John Deere 655, 755, 855, 955, 756 Technical Manual

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Page 1

655, 755, 855, 955,

756 and 856 Compact

Utility Tractors

TECHNICAL

MANUAL

John Deere

Lawn & Grounds Care Division

TM1360 (June 1996)

Litho in U.S.A

Page 2

FOREWORD

Introduction

This manual is written for an experienced technician. Essential tools required in performing certain service work are identified in this manual and are recommended for use.

LIVE WITH SAFETY: Read the safety messages in the introduction of this manual and the cautions presented throughout the text of the manual.

This is the safety-alert symbol. When you see this symbol on the machine or in this manual,

be alert to the potential for personal injury.

Technical manuals are divided in two parts: repair and diagnostics. Repair sections tell how to repair the components. Diagnostic sections help you identify the majority of routine failures quickly.

Information is organized in groups for the various components requiring service instruction. At the beginning of each group are summary listings of all applicable essential tools, service equipment and tools, other materials needed to do the job, service parts kits, specifications, wear tolerances, and torque values.

Binders, binder labels, and tab sets can be ordered by John Deere dealers direct from the John Deere Distribution Service Center.

This manual is part of a total product support program.

FOS MANUALS—REFERENCE TECHNICAL MANUALS—MACHINE SERVICE COMPONENT MANUALS—COMPONENT SERVICE Fundamentals of Service (FOS) Manuals cover basic

theory of operation, fundamentals of troubleshooting, general maintenance, and basic type of failures and their causes. FOS Manuals are for training new personnel and for reference by experienced technicians.

Technical Manuals are concise guides for specific machines. Technical manuals are on-the-job guides containing only the vital information needed for diagnosis, analysis, testing, and repair.

Component Technical Manuals are concise service guides for specific components. Component technical manuals are written as stand-alone manuals covering multiple machine applications.

NOTE: The 756 and 856 tractors are identical to the

755 and 855 tractors; therefore, all information pertaining to the 755 also pertains to the 756 and the same is true for the 855 and the 856 tractors. The 655, 756 and 856 tractors were all discontinued before the late model 755 and 855 tractors and the new 955 tractors were produced. Therefore, any late model references do not include the 655, 756, and 856 tractors.

MX,TM1360,IFC -19-16OCT91

TM1360 (16OCT91) 55, 56 Series Tractors

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SECTION 10—GENERAL INFORMATION

Group 05—Safety Group 10—Repair Specifications Group 15—Repair Information Group 20—Fuels, Lubricants, and Coolants Group 25—Serial Number Locations

SECTION 20—DIESEL ENGINE REPAIR

Group 05—Yanmar Diesel Engine Repair Group 10—Remove and Install Oil Cooler Group 15—Remove and Install Radiator Group 20—Remove and Install Diesel Engine

SECTION 30—FUEL AND AIR REPAIR

Group 05—Fuel Transfer Pump Group 10—Fuel Tank Group 15—Fuel Tank Tube and Sender Group 20—Air Cleaner

SECTION 40—ALTERNATOR REPAIR

Group 05—Alternator Repair Specifications Group 10—Alternator Installation

SECTION 80—MISCELLANEOUS REPAIR

Group 15—Operator’s Seat Group 20—European Roll-Gard

Group 25—German Rear Hitch Group 30—3-Point Hitch

SECTION 210—MACHINE OPERATIONAL

CHECKOUT PROCEDURE

Group 05—Machine Operational Checkout

Procedure

SECTION 220—ENGINE/FUEL OPERATION AND

TESTS

Group 05—Engine Systems Operational Checkout

Procedure

Group 10—Engine System Diagnosis

SECTION 240—ELECTRICAL OPERATION

AND TESTS

Group 05—Electrical System Checkout Group 10—Electrical System Diagnosis Group 15—Theory of Operation

SECTION 50—POWER TRAIN REPAIR

Group 05—Hydrostatic Transmission Group 10—Transaxle Group 15—Final Drives Group 20—Mechanical Front Wheel Drive

(MFWD) Group 25—Power Train Gears and Shafts Group 30—Speed Control Linkage

SECTION 60—STEERING AND BRAKES REPAIR

Group 05—Standard Front Axle Group 10—Steering Valve Group 15—Brake Linkage

SECTION 70—HYDRAULICS REPAIR

Group 05—Hydraulic Pump Group 10—Flow Divider and Selective Control

Valves (SCV’s) Group 15—Rockshaft Group 20—Hydraulic Hoses

All information, illustrations and specifications in this manual are based on the latest information available at the time of publication. The right is reserved to make changes at any time without notice.

TM 1360-19-01Jun 96

SECTION 250—POWER TRAIN OPERATION

AND TESTS

Group 05—Power Train System Checkout Group 10—Power Train Tests and Adjustments Group 15—Theory of Operation

SECTION 260—STEERING AND BRAKE

OPERATION AND TESTS

Group 05—Steering and Brakes System Checkout Group 10—Steering and Brakes Tests and

Adjustments

Group 15—Theory of Operation

SECTION 270—HYDRAULIC OPERATION

AND TESTS

Group 05—Hydraulic System Checkout Group 10—Hydraulic System Tests and

Adjustments

Group 15—Theory of Operation

INDEX

DEERE & COMPANY

Moline, Illinois

A John Deere ILLUSTRUCTION Manual

Previous Editions

210

220

Page 4

240

250

260

270

Contents

INDX

Page 5

Contents

Page

Section 10

General Information

Page

Group 05—Safety

Safety Items. . . . . . . . . . . . . . . . . . . . . . . . .10-05-1

Group 10—Repair Specifications

General Tractor Specifications. . . . . . . . . . .10-10-1

Group 15—Repair Information

Metric Fastener Torque Values. . . . . . . . . . .10-15-1

Inch Fastener Torque Values . . . . . . . . . . . .10-15-2

O-Ring Face Seal Fittings . . . . . . . . . . . . . .10-15-3

O-Ring Boss Fittings . . . . . . . . . . . . . . . . . .10-15-4

Group 20—Fuels, Lubricants, and Coolants

Diesel Fuel—North America. . . . . . . . . . . . .10-20-1

Diesel Fuel Lubricity—North America . . . . .10-20-1

Diesel Fuel Storage—North America. . . . . .10-20-1

Diesel Fuel—Europe . . . . . . . . . . . . . . . . . .10-20-2

Diesel Fuel Lubricity—Europe . . . . . . . . . . .10-20-2

Diesel Fuel Storage—Europe . . . . . . . . . . .10-20-2

Engine Oil—North America . . . . . . . . . . . . .10-20-3

Engine Oil—Europe . . . . . . . . . . . . . . . . . . .10-20-4

Break-in Engine Oil—North America . . . . . .10-20-5

Break-in Engine Oil—Europe. . . . . . . . . . . .10-20-6

Hydrostatic Transmission and

Hydraulic Oil— North America. . . . . . . . . .10-20-7

Hydrostatic Transmission and

Hydraulic Oil— Europe . . . . . . . . . . . . . . .10-20-8

Gear Case Oil (MFWD)—North America. . . 10-20-9

Gear Case Oil (MFWD)—Europe. . . . . . . .10-20-10

Grease—North America. . . . . . . . . . . . . . . 10-20-11

Grease—Europe . . . . . . . . . . . . . . . . . . . .10-20-12

North America

Alternative Lubricants. . . . . . . . . . . . . . . . .10-20-13

Synthetic Lubricants. . . . . . . . . . . . . . . . . .10-20-13

Lubricant Storage. . . . . . . . . . . . . . . . . . . .10-20-13

Mixing of Lubricants. . . . . . . . . . . . . . . . . .10-20-13

Oil Filters . . . . . . . . . . . . . . . . . . . . . . . . . .10-20-13

Europe

Alternative Lubricants. . . . . . . . . . . . . . . . .10-20-14

Synthetic Lubricants. . . . . . . . . . . . . . . . . .10-20-14

Lubricant Storage. . . . . . . . . . . . . . . . . . . .10-20-14

Mixing of Lubricants. . . . . . . . . . . . . . . . . .10-20-14

Oil Filters . . . . . . . . . . . . . . . . . . . . . . . . . .10-20-14

Diesel Engine Coolant—North America. . .10-20-15

Diesel Engine Coolant—Europe . . . . . . . .10-20-16

Group 25—Serial Number Locations

Product Serial Number . . . . . . . . . . . . . . . . 10-25-1

Engine Serial Number. . . . . . . . . . . . . . . . . 10-25-1

Transaxle Serial Number . . . . . . . . . . . . . . 10-25-1

Mower Deck Serial Number . . . . . . . . . . . . 10-25-1

10-1

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Contents

TM1360 (16OCT91) 10-2 55, 56 Series Tractors

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HANDLE FLUIDS SAFELY—AVOID FIRES

Group 05

Safety

When you work around fuel, do not smoke or work near heaters or other fire hazards.

Store flammable fluids away from fire hazards. Do not incinerate or puncture pressurized containers.

Make sure machine is clean of trash, grease, and debris. Do not store oily rags; they can ignite and burn

spontaneously.

PREVENT BATTERY EXPLOSIONS

Keep sparks, lighted matches, and open flame away from the top of battery. Battery gas can explode.

10 05 1

TS227 -UN-23AUG88

DX,FLAME -19-04JUN90

Never check battery charge by placing a metal object across the posts. Use a volt-meter or hydrometer.

Do not charge a frozen battery; it may explode. Warm battery to 16˚C (60˚F).

PREPARE FOR EMERGENCIES

Be prepared if a fire starts. Keep a first aid kit and fire extinguisher handy. Keep emergency numbers for doctors, ambulance

service, hospital, and fire department near your telephone.

TS204 -UN-23AUG88

DX,SPARKS -19-04JUN90

TS291 -UN-23AUG88

DX,FIRE2 -19-04JUN90

TM1360 (16OCT91) 10-05-1 55, 56 Series Tractors

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PREVENT ACID BURNS

Sulfuric acid in battery electrolyte is poisonous. It is

strong enough to burn skin, eat holes in clothing, and

cause blindness if splashed into eyes. Avoid the hazard by:

1. Filling batteries in a well-ventilated area.

2. Wearing eye protection and rubber gloves.

3. Avoiding breathing fumes when electrolyte is added.

4. Avoiding spilling or dripping electrolyte.

5. Use proper jump start procedure. If you spill acid on yourself:

1. Flush your skin with water.

2. Apply baking soda or lime to help neutralize the acid.

3. Flush your eyes with water for 10—15 minutes. Get medical attention immediately.

If acid is swallowed:

1. Drink large amounts of water or milk.

2. Then drink milk of magnesia, beaten eggs, or vegetable oil.

3. Get medical attention immediately.

Safety

DX,POISON -19-04JUN90

TS203 -UN-23AUG88

TM1360 (16OCT91) 10-05-2 55, 56 Series Tractors

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AVOID HIGH-PRESSURE FLUIDS

Safety

Escaping fluid under pressure can penetrate the skin causing serious injury.

Avoid the hazard by relieving pressure before disconnecting hydraulic or other lines. Tighten all connections before applying pressure.

Search for leaks with a piece of cardboard. Protect hands and body from high pressure fluids.

If an accident occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removed within a few hours or gangrene may result. Doctors unfamiliar with this type of injury should reference a knowledgeable medical source. Such information is available from Deere & Company Medical Department in Moline, Illinois, U.S.A.

10 05 3

X9811 -UN-23AUG88

PARK MACHINE SAFELY

Before working on the machine:

• Lower all equipment to the ground.

• Stop the engine and remove the key.

• Disconnect the battery ground strap.

• Hang a “DO NOT OPERATE” tag in operator station.

DX,FLUID -19-09AUG91

TS230 -UN-24MAY89

DX,PARK -19-04JUN90

TM1360 (16OCT91) 10-05-3 55, 56 Series Tractors

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SUPPORT MACHINE PROPERLY

Always lower the attachment or implement to the ground

before you work on the machine. If you must work on a

lifted machine or attachment, securely support the machine or attachment.

Do not support the machine on cinder blocks, hollow tiles, or props that may crumble under continuous load. Do not work under a machine that is supported solely by a jack. Follow recommended procedures in this manual.

Safety

TS229 -UN-23AUG88

DX,LOWER -19-04JUN90

WEAR PROTECTIVE CLOTHING

Wear close fitting clothing and safety equipment appropriate to the job.

Prolonged exposure to loud noise can cause impairment or loss of hearing.

Wear a suitable hearing protective device such as earmuffs or earplugs to protect against objectionable or uncomfortable loud noises.

Operating equipment safely requires the full attention of the operator. Do not wear radio or music headphones while operating machine.

SERVICE MACHINES SAFELY

Tie long hair behind your head. Do not wear a necktie, scarf, loose clothing, or necklace when you work near machine tools or moving parts. If these items were to get caught, severe injury could result.

TS206 -UN-23AUG88

DX,WEAR -19-10SEP90

Remove rings and other jewelry to prevent electrical shorts and entanglement in moving parts.

DX,LOOSE -19-04JUN90

TM1360 (16OCT91) 10-05-4 55, 56 Series Tractors

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TS228 -UN-23AUG88

Page 11

WORK IN VENTILATED AREA

Safety

Engine exhaust fumes can cause sickness or death. If it is necessary to run an engine in an enclosed area, remove the exhaust fumes from the area with an exhaust pipe extension.

If you do not have an exhaust pipe extension, open the doors and get outside air into the area.

ILLUMINATE WORK AREA SAFELY

Illuminate your work area adequately but safely. Use a portable safety light for working inside or under the machine. Make sure the bulb is enclosed by a wire cage. The hot filament of an accidentally broken bulb can ignite spilled fuel or oil.

10 05 5

TS220 -UN-23AUG88

DX,AIR -19-04JUN90

TS223 -UN-23AUG88

DX,LIGHT -19-04JUN90

REPLACE SAFETY SIGNS

Replace missing or damaged safety signs. See the machine operator’s manual for correct safety sign placement.

USE PROPER LIFTING EQUIPMENT

Lifting heavy components incorrectly can cause severe injury or machine damage.

Follow recommended procedure for removal and installation of components in the manual.

TS201 -UN-23AUG88

DX,SIGNS1 -19-04JUN90

DX,LIFT -19-04JUN90

TM1360 (16OCT91) 10-05-5 55, 56 Series Tractors

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TS226 -UN-23AUG88

Page 12

KEEP ROPS INSTALLED PROPERLY

Make certain all parts are reinstalled correctly if the

roll-over protective structure (ROPS) is loosened or

removed for any reason. Tighten mounting bolts to proper torque.

The protection offered by ROPS will be impaired if ROPS is subjected to structural damage, is involved in an overturn incident, or is in any way altered by welding, bending, drilling, or cutting. A damaged ROPS should be replaced, not reused.

Safety

TS212 -UN-23AUG88

DX,ROPS3 -19-04JUN90

SERVICE TIRES SAFELY

Explosive separation of a tire and rim parts can cause serious injury or death.

Do not attempt to mount a tire unless you have the proper equipment and experience to perform the job.

Always maintain the correct tire pressure. Do not inflate the tires above the recommended pressure. Never weld or heat a wheel and tire assembly. The heat can cause an increase in air pressure resulting in a tire explosion. Welding can structurally weaken or deform the wheel.

