TM1470 - JOHN DEERE 670, 770, 790, 870, 970, 1070 COMPACT UTILITY TRACTORS

670, 770, 790, 870, 970, 1070 Compact Utility Tractors

TECHNICAL MANUAL John Deere Worldwide Commercial and Consumer Equipment Division TM1470 (15MAR99) Replaces TM1470 (15MAR94) Litho in U.S.A

Con ten ts SECTION 10—GENERAL INFORMATION Group 05—Safety Group 10—General Specifications Group 15—Repair Specifications Group 20—Fuel and Lubricants Group 25—Serial Number Locations

SECTION 60—STEERING AND BRAKE REPAIR Group 05—Manual Steering Group 10—Power Steering Group 15—Brake Repair—670/770/790 Group 20—Brake Repair—870/970/1070 SECTION 70—HYDRAULIC REPAIR Group 05—Hydraulic Pump and Filter Group 10—Rockshaft—670/770/790 Group 11—Rockshaft—870/970/1070 Group 15—Selective Control Valve Group 20—Rear Auxiliary Hydraulic Lines

SECTION20—ENGINEREPAIR Group 05—670/770 Group 06—870/970/1070 Group 07—790 Group 10—Cooling System Group 15—Throttle and Governor Control Linkage Group 20—Fuel System

SECTION80—MISCELLANEOUSREPAIR Group 05—Wheels Group 10—Front Axle Group 15—Hood Group 20—3-Point Hitch Group 25—Seat and Support Group 30—Roll-Gard Group 35—Mower Spindles Group 40—Mower Gearbox

SECTION 40—ELECTRICAL SYSTEM Group 05—Alternator Group 10—Starter Group 15—Sender, Switches and Gauges SECTION 50—POWER TRAIN REPAIR—670/770/790 Group 05—Clutch Housing Group 06—Single Stage Clutch Group 07—Dual Stage Clutch Group 10—Transmission Group 15—Rear PTO Drive Shaft Group 20—Differential Group 25—Final Drive Group 30—Mechanical Front Wheel Drive Group 35—Throttle and Governor Control Linkage

SECTION 210—OPERATIONAL CHECKOUT PROCEDURE AND SPECIFICATIONS Group 05—Test and Adjustment Specifications Group 10—Operational Checkout Procedures SECTION 220—ENGINE OPERATION, TESTS, AND AD JUS TME NT S Group 05—Component Locations Group 10—Theory of Operation Group 15—Engine System Diagnosis

Section 55—POWER TRAIN REPAIR —870/970/1070 Group 05—Clutch Housing Group 06—Dual Stage Clutch Group 10—Transmission Group 15—Rear PTO Drive Shaft Group 20—Differential Group 25—Final Drive Group 30—Mechanical Front Wheel Drive—870 Group 35—Mechanical Front Wheel Drive —9 70/ 1070 Group 40—Mid Mount PTO

SECTION 240—ELECTRICAL SYSTEM OPERATION AND TESTS Group 05—Component Location Group 10—Theory of Operation Group 15—Diagnosis and Test Group 20—Schematic Continued on next page

TM1470-19-15JAN99

COPYRIGHT©1999 DEERE&COMPANY Moline, Illinois All rights reserved A John Deere ILLUSTRUCTION™ Manual

i

SECTION 250—POWER TRAIN—670/770/790 Group 05—Component Location Group 10—Theory of Operation Group 15—Diagnosis and Test SECTION 255—POWER TRAIN—870/970/1070 Group 05—Component Location Group 10—Theory of Operation Group 15—Diagnosis and Test SECTION 260—STEERING AND BRAKES Group 05—Component Location Group 10—Theory of Operation Group 15—Diagnosis and Test SECTION 270—HYDRAULIC SYSTEM Group 05—Component Location Group 10—Theory of Operation Group 15—Diagnosis and Test Group 20—Schematic

ii

Section 10

GENERAL INFORMATION Contents Page

Group 05—Safety ....................10-05-1 Group 10—General Specifications Machine Specifications 670/770/790........................10-10-1 870/970/1070.......................10-10-4 Group 15—Repair Specifications Repair Specifications . . . . . . . . . . . . . . . . . .10-15-1 Metric Series Torque Chart . . . . . . . . . . . .10-15-10 Inch Series Torque Chart . . . . . . . . . . . . . .10-1511 Group 20—Fuel and Lubricants Fuel Specifications. . . . . . . . . . . . . . . . . . . .10-201 FuelStorage.........................10-20-1 FillingtheFuelTank...................10-20-2 DieselEngineOil.....................10-20-3 EngineCoolant.......................10-20-4 AntiChatterTransmission/HydraulicOil....10-20-4 GearOil............................10-20-5 Extreme Pressure Grease . . . . . . . . . . . . . .10-20-5 Alternative Lubricants . . . . . . . . . . . . . . . . .10-206 Lubricant Storage. . . . . . . . . . . . . . . . . . . . .1020-6 Group 25—Serial Number Locations . . . .10-25-1

10-1

For the full PDF version of this manual, Please click on the above download PDF button.

Group 10

General Specifications MACHINE SPECIFICATIONS—670, 770 AND 790 670

770

790

ENGINE

Make Yanmar Yanmar Yanmar Type Diesel Diesel Diesel Model 3TNA72-UJX 3TN82-RJX 3TNE84 Horsepower(Net) 13.8kW(18.5hp) 17.2kW(24hp) 19.7kW(27hp) PTOHorsepower 11.9kW(16hp) 14.9kW(20hp) 18.6kW(25hp) RatedEngineSpeed2850rpm 2600rpm 2600rpm OperatingRange 800—3025rpm 800—2775rpm 925—2810rpm NumberofCylinders3 3 3 Displacement 879cm³(53.6cu.in.) 1362cm³(83.1cu.in.) 1496cm³(91.3cu.in.)

