John Deere

OMM123336

Issue C6

Snowblowers

47 and 59-Inch for 55 Series Tractors, 670 and 770 Tractors

Introduction

Safety

Preparing Vehicle

Installing

Removing

Operating

Service Safely

Service

Service Intervals

Grease

Gear Oil

Lubricating Worm Gear Shaft

Lubricating Driveline

Lubricating Auger Shaft

Service Snowblower Safely

Checking Auger Gearbox Oil Level

Checking Snowblower Gearbox Oil Level

Replacing Shear Bolts

Replacing Discharge Chute Cables

Routing Chute Cables

Installing Cable Shield

Reversing or Replacing Scraper Blade

Troubleshooting

Storing Machine

Assembly

Specifications

John Deere Service Literature

John Deere Quality Statement

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Service


Service Intervals

25 Hours

ˇ Lubricate worm gear shaft.

ˇ Lubricate driveline.

ˇ Lubricate auger shaft (2 places).


Grease

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

The following greases are preferred:

ˇ John Deere Moly High Temperature EP Grease.

ˇ John Deere High Temperature EP Grease.

ˇ John Deere GREASE-GARD.

Other greases may be used are:

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

ˇ SAE Multipurpose EP Grease.


MIF

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

Gear Oil


TS1412

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:

ˇ API Service Classification GL-5.

ˇ Military Specification MIL-L-2105D.

ˇ Military Specification MIL-L-2105C.

ˇ Military Specification MIL-L-2105B.

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

Lubricating Worm Gear Shaft

IMPORTANT: Avoid damage! Do not over lubricate or you may damage seal.


1. STOP engine.

2. Lower snowblower.

3. Lock park brake.


M31581

4. Lubricate point (A) with John Deere Moly High Temperature EP Grease or equivalent.

Lubricating Driveline

IMPORTANT: Avoid damage! Do not over lubricate or you may damage seals.


1. STOP engine.

2. Lower snowblower.

3. Lock park brake.


M43196

4. Lubricate points (A) with John Deere Moly High Temperature EP Grease or equivalent.

Lubricating Auger Shaft


M62768

Lubricate points (A) with John Deere Moly High Temperature EP Grease or equivalent until it comes out of auger shafts (B) at gearbox.

Service Snowblower Safely

c CAUTION: Avoid injury! DO NOT work on snowblower while it is being operated.

1. STOP tractor.

2. Put PTO lever in OFF position.

3. STOP engine.

4. Lower snowblower to ground.

5. Lock tractor park brake.

6. Remove key.

7. Wait until auger and blower have stopped before you service snowblower.


M43186

8. Keep snowblower clean.

Checking Auger Gearbox Oil Level

1. Park tractor on level surface.

2. STOP snowblower and engine.

3. Lower snowblower to ground.

4. Lock park brake.


M33084

5. Remove check plug (A).

6. Oil should be level with checkplug hole.

IMPORTANT: Avoid damage! Vent in fill plug (B) must be open or pressure will build in gearbox and cause gearbox to leak. Clean fill plug with solvent, if necessary.


7. If oil is low, remove fill plug.

8. Add gear oil specified in this section.

9. Install and tighten fill plug and check plug.

Checking Snowblower Gearbox Oil Level

1. Park tractor on level surface.

2. STOP snowblower and engine.

3. Lower snowblower to ground.

4. Lock park brake.


M43197

5. Remove check plug (A).

6. Use bent wire to check oil level in gearbox. Oil should be 19 mm (3/4 in.) below hole (A).

7. If oil is low, add oil (See this section.)

8. Install and tighten check plug.

Replacing Shear Bolts

NOTE: A shear bolt (A) is installed in each end of auger. The shear bolts will break when snowblower hits a solid object. This protects drive system from damage.

1. If you hit a solid object, STOP snowblower immediately.

2. STOP engine.

3. Lower snowblower.

4. Lock park brake.


M31587

5. Remove broken shear bolt.

6. Find and correct cause for shearing.

IMPORTANT: Avoid damage! Replacement shear bolts MUST BE the same as the original shear bolts on your snowblower. Bolts are grooved to shear at a specific load to prevent damage to gear box. When you install new shear bolt, put both couplings in same position.



M33087

7. Install new shear bolts. Use one of shear bolts (A) stored in rear housing.

Replacing Discharge Chute Cables

1. Start engine.

2. Turn chute 100° to left using SCV lever. Hydraulic cylinder should be completely retracted.

3. Stop engine. Lower snowblower. Lock park brake.


M39140

4. Remove two nuts, washers, and cable shield.


M39141

5. Loosen two cap screws.

6. Disconnect cable ends from chute.


M31572

7. Remove nut (A), bolt and washers (B).

8. Remove cable ends (C) and (D) from pulleys. Remove cable assembly.

9. Install new cable so longer cable end (C) is to left and shorter cable end (D) is to right.

10. Install bolt and washers (B) in cable assembly eyelet.

11. Install and tighten nut (A).

Routing Chute Cables


M31509

1. Move chute so tab (A) on chute is in line with edge of cap screw (B). Chute opening will be to the left.l

2. Route left cable:

ˇ Around top left pulley.

ˇ Around top center pulley.

ˇ Around bottom left pulley.

ˇ Around chute.

ˇ Under tab.

ˇ Behind washer.

3. Use locking pliers to pull cable tight.


M39142

4. Tighten cap screw.


M43199

5. Route right cable:

ˇ Around top right pulley.

ˇ Around bottom center pulley.

ˇ Around bottom right pulley.

ˇ In front of chute.

ˇ Under tab.

ˇ Behind washer.

6. Use locking pliers to pull cable tight.


M33026

7. Tighten cap screw.

Installing Cable Shield


M43200

1. Make sure two flat washers are on cable shield bolts.

2. Install cable shield, two washers, and nuts.


M39140

3. Tighten nuts.

Reversing or Replacing Scraper Blade

NOTE: When edge of blade (A) becomes worn, rough, or bent, reverse blade. If both edges of blade are worn, rough, or bent, replace blade.


M62766

1. Raise snowblower. Put blocks under auger housing to prevent snowblower from falling.

2. Remove nuts (B), and bolts.

3. Install blade. Install bolts and tighten nuts.