Feeder House Variable Speed Drive Belt—Adjusting

NOTE:

H90912
H90912-UN-28FEB08

A - Rubber Boot

B - Bracket

Minor adjustments can be made to variable speed belt by raising idler. If a 3 mm (1/8 in.) gap cannot be reached by raising idler, proceed to next step.

Start engine, engage separator and move engine speed switch to fast idle. Adjust feeder house drive belt to slow front shaft speed.

Disengage separator, stop engine, and remove key.

Lower safety stop and remove left-hand feeder house shields.

Look under rubber boot (A) to verify if upper sheaves are fully open. At low speed position, outer sheave half bulb is against bracket (B).

H90914
H90914-UN-28FEB08

A - Nut

B - Idler

Loosen nut (A) to adjust idler (B) to lower position.

H90967
H90967-UN-05MAR08

A - Nuts (2 Used)

B - Bracket

C - Nuts (3 Used)

Remove and retain nuts (A) and bracket (B).

Loosen nuts (C) to allow upper sheave assembly to move.

NOTE:

H90915
H90915-UN-28FEB08

A - Nut

B - Bracket

C - Nut

Nut (C) must be moved and jammed against nut (A). Together these nuts can be used to turn tensioner bolt.

Loosen nut (A) away from bracket (B) until a 3 mm (1/8 in.) gap exists between either side of bracket.

Tighten nut (C) against nut (A).

H90916
H90916-UN-28FEB08

H84140
H84140-UN-26JUL05

A - Nut

B - Bolt

C - Gap, 3 mm (1/8 in.)

IMPORTANT: Rotate belt while adjusting sheave gap. Failure to rotate belt while adjusting sheave gap results in belt damage.

A gap between sheave halves is important so sheave halves can grip belt when in slow speed position. Cutting platform drive shaft speed must be at slow speed.

Turn nut (A) to adjust bolt (B).

Move upper variable sheaves with bolt until a 3 mm (1/8 in.) gap exists between lower sheave halves or upper sheave assembly reaches end of slots.

H90917
H90917-UN-28FEB08

A - Nut

B - Nut

Tighten nut (A) first and then nut (B).

H90967
H90967-UN-05MAR08

A - Nuts (2 Used)

B - Bracket

C - Nuts (3 Used)

Tighten nuts (C) and install bracket (B) and retain with nuts (A).

IMPORTANT:

H90914
H90914-UN-28FEB08

A - Idler

B - Nut

DO NOT stand on belt while pushing up on idler to set gap.

Raise idler (A) until idler touches drive belt.

Raise sheave an additional 25 mm (1 in.) and tighten nut (B).

H90976
H90976-UN-06MAR08

A - Nut

B - Drive Belt

Tighten adjusting nut (A) to position washer between end of gauge and bottom of step to adjust reel drive belt (B).

Install feeder house shields.

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