When inflating tires, use a clip-on chuck and extension hose long enough to allow you to stand to one side and NOT in front of or over the tire assembly. Use a safety cage if available.

Check wheels for low pressure, cuts, bubbles, damaged rims or missing lug bolts and nuts.

DX,RIM -19-24AUG90

TM1360 (16OCT91) 10-05-6 55, 56 Series Tractors

010395

TS211 -UN-23AUG88

Page 13

AVOID HARMFUL ASBESTOS DUST

Safety

Avoid breathing dust that may be generated when handling components containing asbestos fibers. Inhaled asbestos fibers may cause lung cancer.

Components in products that may contain asbestos fibers are brake pads, brake band and lining assemblies, clutch plates, and some gaskets. The asbestos used in these components is usually found in a resin or sealed in some way. Normal handling is not hazardous as long as airborne dust containing asbestos is not generated.

Avoid creating dust. Never use compressed air for cleaning. Avoid brushing or grinding material containing asbestos. When servicing, wear an approved respirator. A special vacuum cleaner is recommended to clean asbestos. If not available, apply a mist of oil or water on the material containing asbestos.

Keep bystanders away from the area.

10 05 7

TS220 -UN-23AUG88

WORK IN CLEAN AREA

Before starting a job:

• Clean work area and machine.

• Make sure you have all necessary tools to do your job.

• Have the right parts on hand.

• Read all instructions thoroughly; do not attempt shortcuts.

DX,DUST -19-15MAR91

T6642EJ -UN-18OCT88

DX,CLEAN -19-04JUN90

TM1360 (16OCT91) 10-05-7 55, 56 Series Tractors

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Page 14

USE PROPER TOOLS

Use tools appropriate to the work. Makeshift tools and

procedures can create safety hazards.

Use power tools only to loosen threaded parts and fasteners.

For loosening and tightening hardware, use the correct size tools. DO NOT use U.S. measurement tools on metric fasteners. Avoid bodily injury caused by slipping wrenches.

Use only service parts meeting John Deere specifications.

Safety

TS779 -UN-08NOV89

DX,REPAIR -19-04JUN90

DISPOSE OF WASTE PROPERLY

Improperly disposing of waste can threaten the environment and ecology. Potentially harmful waste used with John Deere equipment include such items as oil, fuel, coolant, brake fluid, filters, and batteries.

Use leakproof containers when draining fluids. Do not use food or beverage containers that may mislead someone into drinking from them.

Do not pour waste onto the ground, down a drain, or into any water source.

Air conditioning refrigerants escaping into the air can damage the Earth’s atmosphere. Government regulations may require a certified air conditioning service center to recover and recycle used air conditioning refrigerants.

Inquire on the proper way to recycle or dispose of waste from your local environmental or recycling center, or from your John Deere dealer.

TS1133 -UN-26NOV90

DX,DRAIN -19-09AUG91

TM1360 (16OCT91) 10-05-8 55, 56 Series Tractors

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Page 15

LIVE WITH SAFETY

Safety

Before returning machine to customer, make sure machine is functioning properly, especially the safety systems. Install all guards and shields.

10 05 9

TS231 -19-07OCT88

DX,LIVE -19-04JUN90

TM1360 (16OCT91) 10-05-9 55, 56 Series Tractors

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10 05 10

Safety

TM1360 (16OCT91) 10-05-10 55, 56 Series Tractors

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Page 17

Group 10

Repair Specifications

GENERAL TRACTOR SPECIFICATIONS

ITEM 655 755/756 855/856 955

ENGINE:

Engine Model . . . . . . . . . . . . 3TN66UJ 3TNA72UJ 3TN75RJ 3TN84RJ

Engine Horsepower, Net. . . 16 (11.9 kW) 20 (14.9 kW) 24 (17.9 kW) 33 (24.6 kW)

PTO Horsepower . . . . . . . 10.6 (8.1 kW) 15 (11.2 kW) 19 (14.2 kW) 27 (20.1 kW)

Rated Engine Speed. . . . . . . 3200 rpm 3200 rpm 3200 rpm 3200 rpm

Type . . . . . . . . . . . . . . . . . . . . Diesel Diesel Diesel Diesel

Operating Range . . . . . . .1400-3425 rpm 1400-3425 rpm 1400-3425 rpm 1400-3425 rpm

Number of Cylinders. . . . . . . . . . 3 3 3 3

Displacement . . . . . . . . . . . 40.2 cu. in. 53.6 cu. in. 60.7 cu. in. 87.3 cu. in.

658 cm³ 879 cm³ 995 cm³ 1430 cm³

Bore and Stroke . . . . . . . . .2.59x2.53 in. 2.83x2.83 in. 2.95x2.95 in. 3.31x3.39 in.

(66x64.2 mm) (72x72 mm) (75x75 mm) (84x86 mm)

Compression Ratio. . . . . . . . . 22.4:1 22.3:1 17.8:1 18.0:1

Lubrication . . . . . . . . . . . . . .Pressured Pressured Pressured Pressured

Cooling System. . . . . . . . . . Water-pump Water-pump Water-pump Water-pump

Air Cleaner . . . . . . . . . . . . Dry-Type with Dry-Type with Dry-Type with Dry-Type with

Safety Element Safety Element Safety Element Safety Element

Engine Shutoff . . . . . . . . . . . . . Key Key Key Key

Engine Torque at

Rated Speed. . . . . . . . . . . . . 35 N•m 45 N•m 58 N•m 73 N•m

(26 lb-ft) (33 lb-ft) (39 lb-ft) (54 lb-ft)

10 10

ELECTRICAL SYSTEM:

Type . . . . . . . . . . . . . . . . . . . . 12 volt 12 volt 12 volt 12 volt

Battery Size . . . . . . . . . 491 Cold Cranking 491 Cold Cranking 475 Cold Cranking 475 Cold Cranking

Amps @ -18° C Amps @ -18° C Amps @ -18° C Amps @ -18° C

Alternator . . . . . . . . . . . . . . . .35 Amp 35 Amp 35 Amp N/A

40 Amp 40 Amp 40 Amp 40 Amp

Starter Size. . . . . . . . . . . .1.3 hp (1.0 kW) 1.3 hp (1.0 kW) 1.3 hp (1.0 kW) 1.9 hp (1.4 kW)

FUEL SYSTEM:

Type . . . . . . . . . . . . . . . . Indirect Injection Indirect Injection Direct Injection Direct Injection

Injection Pump Type . . . . . . .In-line with In-line with In-line with In-line with

Electric Shutoff Electric Shutoff Electric Shutoff Electric Shutoff

Gallon/hr at 75% load

(mowing). . . . . . . . . . . . . .Not Available 0.86 0.79 1.4

DRIVE TRAIN:

Transmission Type . . . . Hydrostatic-2-range Hydrostatic-2-range Hydrostatic-2-range Hydrostatic-2-range

Transaxle Speed

Ranges . . . . . . . . . . . . . . . . .High/Lo High/Lo High/Lo High/Lo

Number of Speeds . . . . . . . . . Infinite Infinite Infinite Infinite

Final Drive. . . . . . . . . . . . . . . Planetary Planetary Planetary Planetary

Brakes. . . . . . . . . . . . . . . . . . Wet Disk Wet Disk Wet Disk Wet Disk

Steering . . . . . . . . . . . . . . . . . Power Power Power Power

Drawbar Tonque Weight

Capacity . . . . . . . . . . . . .675 lb. (306 kg) 675 lb. (306 kg) 675 lb. (306 kg) 800 lb. (363 kg)

10-10-1

Page 18

Repair Specifications/General Specifications

GENERAL SPECIFICATIONS—CONTINUED

ITEM 655 755/756 855/856 955

HYDRAULIC SYSTEM:

Type of System . . . . . . . . . Open Center Open Center Open Center Open Center

Working Pressure . . . . . . . . . 2050 psi 2050 psi 2050 psi 2500 psi

(14135 kPa) (14135 kPa) (14135 kPa) (17240 kPa)

Pump Type . . . . . . . . . . . . Gerotor Gear Gerotor Gear Gerotor Gear Gerotor Gear

Pump Capacity . . . . . . . . . . . . 4 gpm 5.6 gpm 5.6 gpm 7.2 gpm

(0.25 L/s) (0.35 L/s) (0.35 L/s) (0.45 L/s)

3-PT. Hitch Type . . . . . . .Cat. 1 (Standard) Cat. 1 (Standard) Cat. 1 Cat. 1

Hitch Lift Capacity

(24 in. behind link arms)

Early Models . . . . . . . . . . . . 785 lbs. 785 lbs. 785 lbs. 957 lbs.

(357 kg) (357 kg) (357 kg) (434 kg)

Late Models or Retrofit . . . . . . N/A SN 180250— SN 180450— SN 180525—

N/A 1005 lbs. 1005 lbs. 1177 lbs.

(456 kg) (456 kg) (534 kg)

Lift Control Type . . . . . . . . . Position Position Position Position

PTO:

Type. . . . . . . . . . . . . . . . .Live Independent Live Independent Live Independent Live Independent

Speed (PTO rpm at 3200

engine rpm—full load):

Mid (1:1 gear ratio) . . . . . . . 2100 rpm 2100 rpm 2100 rpm 2100 rpm

Rear (1:3 gear ratio) . . . . . . 540 rpm 540 rpm 540 rpm 540 rpm

Clutch . . . . . . . . . . . . . . . . . . Hydraulic Hydraulic Hydraulic Hydraulic

Multi-Disk Multi-Disk Multi-Disk Multi-Disk

Brake. . . . . . . . . . . . . . . . . .Hydraulically Hydraulically Hydraulically Hydraulically

Controlled Controlled Controlled Controlled

MOWER BLADE TIP SPEED

(at 3200 engine rpm full load):

50 Inch Mower. . . . . . . . . . 15,371 ft/min N/A N/A N/A

(4688 m/min)

1:1.04 Gear Ratio . . . . .Spindle rpm 3389 N/A N/A N/A

60 Inch Mower. . . . . . . . . . . . . . N/A 15,471 ft/min 15,471 ft/min 15,471 ft/min

(4719 m/min) (4719 m/min) (4719 m/min)

1:1 Gear Ratio. . . . . . . . . . . . . N/A Spindle rpm 2883 Spindle rpm 2883 Spindle rpm 2883

72 Inch Mower. . . . . . . . . . . . . . N/A 15,167 ft/min 15,167 ft/min 15,167 ft/min

(4626 m/min) (4626 m/min) (4626 m/min)

1:1 Gear Ratio. . . . . . . . . . . . . N/A Spindle rpm 2321 Spindle rpm 2321 Spindle rpm 2321

261 Inch Mower. . . . . . . . . . . . . N/A 14,465 ft/min 14,465 ft/min 14,465 ft/min

(4412 m/min) (4412 m/min) (4412 m/min)

1:3 Gear Ratio. . . . . . . . . . . . . N/A Spindle rpm 2695 Spindle rpm 2695 Spindle rpm 2695

272 Inch Mower. . . . . . . . . . . . . N/A 14,601 ft/min 14,601 ft/min 14,601ft/min

(4453 m/min) (4453 m/min) (4453 m/min)

1:3 Gear Ratio. . . . . . . . . . . . . N/A Spindle rpm 2234 Spindle rpm 2234 Spindle rpm 2234

10-10-2

Page 19

Repair Specifications/General Specifications

GENERAL SPECIFICATIONS—CONTINUED

ITEM 655 755/756 855/856 955

FLUID CAPACITIES:

Fuel Tank . . . . . . . . . . . 3.95 U.S. gal (15 L) 4.4 U.S. gal (16.7 L) 6.6 U.S. gal (25 L) 6.6 U.S. gal (25 L)

Cooling System. . . . . . . . 4 U.S. qt. (3.8 L) 4 U.S. qt. (3.8 L) 4.8 U.S. qt. (4.5 L) 4.8 U.S. qt. (4.5 L)

Crankcase (w/filter). . . . .2.5 U.S. qt. (2.4 L) 2.86 U.S. qt. (2.7 L) 4.1 U.S. qt. (3.9 L) 4.4 U.S. qt. (4.2 L)

Transmission and

Hydraulic System . . . . 4.5 U.S. gal. (17 L) 4.5 U.S. gal. (17 L) 4.5 U.S. gal. (17 L) 4.5 U.S. gal. (17 L)

MFWD Gear Case . . . .2.25 U.S. qt. (2.13 L) 2.25 U.S. qt. (2.13 L) 2.25 U.S. qt. (2.13 L) 3.5 U.S. qt. (3.3 L)

WEIGHT (includes fuel, oil, coolant and R-1 tires):

2WD . . . . . . . . . . . . . . . . . . . 1584 lbs. 1700 lbs. 1790 lbs. N/A

(718 kg) (771 kg) (812 kg)

MFWD. . . . . . . . . . . . . . . . . . 1680 lbs. 1835 lbs. 1870 lbs. 1990 lbs.

(762 kg) (832 kg) (848 kg) (903 kg)

SERVICE INTERVALS: Engine

Valve Adjustment . . . . . . . . .300 Hours 300 Hours 300 Hours 300 Hours

Primary Filter . . . . . . . . . . . .400 Hours 400 Hours 400 Hours 400 Hours

or every two years

10 10

Secondary Filter . . . . . . . Every two years Every two years Every two years Every two years

or when every third primary filter is installed

GROUND SPEEDS (at full engine rpm):

Forward High Range. . . . . .0—10.0 mph 0—10.6 mph 0—11.0 mph 0—11.4 mph

(0—16.1 K/hr) (0—17.1 K/hr) (0—17.7 K/hr) (0—18.3 K/hr)

Forward Lo Range . . . . . . .0—05.4 mph 0—05.8 mph 0—06.0 mph 0—05.1 mph

(0—08.7 K/hr) (0—09.3 K/hr) (0—09.7 K/hr) (0—08.2 K/hr)

Reverse High And Lo . . . . .0—05.0 mph 0—05.3 mph 0—05.5 mph 0—05.7 mph

(0—08.1 K/hr) (0—08.5 K/hr) (0—08.9 K/hr) (0—09.2 K/hr)

ENGINE COOLANT HEATER:

Current Draw Current Draw Current Draw Current Draw

400 Watts 400 Watts 400 Watts 400 Watts

SPARK ARRESTER:

Not Available Available Available Available

10-10-3

Page 20

10 10

Repair Specifications/General Specifications

TM1360 (16OCT91) 10-10-4 55, 56 Series Tractors

010395

Page 21

Group 15

Repair Information

METRIC FASTENER TORQUE VALUES

12.9

Dry

4.8

8.8

9.8

10.9

Property Class and Head Markings

Property

4.8

8.8

9.8

10.9

Class and Nut Markings

Class 4.8 Class 8.8 or 9.8 Class 10.9 Class 12.9

Lubricated SIZE N•m lb-ft N•m lb-ft N•m lb-ft N•m lb-ft N•m lb-ft N•m lb-ft N•m lb-ft N•m lb-ft M6 M8

48 3.5 6 4.5 9 6.5 11 8.5 13 9.5 17 12 15 11.5 19 14.5

12 8.5 15 11 22 16 28 20 32 24 40 30 37 28 47 35

510

Dry

Lubricated

Dry

Lubricated

Dry

Lubricated

10 15 1

TS1163

M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36

23 17 29 21 43 32 55 40 63 47 80 60 75 55 95 70

40 29 50 37 75 55 95 70 110 80 140 105 130 95 165 120

63 47 80 60 120 88 150 110 175 130 225 165 205 150 260 109

100 73 125 92 190 140 240 175 275 200 350 225 320 240 400 300

135 100 175 125 260 195 330 250 375 275 475 350 440 325 560 410

190 140 240 180 375 275 475 350 530 400 675 500 625 460 800 580

260 190 330 250 510 375 650 475 725 540 925 675 850 625 1075 800

330 250 425 310 650 475 825 600 925 675 1150 850 1075 800 1350 1000

490 360 625 450 950 700 1200 875 1350 1000 1700 1250 1600 1150 2000 1500

675 490 850 625 1300 950 1650 1200 1850 1350 2300 1700 2150 1600 2700 2000

900 675 1150 850 1750 1300 2200 1650 2500 1850 3150 2350 2900 2150 3700 2750

1150 850 1450 1075 2250 1650 2850 2100 3200 2350 4050 3000 3750 2750 4750 3500

DO NOT use these hand torque values if a different torque value or tightening procedure is given for a specific application. Torque values listed are for general use only and include a ±10% variance factor. Check tightness of fasteners periodically. DO NOT use air powered wrenches.

