caterpillarTH360B Telehandler Boom Chain Tension -Check/Adjust

SLE1-Up

You must read the warnings and instructions
which are contained in the safety section of this
manual. Before you perform any operation or
maintenance procedures ensure you understand the
warnings and instructions. 

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Check Condition
1. Park the machine on level ground. Fully retract the
   boom and lower the boom.

2. Remove the cover from the rear of the chassis.

3. A limited inspection of the chains can be made
   through the rear of the boom. The boom extension
   chain can be inspected by fully extending the
   boom and looking on top of the intermediate
   section. If the chains are corroded, the chains
   must be removed from the boom for cleaning and a
  full inspection. If the chains require lubricant, the
  chains must be removed from the boom for
  cleaning and a full inspection. Refer to the
  Hydraulic System Systems Operation, Testing and
  Adjusting, "Boom Chain - Clean/Inspect/Lubricate"
  or consult your Caterpillar dealer

、4. Set the minimum distance to 224 mm (8.8 inch)
   between boom section 2 and boom section 3. The
   maximum allowable distance is 234 mm (9.2 inch).
   Tighten extension chain (1) in order to move
   section 3 outward. Tighten retraction chain (2) in
   order to move section 3 inward. If the distance is
   significantly more than 224 mm (8.8 inch), slacken
   both chains and refer to Step 1.

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5. After setting the distance to the required tolerance,
  tighten the extension chain to 20 Nm (15 lb ft).

6. Tighten the retraction chain to 18 Nm (13 lb ft).

7. Tighten the extension chain to 105 ± 5 Nm
   (77 ± 4 lb ft).

8. Tighten the retraction chain to 70 ± 5 Nm (52 ± 4
   lb ft).

9. Extend the boom and retract the boom several
   times. Check the torque for the extension chain.
   Check the torque for the retraction chain.

10. Install the locknut for the extension chain. Torque the
   locknut for the extension chain to 105 ± 5 Nm (77 ±
4 lb ft).

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  11. Install the locknut for the retraction chain. Torque the
  locknut for the retraction chain to 70 ± 5 Nm (52 ±
4 lb ft).

  12. Check the shackles on both chains. If necessary,
  adjust the shackles in order to set the shackles
  horizontally.