JLG 534D-10 - Manual (Page 54)

Boom
3.26 534D-9, 534D-10 & 544D
18. Connect the 3/4 in (19 mm) retract chain (4) to the
clevis at the rear of the fourth boom section.
19. Connect the chain to the chain clevis and the clevis
to the chain adjustment block.
20. The initial set-up from the jam nut to the back of the
clevis pin is 3/4 in (19 mm).
21. Adjust the nut until the gap between the nut and the
washer is 1/4 in (6,4 mm).
22. Torque the jam nut to 100 lb-ft (135 Nm). Lubricate
the clevis threads with Anti-Seize Compound.
23. Lay out and lubricate the two 1 in (25 mm) extend
chains. Make sure the chain has been inspected and
meets the adjustment parameters in Section 3.12,
“Boom Extend and Retract Chains - Four Section.”
24. Attach the rear chain clevis to the chains.
3.10.10 Second Boom Section Install
1. Place the clean and inspected second boom section
on suitable supports.
2. Grease the inside wear pad paths.
3. Using a suitable sling, lift and position the fourth and
third boom sections in front of the second boom
section.
4. Attach the chain clevis (5) to the top rear of the third
boom section.
5. Slowly insert the fourth and third boom sections into
the second boom section.
6. Bolt the chain adjustment block (6) to the bottom of
the boom and torque the bolts to 340 - 365 lb-ft
(460 - 495 Nm).
7. Install the top front wear pads to the second boom
section. DO NOT torque the pad bolts.
8. Install the bottom front wear pad supports. DO NOT
torque the pad support bolts.
9. Install the bottom front wear pads. DO NOT torque
the pad bolts.
10. Install the front side wear pads.
11. Torque all the front wear pads and supports.
12. Shim the rear wear pads on the third boom section if
needed and torque to 68-78 lb-ft (92 - 106 Nm).
13. Lay out and lubricate the 1 in (25 mm) chain on the
bottom of the second boom section.
14. Install the bottom rear wear pads. DO NOT torque
the pad bolts.
15. Install the top rear wear pads. DO NOT torque the
pad bolts.
16. Install the lube fittings to the wear pad and chain
roller assembly.
17. Connect the chain clevis (7) to the second boom
section.
18. Assemble the rear bottom chain roller (8) to the
second boom section.
19. Install the side rear wear pads on the second boom
section. DO NOT torque the pad bolts.
20. Install the optional hose sheave (9) if equipped, to
the right rear of the second boom section.
21. Install the standard hose sheave (9) to the left rear of
the second boom section.
22. Attach the hoses, and optional auxiliary hoses and
electrical cable if equipped to the hose carrier
assembly at the rear of the boom.
MX0440
6
MX0450
8
7