Shear bolts are designed to fail under predetermined loads. Always replace shear bolts with identical grade.

Fasteners should be replaced with the same grade. Make sure fastener threads are clean and that you properly start thread engagement. This will prevent them from failing when tightening.

When bolt and nut combination fasteners are used, torque values should be applied to the NUT instead of the bolt head.

Tighten toothed or serrated-type lock nuts to the full torque value.

“Lubricated” means coated with a lubricant such as engine oil, or fasteners with phosphate and oil coatings. “Dry” means plain or zinc plated (yellow dichromate - Specification JDS117) without any lubrication

Reference: JDS—G200.

10-15-1

Page 22

Repair Information/Metric Cap Screw Torque Values

INCH FASTENER TORQUE VALUES

SAE Grade and Head Markings

No Marks

1 or 2

5.1

5.2

8.2

8 SAE Grade and Nut

No Marks

Markings

TS1 162

Grade 1 Grade 2

Lubricated SIZE N•m lb-ft N•m lb-ft N•m lb-ft N•m lb-ft N•m lb-ft N•m lb-ft N•m lb-ft N•m lb-ft 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4

3.7 2.8 4.7 3.5 6 4.5 7.5 5.5 9.5 712913.5 10 17 12.5

7.7 5.5 10 7 12 9151120 15 25 18 28 21 35 26

14 10 17 13 22 16 27 20 35 26 44 33 50 36 63 46

22 16 28 20 35 26 44 32 55 41 70 52 80 58 100 75

33 25 42 31 53 39 67 50 85 63 110 80 120 90 150 115

48 36 60 45 75 56 95 70 125 90 155 115 175 130 225 160

67 50 85 62 105 78 135 100 170 125 215 160 215 160 300 225

120 87 150 110 190 140 240 175 300 225 375 280 425 310 550 400

Dry

Lubricated

Grade 5, 5.1 or 5.2 Grade 8 or 8.2

Dry

Lubricated

Dry

Lubricated

Dry

7/8 1 1-1/8 1-1/4 1-3/8 1-1/2

190 140 240 175 190 140 240 175 490 360 625 450 700 500 875 650

290 210 360 270 290 210 360 270 725 540 925 675 1050 750 1300 975

470 300 510 375 470 300 510 375 900 675 1150 850 1450 1075 1850 1350

570 425 725 530 570 425 725 530 1300 950 1650 1200 2050 1500 2600 1950

750 550 950 700 750 550 950 700 1700 1250 2150 1550 2700 2000 3400 2550

1000 725 1250 925 990 725 1250 930 2250 1650 2850 2100 3600 2650 4550 3350

Shear bolts are designed to fail under predetermined loads. Always replace shear bolts with identical grade.

Fasteners should be replaced with the same grade. Make sure fastener threads are clean and that you properly start thread engagement. This will prevent them from failing when tightening.

When bolt and nut combination fasteners are used, torque values should be applied to the NUT instead of the bolt head.

Tighten toothed or serrated-type lock nuts to the full torque value.

“Lubricated” means coated with a lubricant such as engine oil, or fasteners with phosphate and oil coatings. “Dry” means plain or zinc plated (yellow dichro-

mate - Specification JDS117) without any lubrication

“Grade 2” applies for hex cap screws (not hex bolts) up to 152 mm (6-in.) long. “Grade 1” applies for hex cap screws over 152 mm (6-in.) long, and for all other types of bolts and screws of any length.

Reference: JDS—G200.

10-15-2

Page 23

Service Recommendations/O-Ring Face Seal Fittings

SERVICE RECOMMENDATIONS O-RING FACE SEAL FITTINGS

O-RING FACE SEAL FITTING INCH TORQUE

10 15

1. Inspect the fitting sealing surfaces (A). They must be

free of dirt or defects.

2. Inspect the O-ring (B). It must be free of damage or

defects.

3. Lubricate O-rings and install into groove using

petroleum jelly to hold in place.

4. Push O-ring into the groove with plenty of petroleum

jelly so O-ring is not displaced during assembly.

5. Index angle fittings and tighten by hand pressing joint

together to insure O-ring remains in place.

6. Tighten fitting or nut to torque value shown on the

chart per dash size stamped on the fitting. Do not allow hoses to twist when tightening fittings.

NOMINAL

Tube O.D. Size Torque Nut Torque

Dash

Size

THREAD SWIVEL NUT BULKHEAD

mm in. in. N•m lb-ft N•m lb-ft

6.35 0.250 -4 9/16-18 16 12 5.0 3.5

9.52 0.375 -6 11/16-16 24 18 9.0 6.5

12.70 0.500 -8 13/16-16 50 37 17.0 12.5

15.88 0.625 -10 1-14 69 51 17.0 12.5

19.05 0.750 -12 1 3/16-12 102 75 17.0 12.5

22.22 0.875 -14 1 3/16-12 102 75 17.0 12.5

25.40 1.000 -16 1 7/16-12 142 105 17.0 12.5

31.75 1.250 -20 1 11/16-12 190 140 17.0 12.5

38.10 1.500 -24 2-12 217 160 17.0 12.5

NOTE: Torque tolerance is + 15 -20%.

10-15-3

Page 24

Service Recommendations/O-Ring Boss Fittings

O-RING BOSS FITTINGS

1. Inspect boss O-ring boss seat. It must be free of dirt and defects. If repeated leaks occur, inspect for defects with a magnifying glass. Some raised defects can be removed with a slip stone.

STRAIGHT FITTING OR SPECIAL NUT TORQUE

Thread Torque

Number

Size N•m lb-ft of Flats

3/8-24 UNF 8 (6) 2 7/16-20 UNF 12 (9) 2 1/2-20 UNF 16 (12) 2 9/16-18 UNF 24 (18) 2 3/4-16 UNF 46 (34) 2 7/8-14 UNF 62 (46) 1-1/2

2. Put hydraulic oil or petroleum jelly on the O-ring (B). Place electrical tape over the threads to protect Oring from nicks. Slide O-ring over the tape and into the groove (A) of fitting. Remove tape.

3. For angle fittings (C), loosen special nut (E) and push special washer (D) against threads so O-ring can be installed into the groove of fitting.

4. Turn fitting into the boss by hand until special washer or washer face (straight fitting) contacts boss face and O-ring is squeezed into its seat.

5. To position angle fittings, turn the fitting counterclockwise a maximum of one turn.

6. Tighten straight fittings to torque value shown on chart. For angle fittings, tighten the special nut to value shown in the chart while holding body of fitting with a wrench.

1-1/16-12 UN 102 (75) 1 1-3/16-12 UN 122 (90) 1 1-5/16-12 UN 142 (105) 3/4 1-5/8-12 UN 190 (140) 3/4 1-7/8-12 UN 217 (160) 1/2

a. Torque tolerance is ± 10 percent. b. To be used if a torque wrench cannot be used. After tightening fitting by hand, put a mark on nut or boss; then tighten special nut or straight fitting the number of flats shown.

10-15-4

Page 25

Group 20

Fuels, Lubricants, and Coolants

DIESEL FUEL - NORTH AMERICA

In general, diesel fuels are blended to satisfy the low air temperature requirements of the geographical area in which they are sold.

In North America, diesel fuel is usually specified to ASTM D975 and sold as either Grade 1 for cold air temperatures or Grade 2 for warm air temperatures.

If diesel fuels being supplied in your area DO NOT meet any of the above specifications, use diesel fuels with the following equivalent properties:

•Cetane Number 40 (minimum) A cetane number greater than 50 is preferred,

especially for air temperatures below –20°C (–4°F) or elevations above 1500 m (5000 ft).

•Cold Filter Plugging Point (CFPP) The air temperature at which diesel fuel begins to

cloud or jell — at least 5°C (9°F) below the expected low air temperature range.

•Sulfur Content of 0.05% Diesel fuels for highway use in the United States now

require sulfur content to be less than 0.05%. If diesel fuel being used has a sulfur content greater

than 0.05%, reduce the service interval for engine oil and filter by 50%.

Consult your local diesel fuel distributor for properties of the diesel fuel available in your area.

California Proposition 65 Warning: Diesel engine exhaust and some of its elements from this product are known to the State of California to cause cancer, birth defects, or other reproductive harm.

WARNING

DIESEL FUEL LUBRICITY

Diesel fuel must have adequate lubricity to ensure proper operation and durability of fuel injection system components. Fuel lubricity should pass a minimum of 3300 gram load level as measured by the BOCLE scuffing test.

DIESEL FUEL STORAGE

IMPORTANT: DO NOT USE GALVANIZED

CONTAINERS—diesel fuel stored in galvanized containers reacts with zinc coating in the container to form zinc flakes. If fuel contains water, a zinc gel will also form. The gel and flakes will quickly plug fuel filters and damage fuel injectors and fuel pumps.

It is recommended that diesel fuel be stored ONLY in a clean, approved POLYETHYLENE PLASTIC container WITHOUT any metal screen or filter. This will help prevent any accidental sparks from occurring. Store fuel in an area that is well ventilated to prevent possible igniting of fumes by an open flame or spark, this includes any appliance with a pilot light.

IMPORTANT: Keep all dirt, scale, water or other

foreign material out of fuel.

Keep fuel in a safe, protected area and in a clean, properly marked (“DIESEL FUEL”) container. DO NOT use deicers to attempt to remove water from fuel. DO NOT depend on fuel filters to remove water from fuel. It is recommended that a water separator be installed in the storage tank outlet. BE SURE to properly discard unstable or contaminated diesel fuel and/or their containers when necessary.

10-20-1

Page 26

Fuels, Lubricants, and Coolants/Hydraulic/Transmission Oil

DIESEL FUEL - EUROPE

In general, diesel fuels are blended to satisfy the low air temperature requirements of the geographical area in which they are sold.

In Europe, diesel fuel is usually specified to EN590 and sold in 5 different classes or 6 different grades.

If diesel fuels being supplied in your area DO NOT meet any of the above specifications, use diesel fuels with the following equivalent properties:

•Cetane Number 40 (minimum) A cetane number greater than 50 is preferred,

especially for air temperatures below –20°C (–4°F) or elevations above 1500 m (5000 ft).

If diesel fuel being used has a sulfur content greater than 0.05%, reduce the service interval for engine oil and filter by 50%.

Consult your local diesel fuel distributor for properties of the diesel fuel available in your area.

•Cold Filter Plugging Point (CFPP) The air temperature at which diesel fuel begins to

cloud or jell — at least 5°C (9°F) below the expected low air temperature range.

•Sulfur Content of 0.05% Diesel fuel for highway use in the European Union

will be required to have a sulfur content of less than

0.05% by 1 October 1996. If diesel fuel being used has a sulfur content greater

than 0.05%, reduce the service interval for engine oil and filter by 50%.

Consult your local diesel fuel distributor for properties of the diesel fuel available in your area.

DIESEL FUEL LUBRICITY

DIESEL FUEL STORAGE

IMPORTANT: DO NOT USE GALVANIZED

in an area that is well ventilated to prevent possible igniting of fumes by an open flame or spark, this includes any appliance with a pilot light.

IMPORTANT: Keep all dirt, scale, water or other

foreign material out of fuel.

10-20-2

Page 27

Fuels, Lubricants, and Coolants/Hydraulic/Transmission Oil

4–CYCLE DIESEL ENGINE OIL - NORTH AMERICA

Use appropriate oil viscosity based on the expected air temperature range during the period between recommended oil changes. Operating outside of these recommended oil air temperature ranges may cause premature engine failure.

The following John Deere oils are PREFERRED:

•PLUS–50®—SAE 15W-40;

•TORQ–GARD SUPREME®—SAE 5W-30. The following John Deere oils are also recommended,

based on their specified temperature range:

•TURF–GARD®—SAE 10W-30;

•PLUS–4®—SAE 10W-30;

•TORQ–GARD SUPREME®—SAE 30. Other oils may be used if above John Deere oils are not

available, provided they meet one of the following specifications:

•SAE 15W-40 (preferred)—API Service Classifications CG–4 or CF–4 or higher;

•SAE 5W-30 (preferred)—API Service Classification CD or CC or higher;

•SAE 10W-30—API Service Classification CF–4 or CF or higher;

•SAE 30—API Service Classification CF–4 or CF or higher.

IMPORTANT: If diesel fuel with sulfur content

greater than 0.5% is used, reduce the service interval for oil and filter by 50%.

SAE 30

SAE 15W-40

SAE10W-30

SAE 5W-30

PREFERRED

AIR TEMPERATURE

M58275

John Deere Dealers: You may want to cross-reference the following publications to recommend the proper oil for your customers:

•Module DX, ENOIL in JDS–G135;

•Section 530, Lubricants & Hydraulics, of the John Deere Merchandise Sales Guide;

•Lubrication Sales Manual PI7032.

10 20 3

10-20-3

Page 28

Fuels, Lubricants, and Coolants/Hydraulic/Transmission Oil

4–CYCLE DIESEL ENGINE OIL - EUROPE

The following John Deere oils are PREFERRED:

•TORQ–GARD SUPREME®—SAE 15W-40;

•UNI–GARD™—SAE 15W-40;

•TORQ–GARD SUPREME®—SAE 5W-30;

•UNI–GARD™—SAE 5W-30. The following John Deere oils are also recommended,

based on their specified temperature range:

•TORQ–GARD SUPREME®—SAE 10W-30;

•UNI–GARD™—SAE 10W-30;

•TORQ–GARD SUPREME®—SAE 30;

•UNI–GARD™—SAE 30. Other oils may be used if above John Deere oils are not

available, provided they meet one of the following specifications:

•CCMC Specification D5 or Mercedes Benz MB228.3 or higher;

•CCMC Specification D4 or Mercedes Benz MB228.1 or higher .

IMPORTANT: If diesel fuel with sulfur content

greater than 0.5% is used, reduce the service interval for oil and filter by 50%.

SAE 30

SAE 15W-40

SAE10W-30

SAE 5W-30

PREFERRED

AIR TEMPERATURE

M58275

John Deere Dealers: You may want to cross-reference the following publications to recommend the proper oil for your customers:

•Module DX,ENOIL in JDS–G135;

•Section 530, Lubricants & Hydraulics, of the John Deere Merchandise Sales Guide.

