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Service

Service Intervals

IMPORTANT: Avoid damage! Operating in extreme conditions may require more frequent service intervals:

• Engine components may become dirty or plugged when operating in extreme heat, dust or other severe conditions.

• Engine oil can degrade if machine is operated constantly at slow or low engine speeds or for frequent short periods of time.


Each Use

• Lubricate worm gear.

• Adjust belt tension.

Beginning of Season

• Lubricate chute.

• Lubricate countershaft.

End of Season

• Lubricate worm gear.

• Lubricate chute.

• Lubricate countershaft.

Grease

IMPORTANT: Avoid damage! Use recommended John Deere greases to avoid component failure and premature wear.

The recommended John Deere greases are effective within an average air temperature range of -29 to 135 degrees C (-20 to 275 degrees F).

If operating outside that temperature range, contact your Servicing dealer for a special-use grease.


The following greases are preferred:

• John Deere Multi-Purpose SD Polyurea Grease

• John Deere Multi-Purpose HD Lithium Complex Grease

• John Deere Moly High Temperature EP Grease

If not using any of the preferred greases, be sure to use a general all-purpose grease with an NLGI grade No.2 rating.

Wet or high speed conditions may require use of a special-use grease. Contact your Servicing dealer for information.

Lubricating Worm Gear and Chute


M63873

Apply recommended grease on worm gear (A), and between chute (B) and chute base.

Adjusting Drive Belt Tension


MX15696

1. Pivot tightening lever (A) forward and lock under snowthrower frame to tighten belt.


M63899

2. Loosen nut (B) on left idler.


M63844

3. Loosen jam nut (C).

• Belt tension is correct when idler arm (D) is parallel with welded frame (E) as shown.

4. Adjust nut (F) if needed.

5. Tighten jam nut (C).

6. Tighten nut (B) on left idler, loosened earlier.

Replacing Shear Bolt

IMPORTANT: Avoid damage! Replacement shear bolts must be same as original shear bolts on attachment:

• Softer bolts can shear too easily.

• Harder bolts may not shear and attachment can be damaged.


1. Stop machine.

2. Lock park brake.

3. Remove key.

4. Find and correct the cause for shearing.


M63880

5. Remove spare shear bolt (A) from bracket.


M63890

6. Install new shear bolt (B) in rotor.

Reversing or Replacing Scraper Blade

Reverse scraper blade when edge is rough or worn. Replace blade if it is bent.


M95923A

1. Remove eight bolts (A).

2. Reverse or replace blade (B).

3. Fasten scraper blade with bolts.

Adjusting Worm Gear


M63873

1. Loosen nut (A).

2. Move worm gear against teeth on discharge chute.

3. Tighten nut.

Replacing Auger Drive Belt


M63871

1. Remove six bolts (A) and remove belt cover.

NOTE: If necessary, idler arm can be held up by placing punch in hole (C) behind idler on support plate.


M63870

2. Place wrench on idler bolt (B) and turn clockwise.

3. Remove old belt.

4. Install new belt as shown.

5. Install belt cover.

Replacing Drive Belt

1. Remove snowthrower from machine.


M63833

2. Loosen nuts (A) on idlers to loosen guides (B).

3. Remove belt from idlers.


M63876

4. Loosen bolt (C) and pivot belt guide (D) away from belt.

5. Remove old belt.


M41351

6. Install new belt:

• Put belt around sheave (E) with belt under idler (F).

• Put belt guide (D) close to belt and tighten guide bolt.

NOTE: Support for idlers (G) and (H) needs to be parallel with center line of machine.

V-shaped side of belt goes in groove of idler (G). Flat side of belt goes in groove of idler (H).

• Put belt around idlers (G) and (H) and tighten belt guide bolts.

• Make sure belt is free of twists.

IMPORTANT: Avoid damage! Check position of belt guides after installing attachment on machine. Guides must not touch belt.


7. Install snowthrower.

8. Adjust belt tension.

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