Hay Conditioner Drive Belt - MacDon 912 Operator's Manual

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Table of Contents

HAY CONDITIONER

Hay Conditioner Drive Belt Tension

IMPORTANT: To prolong belt and drive life,

maintain correct belt tension.

When properly tensioned, coils on spring (C) must

be fully compressed. Check belt tension every 50

hours, or weekly.

To adjust:

1. Loosen rear nut (A) on adjuster.

2. Turn nut (B) clockwise until spring coils (C) are

compressed, then turn nut (B) an additional two

turns for proper tension.

3. Tighten nut (A) to lock the position.

NOTE: Nut (D) must not be over tightened as

assembly pivots at this point.

Replacing Hay Conditioner Drive Belts

It is not necessary to detach conditioner from

header to replace the belts. Proceed as follows:

1. Never pry belt over pulley.

2. Loosen nut (B). Turn nut (A) to fully loosen the

adjuster.

3. Apply rearward force on spring at (E), (pushing

with wrench works well) to "pop" spring off of

retaining nut. This allows full retraction of idler

for belt removal and installation.

NOTE: Removing the spring-loaded idler allows

easier belt removal and installation. If idler is

removed, take note of hardware positioning for

re-assembly.

4. To remove belt, loosen rear bolt (F) on link

between conditioner frame and gearbox.

Remove forward bolt (G) and pivot the link back

and out of the way. Pivot the gearbox back to

make sufficient clearance between header and

box for belt removal.

5. Remove bolt (H) at lower shield and pivot

shield down to allow removal of belt from lower

driven pulley.

6. Install belt, reassemble shield, link and idler

spring. Adjust belt tension as above.

7. Re-adjust belt tension after a short run-in

period, (about 5 hours).

Form # 46620

MAINTENANCE/SERVICE