10-20-4

Page 29

Fuels, Lubricants, and Coolants/Hydraulic/Transmission Oil

BREAK–IN DIESEL ENGINE OIL NORTH AMERICA

IMPORT ANT: ONLY use this specified break-in oil in

rebuilt or remanufactured engines for the first 100 hours maximum. DO NOT use PLUS–50®, SAE 15W40 oil or oils meeting specifications API CG–4 or API CF–4, these oils will not allow rebuilt or remanufactured engines to break-in properly.

The following John Deere oil is PREFERRED:

•BREAK–IN ENGINE OIL. John Deere BREAK–IN ENGINE OIL is formulated

with special additives for aluminum and cast iron type engines to allow the power cylinder components (pistons, rings, and liners as well) to “wear-in” while protecting other engine components, valve train and gears, from abnormal wear. Engine rebuild instructions should be followed closely to determine if special requirements are necessary.

John Deere BREAK–IN ENGINE OIL is also recommended for non-John Deere engines, both aluminum and cast iron types.

If this preferred John Deere oil is not available, use a break-in engine oil meeting the following specification during the first 100 hours of operation:

•API Service Classification CE. After the break-in period, use the John Deere oil that is

recommended for this engine.

BREAK-IN OIL

AIR TEMPERATURE

M58275

John Deere Dealers: You may want to cross-reference the following publications to recommend the proper oil for your customers:

•Module DX,ENOIL4 in JDS–G135;

•Section 530, Lubricants & Hydraulics, of the John Deere Merchandise Sales Guide;

•Lubrication Sales Manual PI7032.

10 20

10-20-5

Page 30

Fuels, Lubricants, and Coolants/Hydraulic/Transmission Oil

BREAK–IN DIESEL ENGINE OIL - EUROPE

IMPORT ANT: ONLY use this specified break-in oil in

rebuilt or remanufactured engines for the first 100 hours maximum. DO NOT use SAE 15W-40 oil or oils meeting CCMC Specification D5—these oils will not allow rebuilt or remanufactured engines to break-in properly.

The following John Deere oil is PREFERRED:

•BREAK–IN ENGINE OIL. John Deere BREAK–IN ENGINE OIL is formulated

John Deere BREAK–IN ENGINE OIL is also recommended for non-John Deere engines, both aluminum and cast iron types.

If above preferred John Deere oil is not available, use a break-in engine oil meeting the following specification during the first 100 hours of operation:

•CCMC Specification D4. After the break-in period, use the John Deere oil that is

recommended for this engine.

BREAK-IN OIL

AIR TEMPERATURE

M58275

John Deere Dealers: You may want to cross-reference the following publications to recommend the proper oil for your customers:

•Module DX, ENOIL4 in JDS–G135;

•Section 530, Lubricants & Hydraulics, of the John Deere Merchandise Sales Guide.

10-20-6

Page 31

Fuels, Lubricants, and Coolants/Hydraulic/Transmission Oil

HYDROSTATIC TRANSMISSION AND HYDRAULIC OIL - NORTH AMERICA

Use the appropriate oil viscosity based on these air temperature ranges. Operating outside of these recommended oil air temperature ranges may cause premature transmission or hydraulic system failures.

IMPORTANT: Mixing of LOW VISCOSITY HY–

GARD® and HY–GARD® oils is permitted. DO NOT mix any other oils in this transmission. DO NOT use engine oil or “Type F” (Red) Automatic Transmission Fluid in this transmission. DO NOT use BIO–HY– GARD® in this transmission.

The following John Deere transmission and hydraulic oil is PREFERRED:

•LOW VISCOSITY HY–GARD®—JDM J20D. The following John Deere oil is also recommended if

above preferred oil is not available:

•HY–GARD®—JDM J20C. Other oils may be used if above recommended John

Deere oils are not available, provided they meet one of the following specifications:

•John Deere Standard JDM J20D (preferred);

•John Deere Standard JDM J20C.

IMPORTANT: When using HY–GARD® (JDM J20C),

if the minimum air temperature should fall below -7°C (-20°F) drain reservoir and switch to LOW VISCOSITY HY–GARD® (JDM J20D). If minimum air temperature should fall below -40°C (-40°F), the transmission oil must be heated to at least five degrees above the lower limit before start-up or transmission may be damaged. For prolonged operation under heavy load in air temperatures above 50°C (122°F) reduce service interval by 50%.

JDM J20C

JDM J20D

PREFERRED

AIR TEMPERATURE

M58275

John Deere Dealers: You may want to cross-reference the following publications to recommend the proper oil for your customers:

•Module DX,ANTI in JDS–G135;

•Section 530, Lubricants & Hydraulics, of the John Deere Merchandise Sales Guide;

•Lubrication Sales Manual PI7032.

NOTE: Disregard the John Deere All Weather

Hydrostatic Fluid (JDM J21A) listing—it has been eliminated from the specifications.

10 20

10-20-7

Page 32

Fuels, Lubricants, and Coolants/Hydraulic/Transmission Oil

HYDROSTATIC TRANSMISSION AND

HYDRAULIC OIL - EUROPE

IMPORTANT: Mixing of LOW VISCOSITY HY–

The following John Deere transmission and hydraulic oil is PREFERRED:

•LOW VISCOSITY HY–GARD®—JDM J20D. The following John Deere oil is also recommended if

above preferred oil is not available:

•HY–GARD®—JDM J20C.

JDM J20D

PREFERRED

AIR TEMPERATURE

JDM J20C

M58275

Other oils may be used if above recommended John Deere oils are not available, provided they meet one of the following specifications:

•John Deere Standard JDM J20D (preferred);

•John Deere Standard JDM J20C.

IMPORTANT: When using HY–GARD® (JDM J20C),

John Deere Dealers: You may want to cross-reference

the following publications to recommend the proper oil for your customers:

•Module DX, ANTI in JDS–G135;

•Section 530, Lubricants & Hydraulics, of the John Deere Merchandise Sales Guide.

NOTE: Disregard the John Deere All Weather

Hydrostatic Fluid (JDM J21A) listing—it has been eliminated from the specifications.

10-20-8

Page 33

Fuels, Lubricants, and Coolants/Hydraulic/Transmission Oil

GEAR CASE OIL - NORTH AMERICA MECHANICAL FRONT WHEEL DRIVE

Use the following oil viscosity based on the air temperature range. Operating outside of the recommended oil air temperature range may cause premature gear case failure.

IMPORTANT: ONLY use a quality oil in this gear

case. DO NOT mix any other oils in this gear case. DO NOT use BIO–HY– GARD® in this gear case.

The following John Deere gear case oil is

PREFERRED:

•GL-5 GEAR LUBRICANT®—SAE 80W-90.

Other gear case oils may be used if above recommended John Deere gear case oil is not available, provided they meet the following specification:

•API Service Classification GL–5.

SAE 80W-90

AIR TEMPERATURE

10 20 9

M58275

John Deere Dealers: You may want to cross-reference the following publications to recommend the proper oil for your customers:

•Module DX, GEOIL in JDS–G135;

•Section 530, Lubricants & Hydraulics, of the John Deere Merchandise Sales Guide;

•Lubrication Sales Manual PI7032.

10-20-9

Page 34

Fuels, Lubricants, and Coolants/Hydraulic/Transmission Oil

GEAR CASE OIL - EUROPE

MECHANICAL FRONT WHEEL DRIVE

Use the following oil viscosity based on the air temperature range. Operating outside of the recommended oil air temperature range may cause premature gear case failure.

IMPORTANT: ONLY use a quality oil in this gear

case. DO NOT mix any other oils in this gear case. DO NOT use BIO–HY– GARD® in this gear case.

The following John Deere gear case oil is

PREFERRED:

•EXTREME–GARD™—SAE 80W-90.

Other gear case oils may be used if above recommended John Deere gear case oil is not available, provided they meet the following specification:

•API Service Classification GL–5.

SAE 80W-90

AIR TEMPERATURE

M58275

John Deere Dealers: You may want to cross-reference the following publications to recommend the proper oil for your customers:

•Module DX,GEOIL in JDS–G135;

•Section 530, Lubricants & Hydraulics, of the John Deere Merchandise Sales Guide.

10-20-10

Page 35

Fuels, Lubricants, and Coolants/Hydraulic/Transmission Oil

GREASE - NORTH AMERICA (FOR ALL OTHER PRODUCTS AND

COMPONENTS NOT ALREADY COVERED)

Use the following grease based on the air temperature range. Operating outside of the recommended grease air temperature range may cause premature failures.

IMPORTANT: ONLY use a quality grease in this

application. DO NOT mix any other greases in this application. DO NOT use any BIO–GREASE in this application.

The following John Deere grease is PREFERRED:

•NON-CLAY HIGH-TEMPERATURE EP GREASE®—

JDM J13E4, NLGI Grade 2.

Other greases may be used if above preferred John Deere grease is not available, provided they meet the following specification:

•John Deere Standard JDM J13E4, NLGI Grade 2.

JDM J13E4

NLGI Grade 2

AIR TEMPERATURE

10 20 11

M58275

John Deere Dealers: You may want to cross-reference the following publications to recommend the proper grease for your customers:

•Module DX,GREA1 in JDS–G135;

•Section 530, Lubricants & Hydraulics, of the John Deere Merchandise Sales Guide;

•the Lubrication Sales Manual PI7032.

10-20-11

Page 36

Fuels, Lubricants, and Coolants/Hydraulic/Transmission Oil

GREASE - EUROPE

(FOR ALL OTHER PRODUCTS AND COMPONENTS NOT ALREADY COVERED)

Use the following grease based on the air temperature range. Operating outside of the recommended grease air temperature range may cause premature failures.

IMPORTANT: ONLY use a quality grease in this

application. DO NOT mix any other greases in this application. DO NOT use any BIO–GREASE in this application.

The following John Deere grease is PREFERRED:

•GREASE–GARD™—JDM J13E4, NLGI Grade 2.

Other greases may be used if above preferred John Deere grease is not available, provided they meet the following specification:

•John Deere Standard JDM J13E4, NLGI Grade 2.

JDM J13E4

NLGI Grade 2

AIR TEMPERATURE

M58275

John Deere Dealers: You may want to cross-reference the following publications to recommend the proper grease for your customers:

•Module DX, GREA1 in JDS–G135;

•Section 530, Lubricants & Hydraulics, of the John Deere Merchandise Sales Guide.

10-20-12

Page 37

Fuels, Lubricants, and Coolants/Hydraulic/Transmission Oil

ALTERNATIVE LUBRICANTS NORTH AMERICA

Conditions in certain geographical areas outside the United States and Canada may require different lubricant recommendations than the ones printed in this technical manual or the operator's manual. Consult with your John Deere Dealer, or Sales Branch, to obtain the alternative lubricant recommendations.

SYNTHETIC LUBRICANTS

Synthetic lubricants may be used in John Deere equipment if they meet the applicable performance requirements (industry classification and/or military specification) as shown in this manual.

The recommended air temperature limits and service or lubricant change intervals should be maintained as shown in the operator’s manual, unless otherwise stated on lubricant label.

IMPORTANT: Use of alternative lubricants could

cause reduced life of the component.

If alternative lubricants are to be used, it is recommended that the factory fill be thoroughly removed before switching to any alternative lubricant.

Avoid mixing different brands, grades, or types of oil. Oil manufacturers blend additives in their oils to meet certain specifications and performance requirements. Mixing different oils can interfere with the proper functioning of these additives and degrade lubricant performance.

10 20

LUBRICANT STORAGE

All machines operate at top efficiency only when clean lubricants are used. Use clean storage containers to handle all lubricants. Store them in an area protected from dust, moisture, and other contamination.

MIXING OF LUBRICANTS

In general, avoid mixing different brands or types of lubricants. Manufacturers blend additives in their lubricants to meet certain specifications and performance requirements.

OIL FILTERS

IMPORTANT: Filtration of oils is critical to proper

lubrication performance. Always change filters regularly.

The following John Deere oil filters are PREFERRED:

•AUTOMOTIVE AND LIGHT TRUCK ENGINE OIL FILTERS.

Most John Deere filters contain pressure relief and antidrainback valves for better engine protection.

Store drums on their sides. Make sure all containers are properly marked as to their contents. Dispose of all old, used containers and their contents properly.

Mixing different lubricants can interfere with the proper functioning of these additives and lubricant properties which will downgrade their intended specified performance.

Other oil filters may be used if above recommended John Deere oil filters are not available, provided they meet the following specification:

•ASTB Tested In Accordance With SAE J806. John Deere Dealers: You may want to cross-reference

the following publications to recommend the proper oil filter for your customers:

•Module DX, FILT in JDS–G135;

•Section 540, Lubricants & Hydraulics, of the John Deere Merchandise Sales Guide;

•Lawn & Grounds Care Tune-Up Guide PI672.

10-20-13

Page 38

Fuels, Lubricants, and Coolants/Hydraulic/Transmission Oil

ALTERNATIVE LUBRICANTS -

EUROPE

SYNTHETIC LUBRICANTS

Synthetic lubricants may be used in John Deere equipment if they meet the applicable performance requirements (industry classification and/or military specification) as shown in this manual.

The recommended air temperature limits and service or lubricant change intervals should be maintained as shown in the operator’s manual, unless otherwise stated on lubricant label.

IMPORTANT: Use of alternative lubricants could

cause reduced life of the component.

If alternative lubricants are to be used, it is recommended that the factory fill be thoroughly removed before switching to any alternative lubricant.

LUBRICANT STORAGE

MIXING OF LUBRICANTS

In general, avoid mixing different brands or types of lubricants. Manufacturers blend additives in their lubricants to meet certain specifications and performance requirements.

OIL FILTERS

IMPORTANT: Filtration of oils is critical to proper

lubrication performance. Always change filters regularly.

The following John Deere oil filters are PREFERRED:

•AUTOMOTIVE AND LIGHT TRUCK ENGINE OIL FILTERS.

Most John Deere filters contain pressure relief and antidrainback valves for better engine protection.

Store drums on their sides. Make sure all containers are properly marked as to their contents. Dispose of all old, used containers and their contents properly.

Mixing different lubricants can interfere with the proper functioning of these additives and lubricant properties which will downgrade their intended specified performance.

Other oil filters may be used if above recommended John Deere oil filters are not available, provided they meet the following specification:

•ASTB Tested In Accordance With SAE J806. John Deere Dealers: You may want to cross-reference

the following publications to recommend the proper oil filter for your customers:

•Module DX, FILT in JDS–G135;

•Section 540, Lubricants & Hydraulics, of the John Deere Merchandise Sales Guide;

•Lawn & Grounds Care Tune-Up Guide PI672.

10-20-14

Page 39

Fuels, Lubricants, and Coolants/Hydraulic/Transmission Oil

DIESEL ENGINE COOLANT NORTH AMERICA

The engine cooling system when filled with a proper dilution mixture of anti-freeze and deionized or distilled water provides year-round protection against corrosion, cylinder or liner pitting, and winter freeze protection down to –37°C (–34°F).

The following John Deere coolant is PREFERRED:

•PRE-DILUTED DIESEL ENGINE ANTI-FREEZE/ SUMMER COOLANT™ (TY16036).

