JLG G6-42A Service Manual - Manual (Page 56)

Boom
3-18 G6-42A, G9-43A, G10-43A
20. Place a sling around the push beam - extend/retract
cylinder assembly. Lift and slowly pull the push beam
- extend/retract cylinder assembly approximately half
way out of the boom assembly. Lower the push
beam onto a suitable support.
21. Relocate the sling or using two slings for better
stability, balance the push beam - extend/retract
cylinder assembly and slowly pull the push beam -
extend/retract cylinder assembly out of the boom
assembly. Lower the push beam - extend/retract
cylinder assembly onto suitable supports.
22. Remove the extend/retract cylinder as required.
3.7.2 Push Beam - Extend/Retract Cylinder
Installation
1. Clean and lubricate the bottom and sides of the third
boom section where the push beam guide bar
travels.
2. Place a sling or using two slings for better stability,
lift and slowly push the push beam - extend/retract
cylinder assembly approximately half way into the
boom assembly. Lower the push beam onto a
suitable support.
3. Relocate the sling and slowly insert the push beam -
extend/retract cylinder assembly into the front of the
boom assembly.
4. Remove the plugs and caps from the extend/retract
cylinder hydraulic tubes. Install both extend/retract
cylinder hydraulic tubes.
5. Install the strong back (1) with the previously
removed hardware (2) and torque as required.
6. Align the extend/retract cylinder bore with the strong
back bores and install the extend/retract cylinder pin
(3) and secure with the retaining clips (4).
7. Install the anchor rod through the front of the boom
assembly.
8. Connect the extend chain (5) to the anchor rod (6).
9. Install the guide bar (7) and chain retainer (8) to the
front of the push beam with the previously removed
hardware (9).
10. Properly connect the battery.
11. Start the machine and SLOWLY retract the extend/
retract cylinder until the push beam assembly bores
can be aligned with boom sections access bores.
12. Properly disconnect the battery.
NOTICE
Guide the push beam - extend/retract cylinder
assembly over the top of the retract chain anchor at
the rear of the third boom section being careful not to
damage any components.
NOTICE
Guide the push beam - extend/retract cylinder
assembly over the top of the retract chain anchor at
the rear of the third boom section being careful not to
damage any components.
MAL1290
4
1
3
4
2
2
2
MY3930
7
5
6
8
9