Adjusting Lower Belt Drive Roll Chain

    To ensure that all slack is removed from chains;

  • Close gate and engage PTO a few seconds.
  • Stop tractor engine and remove key.

1. Open left-hand side door.

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2. Loosen idler sheave nut (A).

3. Adjust idler:

  • 457 and 557; Push idler DOWN against chain (B) to specifications.
  • 457S; Push idler UP against chain (B) to specifications.

Specification

Idler-to-Chain -Force 22-44 N (5-10 lb force)

4. Tighten idler nut (A) to specifications.

Specification

Idler Nut -Torque 163 N·m (120 lb-ft)

5. Close left-hand side door.


A-Idler Sheave Nut
B-Chain

E39266

457 and 557

E42506

457S

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