This coolant satisfies specifications for “Automobile and Light Duty Engine Service” and is safe for use in John Deere Lawn and Grounds Care/Golf and Turf Division equipment, including aluminum block gasoline engines and cooling systems.

The above preferred pre-diluted anti-freeze provides:

•adequate heat transfer

•corrosion-resistant chemicals for the cooling system

•compatibility with cooling system hose and seal material

•protection during extreme cold and extreme hot weather operations

•chemically pure water for better service life

•compliance with ASTM D4656 (JDM H24C2) specifications

If above preferred pre-diluted coolant is not available, the following John Deere concentrate is

recommended:

•DIESEL ENGINE ANTI-FREEZE/SUMMER COOLANT CONCENTRATE™ (TY16034).

If either of above recommended engine coolants are available use any Automobile and Light Duty Engine Service ethylene glycol base coolant following specification:

•ASTM D3306 (JDM H24C1).

, meeting the

IMPORTANT: To prevent engine damage, DO NOT

use pure anti-freeze or less than a 50% anti-freeze mixture in the cooling system. DO NOT mix or add any additives/conditioners to the cooling system in Lawn and Grounds Care/ Golf and Turf Division equipment. Water used to dilute engine coolant concentrate must be of high quality— clean, clear, potable water (low in chloride and hardness–Table 1) is generally acceptable. DO NOT use salt water . Deionized or distilled water is ideal to use. Coolant that is not mixed to these specified levels and water purity can cause excessive scale, sludge deposits, and increased corrosion potential.

Table 1: Water Quality

Property Requirements

Total Solids, Maximum 340 ppm (20 grns/gal) Total Hardness, Max. 170 ppm (10 grns/gal) Chloride (as Cl), Max. 40 ppm (2.5 grns/gal) Sulfate (as SO

Mix 50 percent anti-freeze concentrate with 50 percent distilled or deionized water. This mixture and the prediluted mixture (TY16036) will protect the cooling system down to -37°C(-34°F) and up to 108°C (226°F).

Certain geographical areas may require lower air temperature protection. See the label on your antifreeze container or consult your John Deere dealer to obtain the latest information and recommendations.

), Max. 100 ppm (5.8 grns/gal)

10 20 15

Read container label completely before using and follow instructions as stated.

DIESEL ENGINE COOLANT DRAIN INTERVAL - NORTH AMERICA

When using John Deere Pre-Diluted (TY16036) Automobile and Light Duty Engine Service coolants, drain and flush the cooling system and refill with fresh coolant mixture every 36 months or 3,000 hours of operation, whichever comes first.

10-20-15

When using John Deere Concentrate (TY16034) Automobile and Light Duty Engine Service coolants, drain and flush the cooling system and refill with fresh coolant mixture every 24 months or 2,000 hours of operation, whichever comes first.

If above John Deere Automobile and Light Duty Engine Service coolants are not being used; drain, flush, and refill the cooling system according to instructions found on product container or in equipment operator’s manual or technical manual.

Page 40

Fuels, Lubricants, and Coolants/Hydraulic/Transmission Oil

DIESEL ENGINE COOLANT - EUROPE

The engine cooling system when filled with a proper dilution mixture of anti-freeze and deionized or distilled water provides year-round protection against corrosion, cylinder liner pitting, and winter freeze protection down to –37°C (–34°F).

The following John Deere coolant is PREFERRED:

•COOL–GARD COOLANT CONCENTRATE™. If above preferred coolant is not available, use any

Automobile and Light Duty Engine Service ethylene glycol base coolant, meeting the following specification:

•ASTM D3306 (JDM H24C1).

Read container label completely before using and follow instructions as stated.

IMPORTANT: To prevent engine damage, DO NOT

use pure anti-freeze or less than a 50% anti-freeze mixture in the cooling system. DO NOT mix or add any additives/conditioners to the cooling system in Lawn and Grounds Care/ Golf and Turf Division equipment. Water used to dilute engine coolant concentrate must be of high quality— clean, clear, potable water (low in chloride and hardness–Table 1) is generally acceptable. DO NOT use salt water. Deionized or distilled water is best to use. Coolant that is not mixed to these specified levels and water purity can cause excessive scale, sludge deposits, and increased corrosion potential.

Table 1: Water Quality

Property Requirements

Total Solids, Maximum 340 ppm (20 grns/gal) Total Hardness, Max. 170 ppm (10 grns/gal) Chloride (as Cl), Max. 40 ppm (2.5 grns/gal) Sulfate (as SO

), Max. 100 ppm (5.8 grns/gal)

DIESEL ENGINE COOLANT DRAIN INTERVAL - NORTH AMERICA

Mix 50 percent anti-freeze concentrate with 50 percent distilled or deionized water. This mixture will protect the cooling system down to -37°C(-34°F) and up to 108°C (226°F).

10-20-16

Page 41

PRODUCT SERIAL NUMBER

Group 25

Serial Number Locations

The tractor’s 13-digit product serial number is located below rear PTO on transmission case.

Product Serial Number

ENGINE SERIAL NUMBER

The tractor’s engine serial number (A) is located on valve cover.

Engine Serial Number

10 25 1

M39695 -UN-09SEP88

MX,HU,1025,1 -19-16OCT91

M39696 -UN-09SEP88

MX,HU,1025,2 -19-16OCT91

TRANSAXLE SERIAL NUMBER

The transaxle serial number plate is located on flat surface (A) below left-hand rockshaft lift arm.

Transaxle Serial Number

MOWER DECK SERIAL NUMBER

The mower deck serial number plate is located at various points on the different mower decks available for these tractors.

Mower Deck Serial Number

M48511 -UN-05APR90

MX,HU,1025,3 -19-16OCT91

MX,HU,1025,4 -19-16OCT91

TM1360 (16OCT91) 10-25-1 55, 56 Series Tractors

010395

M35734 -UN-27NOV89

Page 42

10 25

Serial Number Locations/Mower Deck Serial Number

TM1360 (16OCT91) 10-25-2 55, 56 Series Tractors

010395

Page 43

Section 20

Page

Group 05—Yanmar Diesel Engine Repair

John Deere Series 220 Diesel Engines . . . .20-05-1

Group 10—Remove and Install Oil Cooler

Remove and Install Oil Cooler . . . . . . . . . . .20-10-1

Group 15—Remove and Install Radiator

Service Equipment and Tools. . . . . . . . . . . .20-15-1

Specifications. . . . . . . . . . . . . . . . . . . . . . . .20-15-1

Remove and Install Radiator . . . . . . . . . . . .20-15-2

Group 20—Remove and Install Diesel Engine

Remove and Install Diesel Engine. . . . . . . .20-20-1

Diesel Engine Repair

Contents

20-1

Page 44

Contents

TM1360 (16OCT91) 20-2 55, 56 Series Tractors

010395

Page 45

JOHN DEERE/YANMAR DIESEL ENGINE REPAIR—JOHN DEERE SERIES 220 DIESEL ENGINES

Group 05

Yanmar Diesel Engine Repair

For complete repair information, the COMPONENT TECHNICAL MANUAL (CTM) is also required, use JOHN DEERE SERIES 220 DIESEL ENGINES—CTM3 (10AUG93 or later) in conjunction with this machine manual.

20 05

20-05-1

Page 46

20 05

Diesel Engine Repair—CTM3

TM1360 (16OCT91) 20-05-2 55, 56 Series Tractors

010395

Page 47

REMOVE AND INSTALL OIL COOLER

NOTE: Late model 755/756 Tractor shown. See

Remove and Install Radiator in Group 15 of this section for steps required to reach disassembly point shown. Have a clean oil pan, several shop cloths, and two oil caps and plugs ready to catch, trap, and/or clean-up hydraulic oil.

1. Remove two cap screws (A).

2. Disconnect oil cooler lines (B).

3. Lift cooler from base clips (C), one on each side.

4. Drain oil cooler and remove to bench.

5. Remove and discard O-rings.

6. Install new O-rings.

Group 10

Remove and Install Oil Cooler

7. Set oil cooler in base clips (C), one on each side.

IMPORTANT: Do not flex oil cooler lines.

Hydrostatic line fittings must align with oil cooler fittings before lines are installed onto oil cooler.

8. Loosen clamp that retains hydraulic lines to the

frame.

9. Move hydraulic line’s until hydraulic line and oil cooler

line fitting’s align.

10. Connect oil cooler lines (B) and tighten clamp. If at

this time hydraulic oil cooler line’s do not align, bend slightly until they do align.

11. Install and tighten two cap screws (A).

12. See Remove and Install Radiator in this section for

final assembly steps.

M42294

20-10-1

Page 48

20 10

Remove and Install Oil Cooler/Remove and Install Oil Cooler

TM1360 (16OCT91) 20-10-2 55, 56 Series Tractors

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Page 49

Group 15

Remove and Install Radiator

SERVICE EQUIPMENT AND TOOLS

NOTE: Order tools from the U.S. SERVICE-GARD™ Catalog or from the European Microfiche Tool Catalog (MTC).

Some tools may be available from a local supplier.

Name Use

Overhead 1/2 Ton Hoist Pull Engine

SPECIFICAT IONS

Item Measurement Specification

Fan Blade Radiator Clearance 12mm (1/2 in.)

Engine Side Panel Mounting Tabs Ce nter D istance 655—508 mm (20 in.)

755/756—562 mm (22.1 in.)

855/856/955—567 mm (22.3 in.)

20-15-1

Page 50

Remove and Install Radiator/Remove and Install Radiator

REMOVE AND INSTALL RADIATOR

NOTE: On 955 Tractors and 855/856 Tractors (S/N

615001—999,999 and 1990 model S/N 10,001— ) the fuel tank and battery locations have been switched. Early model tractor used for illustrations.

1. Remove grille, side shields and hood.

2. Drain radiator.

3. Remove three hoses (A) and oil cooler (B), see REMOVE AND INSTALL OIL COOLER in Group 10 earlier in this section.

4. Disconnect return fuel line (C) and pump fuel line (D) from engine. Pull lines forward from radiator support.

5. Disconnect sender harness (E) leads form fuel tank sender and pull rearward from radiator support.

6. Disconnect radiator/hood support (F) from upper radiator bracket (G).

7. Remove radiator/hood support (F) lower frame bolts from both sides.

8. Have a person pull forward on fuel tank while you pull up and forward on radiator to clear frame locater pins and fan.

9. Distance (A) between fan blade and inner face of shroud must be at least 12 mm (1/2 in.).

10. If less than 12 mm (1/2 in.), make certain two shims have been inserted under each front engine mount (655).

M70400 -UN-21MAR90

A—Radiator and Air Intake Hoses B—Oil Cooler C—Return Fuel Line D—Pump Fuel Line E—Fuel Sender Harness F—Radiator/Hood Support G—Upper Radiator Bracket

MX,HU,2015,1D -19-16OCT91

MX,HU,2015,2 -19-16OCT91

TM1360 (16OCT91) 20-15-2 55, 56 Series Tractors

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M43760 -UN-31AUG88

Page 51

Remove and Install Radiator/Remove and Install Radiator

11. If shims are in place, reposition radiator forward to obtain at least 12 mm (1/2 in.) clearance. Tighten mounting bolts (A).

12. Center distance between engine side panel mounting tabs (B and C) must be:

508 mm (20 in.) on 655 562 mm (22.1 in.) on 755/756 567 mm (22.3 in.) on 855/856/955

20 15 3

M43761 -UN-31AUG88

MX,HU,2015,3 -19-16OCT91

TM1360 (16OCT91) 20-15-3 55, 56 Series Tractors

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Page 52

20 15

Remove and Install Radiator/Remove and Install Radiator

TM1360 (16OCT91) 20-15-4 55, 56 Series Tractors

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Page 53

REMOVE AND INSTALL DIESEL ENGINE

NOTE: Early model tractor used for illustrations. On 955

Tractors and 855 Tractors (S/N 615001—999,999 and 1990 model S/N 10,001— ) the fuel tank and battery locations have been switched.

Group 20

Remove and Install Diesel Engine

1. Remove grille, side shields, hood, oil cooler, fuel tank and radiator.

2. Remove items (A — H), lay firewall panel on top of dash so you don’t have to disconnect the fuse block.

A—Battery B—Pedestal Side Panels C—Starting Aid Module With Base D—Firewall Panel E—Battery Tray With Cables F—Muffler Heat Shield G—Exhaust Pipe H—Muffler

3. Install lifting eye (A) in upright position.

IMPORTANT: Install plug and cap to keep dirt out of

fuel system.

20 20 1

M70680 -UN-21MAR90

MX,HU,2020,1 -19-16OCT91

4. Disconnect items (B through G).

A—Lifting Eye B—Fuel Line C—Throttle Cable Clamps D—Fuel Pump Connector E—Oil Pressure Sending Unit F—Fuel Shut-Off Connector G—Glow Plug (655/755/756) or Air Heater

(855/856/955) Terminal

MX,HU,2020,2 -19-16OCT91

TM1360 (16OCT91) 20-20-1 55, 56 Series Tractors

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M43688 -UN-08SEP88

Page 54

5. Disconnect items (A - F).

A—Drive Shaft Isolator B—Starter Connections C—Alternator Connections D—Tachometer Cable E—Temperature Sender F—Harness Clamp

20 20

Remove and Install Diesel Engine/Remove and Install Diesel Engine

6. Remove four engine mounting bolts (A).

7. Remove engine from tractor frame. Keep shims (B), if equipped, for engine installation (655 Tractors Only).

INSTALLATION:

8. Reverse removal procedures noting the following items:

—Reinstall same number of shims (B) as removed on 655 Tractor.

—See Section 220, Group 10 for proper adjustment of throttle cable and fuel shut-off solenoid.

M43689 -UN-08SEP88

MX,HU,2020,3 -19-16OCT91

MX,HU,2020,4 -19-16OCT91

TM1360 (16OCT91) 20-20-2 55, 56 Series Tractors

010395

M43690 -UN-31AUG88

Page 55

Page

Group 05—Fuel Transfer Pump

Remove and Install Fuel Transfer Pump . . .30-05-1

Group 10—Fuel Tank

Remove and Install Fuel Tank . . . . . . . . . . .30-10-1

Group 15—Fuel Tank Tube and Sender

Remove and Install Fuel Tank Tube

and Sender . . . . . . . . . . . . . . . . . . . . . . . .30-15-1

Group 20—Air Cleaner

Specifications. . . . . . . . . . . . . . . . . . . . . . . .30-20-1

Remove and Install Air Cleaner . . . . . . . . . .30-20-2

Remove and Install Air Restriction

Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . .30-20-4

Section 30

Fuel and Air Repair

Contents

30-1

Page 56

Contents

TM1360 (16OCT91) 30-2 55, 56 Series Tractors

010395

Page 57

REMOVE AND INSTALL FUEL TRANSFER PUMP

1. Lift hood. Remove right-hand engine shield.

2. Disconnect power lead (A).

3. Loosen hose clamps (B). Remove hoses from fuel pump. Plug hoses to prevent fuel contamination.

4. Remove cap screws (C). Remove fuel pump.

Group 05

Fuel Transfer Pump

5. Install and fasten new fuel pump to bracket. Be sure end of pump marked “IN” is to the front of tractor.

6. Connect fuel hoses and power lead.

7. Bleed fuel injection system. (Refer to Section 220.)

All 955 Tractors and late model 855 Tractors (S/N 615001—999,999 and 1990 models S/N 10,001— ) use a mechanical fuel pump.

