Service


· Beginning of Season:	· Adjust and lubricate drive chain. · Check gear case oil level. · Lubricate Auger Shaft
· Every 25 Hours and End of Season:	· 400 Series and F900 Series: Lubricate three grease points on driveline. · 300 Series, 420 and 430: Lubricate two grease points on driveline.

Grease

Use grease based on the expected air temperature range during the service interval.

The following greases are preferred:

· John Deere Moly High Temperature EP Grease.

· John Deere High Temperature EP Grease.

· John Deere GREASE-GARD.

Other greases may be used are:

· SAE Multipurpose EP Grease with 3 to 5 percent molybdenum disulfide.

· SAE Multipurpose EP Grease.

MIF

· Greases meeting Military Specification MIL-G-10924C may be used as arctic grease.

Gear Oil

M74991

Use oil viscosity based on the expected air temperature range during the period between oil changes.

John Deere GL-5 Gear Lubricant is recommended.

Other oils may be used if they meet one or more of the following:

· API Service Classification GL-5.

· Military Specification MIL-L-2105D.

· Military Specification MIL-L-2105C.

· Military Specification MIL-L-2105B.

Oils meeting Military Specification MIL-L-10324A may be used as arctic oils.

Adjusting and Lubricating Drive Chain

c CAUTION: Avoid injury! Do not operate snowblower without chain shield.

1. STOP engine.

2. LOCK park brake.

3. Remove key.

4. Disconnect drive shaft.

5. Push chain shield left to provide tension on the chain. Deflection should be 4.7-10 mm (3/16-3/8 in.).

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6. Adjust chain, if necessary:

· Loosen chain shield (A) by loosening four lock nuts (B) on chain shield.

· Slide chain shield right or left until deflection measurement is right.

· Hold chain shield in place and tighten nut.

7. Rotate snowblower several turns and make sure chain has at least 4.7 mm (3/16 in.) deflection at all times.

8. Lubricate chain with John Deere TY6240 Chain Lube Spray or equivalent.

9. Start engine. Run snowblower briefly to distribute oil.

10. STOP engine. Wipe off excess oil.

11. Check condition of chain and sprockets.

Checking and/or Adding Gear Box Oil

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1. Remove filter plug (A). Oil should be even with bottom of hole.

2. If oil is low, add 80W-90 GL-5 Gear Oil.

3. Install plug.

Lubricating Auger Shaft

M55283

· Lubricate grease fittings (A) with John Deere Moly High Temperature EP Grease or an equivalent.

Lubricating Driveshaft

Lubricate driveshaft grease fittings with John Deere Moly High Temperature EP Grease or an equivalent as shown:

M47432

· 400 and F900 Series: Lubricate two fittings (A) and one fitting (B).

M47433

· 300 Series, 420 and 430: Lubricate two fittings (A).

Replacing Shear Bolt

When auger hits an object, shear bolt may break. This helps prevent damage to rotor and snowblower. If you break a shear bolt, do the steps listed below:.


IMPORTANT: Avoid damage! Replacement shear bolts MUST BE same as original shear bolts on your snowblower: · Softer bolts may shear too easily. · Harder bolts may not shear: snowblower may be damaged.

1. DISENGAGE PTO to stop snowblower immediately.

2. STOP the tractor.

3. Lower snowblower to the ground.

4. LOCK the park brake.

5. STOP the engine.

6. Wait for ALL moving parts to STOP.

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7. Remove broken shear bolt (A), one on each end, or (B) in center.

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8. Turn auger or blower impeller to line up holes in shaft. Remove spare shear bolt (C) from snowblower.

9. Install bolt and nut. Tighten so that the two paddles that the shear bolts connect are touching. DO NOT OVERTIGHTEN nut.

10. Find and correct the cause for shearing.

Reversing and/or Replacing Scraper Blade

1. Check scraper blade for wear or damage.

2. Raise snowblower.

3. Place wood blocks under collector assembly.

4. Lower snowblower onto blocks.

M55267

5. Remove nuts from carriage bolts (A).

6. Turn scraper blade (B) end-for-end or replace blade if both sides are worn.

7. Install scraper blade.

8. Tighten nuts on carriage bolts.

Removing Discharge Chute Cables

NOTE: When removing the black cable shield (A) an angle bracket will fall from underneath the snowblower. This bracket needs to be installed again when the black cable shield is installed.

M55268

1. Remove black cable shield (A) and angle bracket by removing four hex head bolts (B) and lock nuts.

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2. Loosen two lock nuts (C), from threaded studs on discharge chute.

NOTE: For ease of reassembly and proper cable routing, remove one cable at a time.

3. Remove each cable (D) from snowblower.

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4. Remove cables from pulleys (F).

5. Install new cables on pulleys. (See Replacing Discharge Chute Cables in this section.)

Replacing Discharge Chute Cables

(Right-Hand)

NOTE: For ease of reassembly and proper cable routing, replace one cable at a time.

When replacing discharge chute cables, route RIGHT-HAND cable around snowblower FIRST.:


IMPORTANT: Avoid damage! Hydraulic cylinder plunger MUST BE in the RETRACTED position (all the way in the cylinder) when beginning this procedure.

1. Turn snowblower discharge chute to the LEFT (as viewed from tractor/front mower seat).

M55286

2. Standing at rear of snowblower, put cable (A) through hole (B).

3. Wrap cable around middle pulley (C), and around right-hand pulley (D).

4. Wrap cable counterclockwise around discharge chute and put it around threaded stud and behind washer and lock nut (E).

(Left-Hand)


IMPORTANT: Avoid damage! Hydraulic cylinder plunger MUST BE in the RETRACTED position (all the way in the cylinder) when beginning this procedure.

NOTE: For ease of reassembly and proper cable routing, replace one cable at a time.

1. Turn snowblower discharge chute to the LEFT (as viewed from tractor/front mower seat).

M55285

2. Standing at rear of snowblower, put cable (A) through hole (B).

3. Wrap cable around middle pulley (C), and around left-hand pulley (D).


IMPORTANT: Avoid damage! Make sure you install the long bolts through the black cable shield and bracket.

4. Wrap cable clockwise around discharge chute and put it around threaded stud and behind lock nut and washer (E).

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5. Install cable shield (F) and angle bracket and fasten with four hex head bolts (G) and lock nuts.

6. Tighten nuts.