Chopper Drive Speeds-Changing

causym CAUTION: Shut OFF engine, set parking brake and remove key.

NOTE: Machine is shipped from the factory with a three strand belt, which is set for high chopping speed. If slow chopping speed is desired, order a one strand belt from your John Deere dealer.

When changing chopper speeds make sure to cycle power ON and OFF. Combine will now recognize the new speed range.

Release chopper drive belt tension.

Pull arm (A) down, outward and up to release belt tension.

Install rubber strap (B) in slot to hold arm in the detensioned belt position.


A-Arm
B-Rubber Strap

H72560
H78535

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Release latch (A) and lift shield (B) over pins (C).

Remove pin (D) from shield (E) and remove shield from bracket (F).

For High Speed (3200 rpm):

NOTE: Install three strand belt on outside sheave grooves for high speed.

Install belt on outside sheave grooves (G), idlers (H) and outside sheave grooves (I).

  • Grain
For Low Speed (1600 rpm):

NOTE: Install one strand belt on inside sheave grooves for slow speed.

Install belt on inside sheave grooves (G), idlers (H), and inside sheave grooves (I).

  • Corn

Install chopper shields.

Remove rubber strap from slot in arm and pull arm down to put tension on belt. Check belt idler tension spring to gauge. Washer on rear of spring should be even with gauge. Adjust as required.


A-Latch
B-Shield
C-Pins
D-Quick-Lock Pin
E-Shield
F-Bracket
G-Sheave
H-Idlers
I-Sheave

H72013
H71849
H71850

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