John Deere 4045 / 6068 — Replacing Fan and Alternator Belts

Maintenance · Belt drive

For the John Deere 4045 / 6068, from the John Deere owner's manual.

Applies to: John Deere 4045, John Deere 6068

Procedure

1. Inspect belts for cracks, fraying, or stretched-out areas; replace if necessary.
2. With automatic tensioner, release belt tension using breaker bar and socket on tension arm.
3. With manual tensioner, release tension at belt tensioner.
4. Remove poly-vee belt from pulleys and discard.
5. Inspect pulleys and bearings while belt is removed.
6. Install new belt, making sure it is correctly seated in all pulley grooves.
7. Apply tension to belt with tensioner; remove socket.
8. Install fan guard if removed.
9. Start engine and check belt alignment.

Full service-parts list: John Deere 4045 →, John Deere 6068 →

Source: John Deere owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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