Adjust Lower Drive Roll Chain

E67218-UN-07AUG12

450M and 550M Shown

E83536-UN-15JUN17

450M and 550M with Cleaning Auger Shown

A - Idler Sprocket Nut

B - Dimension, 10—16 mm (3/8—5/8 in)

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.

2. To adjust idler sprocket on 450M and 550M:

   • Loosen idler sprocket nut (A).
   • Adjust the idler sprocket to meet total mid-span chain deflection (B) specifications.

     Mid-Span Deflection	Distance	10—16 mm (3/8—5/8 in)

   • Remove one or two links when idler sprocket is within last 10 mm (3/8 in) of slot travel.
   • Tighten idler nut (A) to specification.

     Idler Nut	Torque	163 N·m (120 lb·ft)