installation
Note: Using a straight bar approximately 20 in
(508 mm) long will aid in the installation of the wear pads
located on the inside front of each boom section.
1. Place the second boom section onto suitable
supports.
2. Lubricate the bottom of the third boom section where
the wear pads of the second boom section contact
the third boom section.
3. Place the sling, or two slings for better stability,
around the third boom section and insert the tilt
cylinder hoses and if equipped, auxiliary hoses into
the second boom section, followed slowly by the
third boom section being careful not to damage any
surrounding components.
MY4060 9
10 11
MY3940
12
MY3900
13
MY3890
14 14
15 15