30 05 1

M43633 -UN-31AUG88

MX,HU,3005,1 -19-16OCT91

955 Tractor Shown

MX,HU,3005,2 -19-16OCT91

TM1360 (16OCT91) 30-05-1 55, 56 Series Tractors

010395

M48512 -UN-12MAR90

Page 58

30 05

Fuel Transfer Pump/Remove and Install Fuel Transfer Pump

TM1360 (16OCT91) 30-05-2 55, 56 Series Tractors

010395

Page 59

REMOVE AND INSTALL FUEL TANK

NOTE: 755/756 Tractors illustrated only.

1. Remove front grill screen assembly.

2. Remove cap screws (A) on both sides of tractor.

3. Loosen nuts and remove front plate.

Group 10

Fuel Tank

M43526 -UN-31AUG88

MX,HU,3010,1 -19-16OCT91

30 10 1

4. Remove hose (A) and cap screws (B).

5. Disconnect lighting wire connector (C).

6. Remove fuel tank cap, spill cup, and drain hose.

7. Remove hood.

M43527 -UN-31AUG88

MX,HU,3010,2 -19-16OCT91

MX,HU,3010,3 -19-16OCT91

TM1360 (16OCT91) 30-10-1 55, 56 Series Tractors

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M43528 -UN-31AUG88

Page 60

Fuel Tank/Remove and Install Fuel Tank

8. Remove and plug or cap fuel lines (A and B).

9. Disconnect wires (C and D).

10. Remove fuel tank.

11. Check fuel tank for cracks, holes or worn spots. Replace tank if damaged.

IMPORTANT: Replace foam seals or pads whenever

fuel tank is removed and installed.

12. Install fuel tank in reverse order of removal. Make

certain all rubber seals and front pads are in proper

locations and in good condition.

M48002 -UN-31AUG88

A—Supply line B—Return line C—Black Wire D—Black/White Striped Wire

MX,HU,3010,4 -19-16OCT91

TM1360 (16OCT91) 30-10-2 55, 56 Series Tractors

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REMOVE AND INSTALL FUEL TANK TUBE AND SENDER

NOTE: 755 Tractor illustrated only.

1. Remove and plug fuel lines (A and B).

2. Disconnect wires (C and D).

3. Remove screws (E).

Group 15

Fuel Tank Tube and Sender

4. Remove tube and sender from tank.

NOTE: See Remove and Install Fuel Tank for Sender

access.

5. Remove filter screen (A). Clean and inspect screen and hose for damage. Replace as necessary. Keep length of hose and pickup same as original.

6. Inspect float (B) for cracks or damage. Replace as necessary.

7. Inspect gasket (C) for deterioration. Replace as necessary.

A—Supply line B—Return line C—Black Wire D—Black/White Striped Wire E—Screws

M48003 -UN-31AUG88

30 15 1

MX,HU,3015,1 -19-16OCT91

M43651 -UN-31AUG88

MX,HU,3015,2 -19-16OCT91

8. Install gasket (A) and align holes. Start screws through gasket.

9. Install tube and sender. Tighten screws securely.

10. Reinstall hoses and wires.

11. Bleed fuel system. See BLEED FUEL INJECTION SYSTEM in Section 220.

MX,HU,3015,3 -19-16OCT91

TM1360 (16OCT91) 30-15-1 55, 56 Series Tractors

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M43652 -UN-31AUG88

Page 62

30 15

Fuel Tank Tube and Sender/Remove and Install Fuel Tank Tube and Sender

TM1360 (16OCT91) 30-15-2 55, 56 Series Tractors

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Page 63

Air Cleaner

SPECIFICAT IONS

Item Measurement Specification

Primary Air Cleaner Air Restriction 635 mm (25 in.) Vacuum

Secondary Air Cleaner Air Restriction 508 mm (20 in.) Vacuum

Group 20

Air Restriction Indicator Torque FINGER TIGHT ONLY

30 20

30-20-1

Page 64

Air Cleaner/Remove and Install Air Cleaner

REMOVE AND INSTALL AIR CLEANER— 655, 755/756 AND EARLY 855/856 TRACTORS

IMPORTANT: DO NOT clean the primary air cleaner

element with water or compressed air . Replace it only when the air restriction indicator shows 635 mm (25 in.) of vacuum or locks into the red position.

30 20

1. STOP engine, set park brake, and open hood.

2. Remove outside wing nut with washer (A) to remove cover assembly (B).

3. Remove inside wing nut with washer (C) and primary element (D).

Tapping the filter on a hard surface Does Not Help to clean it! It may dent the wire mesh bringing the paper element in contact with the mesh. During normal operation the filter will vibrate and if it’s touching the wire mesh, a hole will develop in the paper .

M62774

IMPORTANT: Ensure the washer is used with the

wing nut, this will ensure that only filtered air enters the combustion chamber. A properly secured air filter can not be rotated with one hand.

4. Install new element and secure with wing nut and washer.

5. Install cover and secure with wing nut and washer.

6. Push reset button (A) on air restriction indicator. Indicator must reset.

7. START engine and allow to run one minute at maximum speed.

8. STOP engine and check air restriction indicator. If indicator shows 508 mm (20 in.) or more vacuum, replace secondary element.

SECONDARY ELEMENT REPLACEMENT IMPORTANT: DO NOT clean secondary element,

replace it only when air restriction indicator shows 508 mm (20 in.) vacuum and new primary element has been installed. DO NOT remove secondary element unless both these conditions are present.

M62775

M62776

9. Remove primary element as described above, but do not discard primary element.

10. Remove innermost wing nut and washer (A), remove secondary element (B) and discard.

30-20-2

M62777

Page 65

Air Cleaner/Remove and Install Air Cleaner

11. Install new secondary element and secure with

wing nut and washer.

12. Install primary element and secure with wing nut

and washer.

13. Install cover and secure with wing nut and washer.

14. Push reset button on air restriction indicator.

Indicator must reset.

REMOVE AND INSTALL AIR CLEANER— LATE 855 AND ALL 955 TRACTORS

IMPORTANT: DO NOT clean the primary air cleaner

element with water or compressed air . Replace it only when the air restriction indicator shows 635 mm (25 in.) of vacuum or locks into the red position. Tapping the filter on a hard surface Does Not Help to clean it! It may dent the wire mesh bringing the paper element in contact with the mesh. During normal operation the filter will vibrate and if it’s touching the wire mesh, a hole will develop in the paper .

1. STOP engine, set park brake, and remove grille.

30 20

M62586

2. Loosen two wing nuts (A) and adjacent intake hose

clamp to rotate air cleaner assembly forward for access.

3. Remove outside wing nut with washer (B) to remove

cover assembly.

4. Remove inside wing nut with washer (C) and primary

element (D).

IMPORTANT: Ensure the washer is used with the

wing nut, this will ensure that only filtered air enters the combustion chamber. A properly secured air filter can not be rotated with one hand.

5. Install new element and secure with wing nut and

washer.

6. Install cover and secure with wing nut and washer.

7. Push reset button (A) on air restriction indicator.

Indicator must reset.

8. START engine and allow to run one minute at

maximum speed.

9. STOP engine and check air restriction indicator. If

indicator shows 508 mm (20 in.) or more vacuum, replace secondary element.

M62587

M62588

30-20-3

Page 66

Air Cleaner/Remove and Install Air Cleaner

SECONDARY ELEMENT REPLACEMENT IMPORTANT: DO NOT clean secondary element,

replace it only when air restriction indicator shows 508 mm (20 in.) vacuum and new primary element has been installed. DO NOT remove secondary element unless both these conditions are present.

10. Remove primary element as described above, but

do not discard primary element.

11. Remove innermost wing nut and washer (A), remove secondary element (B) and discard.

12. Install new secondary element and secure with wing nut and washer.

13. Install primary element and secure with wing nut and washer.

14. Install cover and secure with wing nut and washer.

15. Rotate assembly into position, tighten two wing nuts and hose clamp.

M62798

16. Push reset button on air restriction indicator. Indicator must reset. Install grille.

REMOVE AND INSTALL AIR RESTRICTION INDICATOR

IMPORTANT: A faulty air restriction indicator, that

goes undetected, may cause a dusted engine. Make sure all air restriction indicators are in good condition and the proper air restriction indicator is installed (DIESEL INDICATOR ON DIESEL ENGINE) before any tractor so equipped is released to the customer. Always test new indicators.

1. Remove the air restriction indicator (A) with your fingers—DO NOT use a pliers.

2. Carefully clean the inlet area of the indicator without getting dirt inside.

3. Put the inlet in your mouth and suck until the indicator locks in the red position.

4. Remove the inlet from your mouth and push the reset button. The indicator should reset to zero. If the indicator does not lock in the red or will not reset, check for air leaks in the filtered portion of the intake system. If remote mounted, check for leaks in the restriction indicator hose. Replace if necessary.

Air Restriction Indicator may differ

Note:

from depiction

M62776

5. Reinstall the indicator finger tight. Overtightening will crack the housing.

30-20-4

Page 67

Page

Group 05—Alternator Repair Specifications

Service Equipment and Tools. . . . . . . . . . . .40-05-1

Specifications. . . . . . . . . . . . . . . . . . . . . . . .40-05-1

Alternator Repair . . . . . . . . . . . . . . . . . . . . .40-05-1

Group 10—Alternator Installation

Installation Procedures. . . . . . . . . . . . . . . . .40-10-1

Section 40

Alternator Repair

Contents

40-1

Page 68

Contents

TM1360 (16OCT91) 40-2 55, 56 Series Tractors

010395

Page 69

Group 05

Alternator Repair Specifications

SERVICE EQUIPMENT AND TOOLS

NOTE: Order tools from the U.S. SERVICE-GARD™ Catalog or from the European Microfiche Tool Catalog (MTC).

Some tools may be available from a local supplier.

Name

Volt-Ohm-Amp Meter Check continuity

13-Ton Bearing Puller Set Remove rotor shaft bearing

Soldering Gun (120 Watt Capacity) & Solder (Only 60-40 Rosin Core)

Sandpaper (No. 00 or 400-Grit Silicon Carbide Paper) Polish Slip Rings

Use

Disconnect/Connect Wire Terminals

SPECIFICAT IONS

Item: Alternator: Specifications:

Minimum Exposed Brush Length Nippon Denso 35 Amp

Nippon Denso 40 Amp

Maximum Exposed New Brush Length Nippon Denso 35 Amp

Nippon Denso 40 Amp

5.5 mm (0.22 in.)

4.5 mm (0.18 in.)

13.0 mm (0.50 in.)

10.5 mm (0.41 in.)

40 05 1

Sheave Nut Torque Nippon Denso 35 Amp

Nippon Denso 40 Amp

Belt Deflection All Engines 10-15 mm (0.400-0.600 in.) at

54 N•m (40 lb-ft.) 69 N•m (51 lb-ft.)

98N (22lb) Force Between Sheaves.

ALTERNATOR REPAIR

For complete repair information, the COMPONENT TECHNICAL MANUAL (CTM) is also required. Use (10Aug93 or later) to repair all alternators.

40-05-1

Page 70

40 05

Alternator Repair Specifications/Specifications

TM1360 (16OCT91) 40-05-2 55, 56 Series Tractors

010395

Page 71

INSTALLATION PROCEDURES

IMPORTANT: If replacing original alternator with

service alternator be sure to order correct mounting hardware. These installation procedures apply to the following engine serial numbers 655 (sn 025201 and below), 755 (s/n 030103 and below), 855 (s/n -009848 and below), and 955 (s/n -009848 and below). For all other alternators the procedures differ slightly. Use exploded view for reference.

NOTE: For 855’s only. If alternator belt cannot be

removed (because top mounting tab hits muffler when pushed in) grind away back edge to provide clearance. This has already been done on engines s/n CH3033A010453 and above.

Group 10

Alternator Installation

1. Remove and discard original 8 mm diameter lower

mounting bolt (A).

2. The rear (engine block) side of the lower engine

alternator mounting boss is threaded to access a 10 mm bolt or stud (B).

3. (655 & 755) Install the appropriate length 10 mm

pivot bolt and tighten to 27 N•m (20 lb-ft).

4. (855 & 955) Install stud in lower pivot hole on radiator

side. Slide alternator pivot hole over stud and secure with nut tightened to 48•m (35 lb-ft).

5. Install belt on alternator pulley.

6. Belt should deflect approximately 10-15 mm (0.400-

0.600 in.) at 98N (22lb) force between sheaves. Check

belt tension between fan and alternator using belt tension gauge and a straight edge.

7. To adjust belt, loosen adjusting nut, apply pressure to

front alternator housing only (near the belt) until tension is correct, then tighten nut.

8. Tighten remaining hardware. See Section 10 Group

15 Repair Information for additional torque values.

9. Install red wire to top stud terminal (positive

terminal).

M85128

35-Amp Alternator

10. Plug yellow/brown wire connector into connector at

rear of housing (charging system).

11. Install black wire to bottom bolt at rear of housing

(ground terminal).

NOTE: There is no separate voltage regulator. The

regulator was built into original 35-amp alternator and is built into new 40-amp alternator.

40-10-1

M85129

40-Amp Alternator

Page 72

Alternator Installation/Installation

40-10-2

Page 73

Contents

Page

Section 50

Power Train Repair

Page

Group 05—Hydrostatic Transmission

Service Equipment and Tools. . . . . . . . . . . .50-05-1

Specifications. . . . . . . . . . . . . . . . . . . . . . . .50-05-2

Remove/Install Sheet Metal Panels. . . . . . .50-05-2

Remove Drive Shaft. . . . . . . . . . . . . . . . . . .50-05-3

Install Drive Shaft. . . . . . . . . . . . . . . . . . . . .50-05-4

Remove/Install MFWD Drive Shaft . . . . . . .50-05-4

Remove/Install Charge Pump . . . . . . . . . . .50-05-5

Remove Hydrostatic Transmission. . . . . . . .50-05-6

Cross-Section View

Hydrostatic Transmission . . . . . . . . . . . .50-05-10

Disassemble Transmission . . . . . . . . . . . .50-05-11

Cross-Section View—Center Section . . . .50-05-18

Assemble Transmission. . . . . . . . . . . . . . .50-05-20

Install Transmission . . . . . . . . . . . . . . . . . .50-05-25

Service Procedure . . . . . . . . . . . . . . . . . . .50-05-28

Flush Hydraulic System . . . . . . . . . . . . . . .50-05-28

Bleed Hydraulic System. . . . . . . . . . . . . . .50-05-28

Group 10—Transaxle

Service Equipment and Tools. . . . . . . . . . . .50-10-1

Fabricated Tools. . . . . . . . . . . . . . . . . . . . . .50-10-1

Other Materials. . . . . . . . . . . . . . . . . . . . . . .50-10-2

Specifications. . . . . . . . . . . . . . . . . . . . . . . .50-10-3

Replace Seals . . . . . . . . . . . . . . . . . . . . . . .50-10-5

Removal Preparations . . . . . . . . . . . . . . . . .50-10-5

Disconnect Linkage . . . . . . . . . . . . . . . . . . .50-10-6

Remove Transaxle. . . . . . . . . . . . . . . . . . . .50-10-8

Remove Final Drive Axles . . . . . . . . . . . . . .50-10-9

Cross-Section View . . . . . . . . . . . . . . . . . .50-10-12

Repair Oil Supply System . . . . . . . . . . . . .50-10-14

Repair PTO Inertia Brake. . . . . . . . . . . . . .50-10-15

Repair PTO Valves. . . . . . . . . . . . . . . . . . .50-10-17

Repair Rear PTO Shaft Assembly . . . . . . .50-10-19

Repair Differential Assembly . . . . . . . . . . .50-10-20

Repair MFWD Gear Case Assembly . . . . .50-10-23

Remove Front Gear Case Cover . . . . . . . .50-10-26

Remove Gear Shaft Assemblies . . . . . . . .50-10-27

Repair PTO Shift Fork Assembly. . . . . . . .50-10-29

Repair PTO Reduction Shaft Assembly. . .50-10-32

Repair Main PTO Shaft Assembly . . . . . . .50-10-33

Repair Mid PTO Shaft Assembly . . . . . . . .50-10-34

Repair Reduction Shaft Assembly . . . . . . .50-10-35

Repair Range Shift Fork Assembly . . . . . .50-10-42

Repair PTO Clutch Assembly . . . . . . . . . .50-10-43

Cross-Section View—PTO Clutch . . . . . . .50-10-47

Assemble PTO Clutch . . . . . . . . . . . . . . . .50-10-47

Install PTO Clutch Assemblies . . . . . . . . . 50-10-50

Repair Differential Drive Shaft Assembly . 50-10-50 Install Differential Drive Shaft Assembly. . 50-10-51

Install Mid PTO Shaft Assembly . . . . . . . . 50-10-52

Install Hi/Lo Reduction Shaft Assembly . . 50-10-52 Install Mid PTO Transfer Gear

Assembly . . . . . . . . . . . . . . . . . . . . . . . . 50-10-52

Install Front Case Cover Assembly. . . . . . 50-10-53

Install MFWD Gear Case Assembly . . . . . 50-10-55

Adjust Backlash—Differential Assembly. . 50-10-56

Install Rear PTO Shaft Assembly . . . . . . . 50-10-59

Install Rear Case Cover Assembly. . . . . . 50-10-59

Install PTO Valve Assemblies. . . . . . . . . . 50-10-60

Install PTO Inertia Brake Assembly . . . . . 50-10-61

Install Oil Supply System . . . . . . . . . . . . . 50-10-62

Install Final Drive Axle Assemblies. . . . . . 50-10-63

Install Transaxle . . . . . . . . . . . . . . . . . . . . 50-10-65

Install Hydrostatic Transmission. . . . . . . . 50-10-65

Install Linkage. . . . . . . . . . . . . . . . . . . . . . 50-10-67

Install ROPS . . . . . . . . . . . . . . . . . . . . . . . 50-10-68

Install Rear Wheels. . . . . . . . . . . . . . . . . . 50-10-69

Install Rockshaft Housing Assembly. . . . . 50-10-69

Connect Flow Divider and Selective

Control Valves . . . . . . . . . . . . . . . . . . . . 50-10-69

Fill Hydraulic System Reservoir . . . . . . . . 50-10-69

Bleed Hydraulic System . . . . . . . . . . . . . . 50-10-70

Adjust Control Linkages . . . . . . . . . . . . . . 50-10-70

Group 15—Final Drives

Service Equipment And Tools. . . . . . . . . . . 50-15-1

Other Material. . . . . . . . . . . . . . . . . . . . . . . 50-15-1

Specifications . . . . . . . . . . . . . . . . . . . . . . . 50-15-2

Remove Final Drives. . . . . . . . . . . . . . . . . . 50-15-2

Planetary Carrier End Play Specification . . 50-15-4

Disassemble Final Drives . . . . . . . . . . . . . . 50-15-5

Repair Planetary Gear Assembly . . . . . . . . 50-15-6

Remove Brake Camshaft Assembly. . . . . 50-15-10

Remove Axle Shafts . . . . . . . . . . . . . . . . . 50-15-10

Remove Oil Seal Wear Sleeve and

Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . 50-15-11

Repair Axle Housing Assembly. . . . . . . . . 50-15-11

Assemble Axle Housing Assembly . . . . . . 50-15-13

Install Brake Camshaft Assembly . . . . . . . 50-15-14

Install Planetary Gear Assembly. . . . . . . . 50-15-14

Continued on next page

50-1

Page 74

Group 15—Final Drives Continued

Install Final Drives . . . . . . . . . . . . . . . . . . 50-15-16

Install ROPS and Final Assembly. . . . . . . 50-15-18

Bleed Hydraulic System . . . . . . . . . . . . . . 50-15-19

Adjust Control Linkages . . . . . . . . . . . . . . 50-15-19

Group 20—Mechanical Front Wheel Drive

(MFWD)

Specifications . . . . . . . . . . . . . . . . . . . . . . . 50-20-1

Other Material. . . . . . . . . . . . . . . . . . . . . . . 50-20-1

Service Equipment and Tools. . . . . . . . . . . 50-20-2

Remove MFWD Axle . . . . . . . . . . . . . . . . . 50-20-2

Disassemble Final Drive Case . . . . . . . . . . 50-20-4

Disassemble Spindle Gear Case . . . . . . . 50-20-10

Cross-Section View . . . . . . . . . . . . . . . . . 50-20-16

Assemble Spindle Gear Case . . . . . . . . . 50-20-18

Disassemble Differential Input Housing . . 50-20-23

Disassemble Differential. . . . . . . . . . . . . . 50-20-24

Assemble Differential . . . . . . . . . . . . . . . . 50-20-26

Assemble Axle Housings . . . . . . . . . . . . . 50-20-30

Adjust Front Axle End-Play. . . . . . . . . . . . 50-20-32

Adjust Front Axle Toe-In . . . . . . . . . . . . . . 50-20-32

Contents

Page

Group 25—Power Train Gears and Shafts

Exploded View . . . . . . . . . . . . . . . . . . . . . . 50-25-2

Group 30—Speed Control Linkage

Specifications . . . . . . . . . . . . . . . . . . . . . . . 50-30-1

Remove Speed Control Linkage. . . . . . . . . 50-30-1

3-Dimensional View . . . . . . . . . . . . . . . . . . 50-30-6

Install Speed Control Linkage. . . . . . . . . . . 50-30-7

50-2

Page 75

Group 05

Hydrostatic Transmission

SERVICE EQUIPMENT AND TOOLS

NOTE: Order tools from the U.S. SERVICE-GARD™ or from the European Microfiche Tool Catalog (MTC).

Some tools may be available from a local supplier.

Name

Bushing, Bearing, and Seal Driver Set To service bearings and seals.

2-Jaw Slide Hammer Puller To remove bearings.

Knife-Edge Puller To remove bearings.

Hydraulic Press To service bearings.

Snap Ring Pliers Set To remove snap rings.

Overhead Hoist To remove hydrostatic transmission.

Work Bench Fixture To disassemble hydrostatic transmission.

#4—40 x 1 UNC-2B Cap Screw To remove motor bearings retaining pin (Early Models).

#8—32 x 1 UNC-2B Cap Screw To remove motor bearings retaining pin (Late Models).

Use

05 1

50-05-1

Page 76

Hydrostatic Transmission/Remove/Install Sheet Metal Panels

SPECIFICATIONS

Item Measurement Specification

Charge Pump Cap Screw Torque 37—50 N•m (27—37 lb-ft)

Charge Inlet Fitting Torque 95—230 N•m (70—170 lb-ft)

Drive Shaft-to-Engine Cap Screw Torque 49 N•m (35 lb-ft)

Drive Shaft-to-Hydro Cap Screw Torque 60 N•m (45 lb-ft)

Neutral Return Lever Bushing Inside Diameter 19.088 ± 0.025 mm

(0.7515 ± 0.001 in)

Drive Shaft Coupler to Hydro Input

Torque 60 N•m (45 lb-ft)

Shaft

Swash Plate End Caps Cap Screw Torque 8—9 N•m (72—84 lb-in)

Transmission Center

Cap Screw Torque 44—55 N•m (33—41 lb-ft)

Section-to-Housing

Gear-to-Output Shaft Cap Screw Torque (Early Models)

Castle Nut Torque (Late Models)

54 N•m (40 lb-ft) 109 N•m (80 lb-ft)

Transmission Attaching Cap Screw Torque 142 N•m (105 lb-ft)

Neutral Return Lever Spring Adjusted Coil Length 133 mm (5.25 in)

Plugs:

3/4-16 SAE O-ring Torque 45—95 N•m (33—70 lb-ft)

1/4-20 SAE O-ring Torque 4—7 N•m (36—60 lb-in)

REMOVE AND INSTALL SHEET METAL PANELS

1. Park tractor safely. Lock park brake, remove key.

2. Turn depth control lever (A) clockwise until it stops.

3. Remove four cap screws. To remove panel (B), lift up on right rear corner of panel first, then lift left side to clear head of depth control bolt, and move panel out from the right side of the tractor.

50-05-2

M43634

Page 77

Hydrostatic Transmission/Remove Drive Shaft

NOTE: 755/756, 855/856, and 955 tractors have two

additional side cap screws under each fender.

4. Remove panel (A).

NOTE: Panel need not be removed for driveshaft and

charge pump repair.

5. Install in reverse order. Be sure depth control lever aligns with bolt head.

M43638 -UN-31AUG88

655 Shown

MX,HU,5005,7 -19-16OCT91

REMOVE DRIVE SHAFT

1. Loosen two bolts (A) of drive shaft coupler.

2. Remove six cap screws (A).

3. Push driveshaft (B) back to remove isolator (C).

4. Remove driveshaft.

50 05 3

M43635 -UN-31AUG88

MX,HU,5005,8 -19-16OCT91

MX,HU,5005,9 -19-16OCT91

TM1360 (16OCT91) 50-05-3 55, 56 Series Tractors

010395

M43512 -UN-31AUG88

Page 78

Hydrostatic Transmission/Remove/Install MFWD Drive Shaft

INSTALL DRIVE SHAFT

1. Put drive shaft (B) on transmission.

2. Install isolator (C). Be sure raised portion of unthreaded holes are toward engine.

3. Fasten isolator to engine with three longer cap screws and fasten drive shaft to isolator with three shorter cap screws (A). Tighten cap screws to 49 N·m (36 lb-ft).

4. Tighten two bolts (A) of drive shaft coupler to 60 N·m (45 lb-ft).

M43512 -UN-31AUG88

MX,HU,5005,10 -19-16OCT91

50 05

REMOVE AND INSTALL MFWD DRIVE SHAFT

1. Loosen clamps. Slide front and rear covers away from universal joints.

M43511 -UN-31AUG88

MX,HU,5005,11 -19-16OCT91

M37522 -UN-06SEP88

MX,HU,5005,11A -19-16OCT91

TM1360 (16OCT91) 50-05-4 55, 56 Series Tractors

010395

Page 79

Hydrostatic Transmission/Remove/Install Charge Pump

2. Drive pin out of front universal joint to remove shaft.

3. To install, align pin holes of drive shaft front U-joint and MFWD input shaft as you slide the shaft into position.

4. Fasten with spring pin removed earlier.

5. Fasten front cover in place with band clamps.

6. Fasten rear U-joint of drive shaft to transaxle output shaft.

7. Fasten rear cover in place with band clamps.

M37523 -UN-06SEP88

MX,HU,5005,12 -19-16OCT91

REMOVE AND INSTALL CHARGE PUMP

NOTE: Orientation of charge pump: Flat on charge pump

housing must be on right-hand side. If turned 180˚, pump will not function.

1. Remove two cap screws (A) to remove charge pump.

50 05 5

M43636 -UN-31AUG88

MX,HU,5005,13 -19-16OCT91

TM1360 (16OCT91) 50-05-5 55, 56 Series Tractors

010395

Page 80

Hydrostatic Transmission/Remove Hydrostatic Transmission

2. Remove pin (A). Inspect pin for damage or wear. Replace if necessary.

3. Inspect machined surface of transmission for severe scoring. If scoring is noted, replace transmission.

4. Clean and dry all parts. Machined surface of transmission must be clean.

5. Apply clean transmission oil on all internal parts.

6. Install pin (A). Apply petroleum jelly to pin and shaft to hold pin in place during installation of charge pump.

7. Be sure O-ring is in place on pump.

8. Torque cap screws (Step 1) to specification.

TORQUE SPECIFICATION

Charge Pump Cap Screws . . . . . . . . . . . . . . 37-50 N·m (27-37 lb-ft)

50 05

REMOVE HYDROSTATIC TRANSMISSION

1. Drain transaxle. Oil capacity is approximately 17 L (4.5 gal).

2. Remove the following:

M43637 -UN-19JAN90

MX,HU,5005,14 -19-16OCT91

• Drawbar

• Sheet Metal Panels (see procedures in this group)

• Transmission Drive Shaft (see procedures in this group)

• MFWD Drive Shaft (see procedures in this group).

MX,HU,5005,16 -19-16OCT91

TM1360 (16OCT91) 50-05-6 55, 56 Series Tractors

010395

M43506 -UN-31AUG88

Page 81

Hydrostatic Transmission/Remove Hydrostatic Transmission

3. Disconnect spring (A) from lever (B).

4. Remove bolt (C) to disconnect linkage from transmission (D).

A—Spring B—Transmission Neutral Return Lever C—Bolt D—Transmission

IMPORTANT: Close all openings with caps and plugs

to keep dirt out of the hydraulic system.

5. Disconnect fitting (A). Loosen clamp on other end and turn tube (B) to permit transmission removal.

6. Disconnect line (C).

M43639 -UN-31AUG88

MX,HU,5005,17 -19-16OCT91

7. Disconnect lines (D).

8. Disconnect wiring (E).

A—Fitting B—Suction Line C—Steering Line D—Oil Cooler Lines (2) E—Neutral Start Wire

50 05 7

M43640 -UN-31AUG88

MX,HU,5005,18 -19-16OCT91

TM1360 (16OCT91) 50-05-7 55, 56 Series Tractors

010395

Page 82

Hydrostatic Transmission/Remove Hydrostatic Transmission

9. Fasten a lifting eye to the transmission and hold transmission with an overhead hoist.

10. Remove two cap screws (A).

11. Move transmission forward so that output gear clears transaxle, then lower transmission to remove it.

M43641 -UN-31AUG88M43642 -UN-31AUG88

50 05

12. Remove cap screw and speed control lever (A).

13. Remove cap screw and neutral return lever (B).

14. Remove O-rings (C).

15. Remove three fittings (D).

A—Cap Screw/Speed Control Lever B—Cap Screw/Neutral Return Lever C—O-ring D—Fittings

16. If neutral start switch is being replaced, be sure to install spacer (A) between switch and speed control lever.

MX,HU,5005,19 -19-16OCT91

M43678 -UN-31AUG88

MX,HU,5005,20 -19-16OCT91

MX,HU,5005,21 -19-16OCT91

TM1360 (16OCT91) 50-05-8 55, 56 Series Tractors

010395

M43680 -UN-31AUG88

Page 83

Hydrostatic Transmission/Remove Hydrostatic Transmission

17. Inspect neutral return lever rollers (B). Replace them if they DO NOT turn freely.

18. Inspect bronze bushing in neutral return lever (D) for excessive wear on the inside diameter. If bushing is being replaced, be sure to align hole in bushing with grease fitting hole in lever. Ream bushing to 19.088 ±

0.025 mm (0.7515 ± 0.001 in.) diameter.

A—Lock nut B—Roller (2 used) C—Washer (2 used) D—Neutral Return Lever E—Thin Washer F—Short Cap Screw G—Long Cap Screw H—Eccentric Pivot I—Seal Cover (2 used) J—Felt Seal (2 used)

M43679 -UN-31AUG88

MX,HU,5005,22 -19-16OCT91

50 05 9

TM1360 (16OCT91) 50-05-9 55, 56 Series Tractors

010395

Page 84

Hydrostatic Transmission/Cross-Section View Hydrostatic Transmission

CROSS-SECTION VIEW—HYDROSTATIC TRANSMISSION

50 05 10

1—Needle Bearing 2—Seal 3—Filter 4—Pin (2 used) 5—Needle Bearing (2 Used) 6—Motor Valve Plate 7—Motor Cylinder Block

Assembly With Fixed Thrust Plate

8—Drain Plug 9—Bearing Retaining Pin 10—Ball Bearing (2 Used) 11—Late Model Motor Shaft

(Early Models Are Not

Threaded) 12—Collar 13—Pump Shaft

14—Seal Guide 15—Snap Ring 16—O-Ring 17—Ball Bearing 18—Thrust Plate 19—Variable Swash Plate 20—Pump Cylinder Block

Assembly (2 Used)

21—Pin (2 Used) 22—Pump Valve Plate 23—Center Section 24—O-Ring 25—Gerotor Charge

Pump 26—Gerotor Drive Pin 27—Gasket

M85125

50-05-10

Page 85

Hydrostatic Transmission/Remove Hydrostatic Transmission

DISASSEMBLE TRANSMISSION

1. Thoroughly clean outside surface of transmission using wire brush and solvent.

2. Install transmission on a bench fixture.

3. Remove and inspect charge pump (A). (See procedures previously in this section.)

4. Remove filter (B).

M43813

50 05

5. (Early Models) Rotate fixture 180°. Remove cap screw (A), and washer (B) to remove output shaft drive gear (C) (19 teeth).

IMPORTANT: Late model Hydrostatic

T ransmissions have cotter pin (F) and castle nut (D) assembly (Hydrostatic Driveshaft Kit AM118962 for positive gear retention) instead of cap screw (A) assembly.

5. (Late Models) Rotate fixture 180°. Remove cotter pin (F), castle nut (D), and washer (E) to remove output shaft drive gear (C) (19 teeth).

M43814

50-05-11

M85124

Page 86

Hydrostatic Transmission/Disassemble Transmission

IMPORTANT: Do not allow internal parts to fall when

removing center section.

6. Rotate fixture 180˚. Loosen six cap screws (DO NOT remove). Remove transmission from bench fixture.

7. Put transmission on its side on a work bench and remove six cap screws, center section and gasket (A).

M43815 -UN-31AUG88M43816 -UN-31AUG88

50 05 12

IMPORTANT: Do not nick or scratch lapped or

machined surfaces of the center section, valve plates or cylinder blocks.

Keep pump and motor components separate, they are not interchangeable.

8. Remove valve plates (A and B). If it is necessary to pry valve plates loose from center section, use a wooden dowel and pry only at dowel pin grooves.

If valve plates DO NOT come off with center section, remove valve plates from cylinder block assemblies.

It may be necessary to apply diesel fuel between valve plate and cylinder block to cut oil film.

MX,HU,5005,26 -19-16OCT91

MX,HU,5005,27 -19-16OCT91

TM1360 (16OCT91) 50-05-12 55, 56 Series Tractors

010395

M43817 -UN-31AUG88

Page 87

Hydrostatic Transmission/Disassemble Transmission

9. Inspect valve plates. Valve plates should be flat, free of all nicks, burrs, scratches, and erosion around the ports. The bronze metal should show no scoring, smearing, or be discolored.

NOTE: Scoring is indicated by fine scratches or grooves

cut into the plate. When these scratches can be detected by feel,

fingernail or lead pencil, the plate should be replaced.

10. Inspect both bearings in center section. Replace if necessary. Remove bearing using a 2-jaw slide hammer puller.

11. For disassembly of center section, see Cross-Section View—Center Section later in this section.

M43818 -UN-31AUG88

MX,HU,5005,28 -19-16OCT91

IMPORTANT: Do not nick or scratch lapped surface

of cylinder blocks.

Piston-to-bore relationship need not be maintained; keep pump and motor components separate, they are not interchangeable.

12. Remove motor and pump cylinder blocks.

13. Inspect cylinder block assemblies.

IMPORTANT: Do not interchange pistons between

motor and pump cylinder blocks. Pistons and cylinder blocks are matched.

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50 05

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Lift piston retainer and pistons from cylinder block. Check for free movement of pistons in cylinder bores.

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14. Remove and inspect all pistons. Check barrel (B) for scoring, discoloration, or any signs

of separation of slippers. Check slipper (A) for scoring, smearing, rolled edges and

a full 360˚ free rotation on barrel. Check lubrication hole (C) for blockage. Clean with

compressed air. If any component of the piston is damaged, the cylinder

block assembly must be replaced.

15. Remove and inspect both piston retainers. Check retainer for flatness, nicks, burrs, and

discoloration.

05 14

Check area around piston slippers (A) for scoring. If any part of the piston retainer is damaged, the cylinder

block assembly must be replaced.

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16. Inspect both cylinder blocks. Check ball guide area (A) for scoring, wear and damage. Check nine cylinder bores (B) for burrs and scoring. Check lapped surface (C) for wear and damage. Check spring assembly (D) for damage and free axle

movement. If any part of the cylinder block is damaged, the cylinder

block assembly must be replaced.

IMPORTANT: Do not scratch machined surfaces of

thrust plates or swashplates. Initial production transmission cases were machined for 1.02 mm (.040 in) larger motor thrust plates than pump thrust plates. A running change to equal-diameter thrust plates for both the motor and the pump has been made. Do not try to install the new (smaller diameter) thrust plates in earlier model transmission cases with the wider motor machined bore.

M36114 -UN-29AUG88M36115 -UN-29AUG88

50 05 15

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M43821 -UN-31AUG88

17. Remove pump and motor thrust plates using a brass O-ring pick.

Inspect thrust plates. Check plates for scoring and smeared bronze material.

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NOTE: Remove pin (B) using a #4-40 x 1 UNC-2B cap

screw (only on tractors through July, 1990) or a #8-32 x 1 UNC-2B cap screw (only on tractors after July, 1990).

18. Remove drain plug (A) and bearing retaining pin (B). (Keys 8 and 9 of Cross Section View shown earlier in this section.) Use a slide hammer puller on the head of the cap screw to remove retaining pin (B).

19. Remove motor shaft assembly (C).

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MX,HU,5005,36 -19-16OCT91

20. Inspect bearings, replace if necessary.

IMPORTANT: Be sure to hold shaft while removing

50 05

bearing.

21. Remove bearings (B) and collar (C) using a 1 in. driver disk (A), knife-edge puller, and a hydraulic press.

22. Remove snap ring (A), seal guide (B), O-ring (C), and pump shaft assembly (D).

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23. Inspect bearing, replace if necessary.

IMPORTANT: Be sure to hold shaft while removing

bearing.

24. Remove bearing using a 1 in. driver disk (A), knife-edge puller, and a hydraulic press.

25. Remove cap screws to remove end caps (A and B). Inspect bearings; if bearings are worn or damaged,

replace the end cap. Remove O-ring (C). Inspect control shaft seal, replace as required.

26. Remove swashplate (D).

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Hydrostatic Transmission/Cross-Section View—Center Section

CROSS-SECTION VIEW—CENTER SECTION

A—Oil Cooler Bypass Relief F—Main Relief and Inlet J—Charge Relief Valve O—Reverse Flow Check

Valve Check K—Shims (as required) Valve B—Plugs (4 used) G—Plug (2 used) L—Spring P—Oil Filter Bypass Valve C—Spring H—Spring (2 used) M—Valve (4 used) Q—Spring D—To Oil Cooler I—Relief Valve Assembly N—Spring R—Charge Pump Inlet E—From Oil Cooler

IMPORTANT: Return all shims, springs and valves

to their original port.

Remove charge relief valve (J); remove plug, shims (I) if equipped, spring, and valve. Remove the remaining valves as required. Inspect valves and seats for damage. Valves must slide freely in bore.

50 05 18

Apply clean transmission oil on all internal parts when assembling relief valves and check valves. After assembly and installation, check for correct operation. (See Section 250.)

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Hydrostatic Transmission/Cross-Section View—Center Section

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50 05 19

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Hydrostatic Transmission/Assemble Transmission

ASSEMBLE TRANSMISSION

1. Clean and dry all parts.

2. Use new O-rings, seals, and gaskets when assembling the transmission.

3. Before assembly, apply clean transmission oil on all internal parts.

4. Install swashplate (B).

5. Install seal (D) with spring side toward the inside of transmission.

IMPORTANT: Do not damage seal when installing

end cap over the control shaft. Replace end cap (A) when plastic wears through into the bronze backing.

6. Carefully install end cap (C) over control shaft. Install cap screws.

M43827 -UN-31AUG88

A—End Cap B—Swashplate C—End Cap D—Seal

7. Install end cap (A) and cap screws. Tighten all cap

screws to 8-9 N·m (72-84 lb-in).

05 20

8. Use a 1 in. driver disk (A), knife-edge puller, and a press to push pump shaft into bearing until it contacts the shaft shoulder.

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9. Install pump shaft assembly (D), O-ring (C), seal guide (B), and snap ring (A).

A—Snap Ring B—Seal Guide C—O-Ring D—Pump Shaft Assembly

10. Use a 1 in. driver disk (A), knife-edge puller, and a press to push motor shaft into bearings (B) and collar (C) until they are on the shaft shoulder.

M43824 -UN-29MAY91

MX,HU,5005,44 -19-16OCT91

11. Install motor shaft assembly (C), retaining pin (B), and set screw (A) and tighten.

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50 05

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Hydrostatic Transmission/Assemble Transmission

IMPORTANT: Do not nick or scratch lapped surface

of cylinder blocks. Piston-to-bore relationship need not be maintained.

Do not scratch machined surfaces of thrust plates or swashplates. Initial production transmission cases were machined for 1.02 mm (.040 in) larger motor thrust plates than pump thrust plates. A running change to equal-diameter thrust plates for both the motor and the pump has been made. Do not try to install the new (smaller diameter) motor thrust plates in earlier model transmission cases with the wider motor machined bore.

12. Install pump and motor thrust plates.

M43821 -UN-31AUG88

50 05 22

13. Install pistons and piston retainer. Lift piston retainer and piston from cylinder block. Check

for free movement of pistons in cylinder block before installing in housing.

14. Install pump and motor cylinder blocks.

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Hydrostatic Transmission/Assemble Transmission

IMPORTANT: Do not nick or scratch lapped or

machined surfaces of the center section, valve plates or cylinder block.

Keep pump and motor components separate. They are not interchangeable.

15. Use a 1-5/16 in. driver disk (A) to install two needle bearings (B). Drive bearings into housing until they are approximately 3 mm (7/64 in.) above the surface of the housing.

16. For assembly of center section, see Cross-Section View—Center Section shown earlier in this section.

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MX,HU,5005,50 -19-16OCT91

17. Put clean hydrostatic oil on valve plates and housing surface.

IMPORTANT: PUMP VALVE PLATE has TWO slotted

ports (D).

MOTOR VALVE PLATE has FOUR slotted ports (C).

18. Install pump valve plate (B) and motor valve plate (A) over the protruding bearings and align slots on back sides of plates with pins (E) in housing.

A—Motor Valve Plate B—Pump Valve Plate C—Slotted Ports (Motor) D—Slotted Ports (Pump) E—Center Section Pins

50 05 23

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IMPORTANT: Use extreme care when assembling the

center section, valve plates and cylinder block to avoid dropping, nicking, or scratching lapped surfaces.

19. Install center section and gasket (A) on housing and install six cap screws. Tighten cap screws evenly in a crossing pattern until they are snug—DO NOT torque them at this time.

NOTE: Center section will seem springy, this is because

the springs inside the cylinder blocks are being compressed.

20. Install transmission upright in bench fixture.

IMPORTANT: Check for proper internal assembly by

slowly rotating pump, motor and control shaft while tightening cap screws.

21. Tighten cap screws to 44-55 N·m (33-41 lb-ft), also in a crossing pattern.

M43816 -UN-31AUG88M43842 -UN-31AUG88

50 05 24

22. Install new filter (B).

23. Install charge pump (A). (See Remove and Install Charge Pump earlier in this section.)

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Hydrostatic Transmission/Install Transmission

24. Turn transmission and bench fixture over to install output drive gear (C) (19 teeth) on output shaft.

NOTE: If Hydrostatic Driveshaft Kit AM118962 (for

positive gear retention) is used go to step 27.

25. (Early Models) Install washer (B) and cap screw

(A). Use John Deere LOCTITE

Thread Lock and

Sealer on cap screw threads.

26. Tighten cap screw to 54 N•m (40 lb-ft).

27. (Late Models) Install washer (E) and castle nut (D). Tighten castle nut to 109 N•m (80 lb-ft). If needed, continue tightening castle nut until slot in castle nut lines up with hole in shaft.

IMPORTANT: If the cotter pin is installed as

described it will not contact the transmission case.

28. Install cotter pin (F). Seat head of cotter pin down in slot of castle nut by tapping with hammer.

29. Bend both ends of cotter pin over end of shaft.

30. Tap ends of cotter pin down tight against the end of the shaft. (Cotter pin should have minimal movement, it should be tight in shaft and castle nut).

M43814

50 05

M85124

INSTALL TRANSMISSION

1. Assemble neutral return lever parts (A thru J).

A—Lock Nut B—Roller (2 used) C—Washer (2 used) D—Neutral Return Lever E—Thin Washer

2. Install neutral return lever. Fasten it with cap screw (B).

3. Install speed control lever. Fasten it with cap screw (A).

4. Install new O-rings (C). Apply petroleum jelly to hold O-rings in place while installing transmission.

5. Install three fittings (D).

TORQUE SPECIFICATIONS

—

Flow Divider Fitting Swivel Elbow Line & Nut—27 N•m (20 lb-ft) Union Connectors Flow Divider—47 N•m (35 lb-ft) PTO Valve Fitting—49 N•m (36 lb-ft) Charge Inlet Line Fitting—95—230 N•m (70—170 lb-ft)

34 N•m (25 lb-ft)

F—Short Cap Screw G—Long Cap Screw H—Eccentric Pivot I—Seal Cover (2 used) J—Felt Seal (2 used)

M43678

M43679

A—Speed Control Lever Cap Screw B—Neutral Return Lever Cap Screw C—O-Rings D—Fitting

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Hydrostatic Transmission/Install Transmission

6. Fasten a lifting eye to the transmission and hoist it up through the frame. Be sure control levers are positioned as shown.

7. Be sure coupler (A) is in place in transaxle.

8. Turn axles or transmission input shaft to align splines and gears as the transmission is moved into place. Be careful not to damage the O-ring surfaces.

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50 05 26

9. Install two cap screws and thick washers (A). Tighten cap screws to 142 N·m (105 lb-ft).

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