BoreandStroke 72x72mm(2.83x2.83in.)82x86mm(3.22x3.39in.)82x86mm(3.22x3.39in.)

CompressionRatio22.3:1 18.1:1 18.0:1 FastIdle 3000—3050rpm 3000—3050rpm 2920±25rpm SlowIdle 900—950rpm 900—950rpm 925rpm StartAid GlowPlug AirHeater AirHeater FiringOrder 1-3-2 1-3-2 1-3-2 Timing 16°BTDC 16°BTDC 14°+/-1°BTDC Lubrication Pressurized Pressurized Pressurized CoolingSystem WaterPump WaterPump WaterPump AirCleaner DryElement DryElement DryElement EngineShutoff KeySwitch KeySwitch KeySwitch ELECTRICAL SYSTEM Type 12Volt 12Volt 12Volt BatterySize 420ColdCrankingampsat420ColdCrankingampsat500ColdCrankingampsat -18°C -18°C -18°C 20Amp 20Amp 20Amp Alt er n ator FUEL SYSTEM Type Injection Pump Type Fuel Consumption at 75% load (Mowing)

IndirectInjection DirectInjection DirectInjection In-Line with Electric Shutoff In-Line with Electric Shutoff In-Line with Electric Shutoff 0.9gal/hr 1.0gal/hr 1.3gal/hr

DRIVE TRAIN TransmissionType Number of Speeds Travel Speeds at Full Engine RPM Forward Gears 1st 2nd 3rd 4th 5th 6th 7th 8th

Sliding Gear 8 Forward, 2 Reverse Equipped with 9.5-16 R-1 tires

Sliding Gear Sliding Gear 8 Forward, 2 Reverse 8 Forward, 2 Reverse Equipped with 12.4-16 R-1 Equipped with 12.4-16 R-1 tires tires

1.1 km/h (0.7 mph)

1.3 km/h (0.8 mph)

1.2 km/h (0.9 mph)

1.6 km/h (1.0 mph) 2.2 km/h (1.4 mph) 3.9 km/h (2.4 mph) 4.9 km/h (3.0 mph) 6.8 km/h (4.2 mph) 9.6 km/h (5.9 mph) 16.6 km/h (10.3 mph)

1.8 km/h (1.1 mph) 2.5 km/h (1.6 mph) 4.4 km/h (2.7 mph) 5.6 km/h (3.5 mph) 7.7 km/h (4.8 mph) 11.1 km/h (6.8 mph) 19.1 km/h (11.8 mph)

1.6 km/h (1.0 mph) 2.3 km/h (1.4 mph) 4.0 km/h (2.5 mph) 5.1 km/h (3.2 mph) 7.0 km/h (4.4 mph) 10.0 km/h (6.2 mph) 17.3 km/h (10.8 mph)

10-10-1

REVERSE GEARS 1st Gear 2nd Gear Final Drive Brakes Steering (Base) (Opt ion al ) Clutch (Base) (Opt ion al ) HYDRAULIC SYSTEM Type of System Working Pressure Pump (Type) Pump Capacity

670

770

790

1.1 km/hr (0.7 mph) 4.8 km/hr (3.0 mph) Spur Gear Dry Shoe Manual Power

1.3 km/hr (0.8 mph) 5.4 km/hr (3.4 mph) Spur Gear Dry Shoe Manual Power

Single Stage Dry

Single Stage Dry

1.2 km/hr (0.9 mph) 4.9 km/hr (3.1 mph) Spur Gear Dry Shoe Manual Power—2WD Power—4WD Single Stage Dry—2WD Dual Stage Dry—4WD

Dual Stage Dry

Dual Stage Dry

Open Center 14135 kPa (141.3 bar) (2050 psi) Dual Gear 20.9 L/min (5.5 gpm)

Open Center 14135 kPa (141.3 bar) (2050 psi) Dual Gear 21.1 L/min (5.6 gpm)

Open Center 14135 kPa (141.3 bar) (2050 psi) Dual Gear 21.1 L/min (5.6 gpm) Power Steering— 16.3 L/min (4.3 gpm)

370 kg (815 lbs) Position

370 kg (815 lbs)

Transmission Drive Continuous Live

Transmission Drive Continuous Live

2076 rpm 540 rpm Mid PTO only

2076 rpm 540 rpm Mid PTO only

24.0 L (6.3 U.S.gal) 4.8 L (1.25 U.S.gal) 4.0 L (4.2 U.S. qt)

24.0 L (6.3 U.S.gal) 4.8 L (1.25 U.S.gal) 4.1 L (4.3 U.S. qt)

15 L (4.0 U.S. gal)

15 L (4.0 U.S. gal)

2.3 L (2.25 U.S. qt)

2.3 L (2.25 U.S. qt)

6.50-10 12.40-16

6. 00 -1 2 12.40-16

Hitch Lift Capacity at 24 In. BehindLiftLinks 358kg(790lbs) LiftControlType Position

Position

PTO Type(Base) TransmissionDrive (Optional) ContinuousLive Speed (PTO rpm at rated engine speed) MidPTO 2275rpm RearPTO 594rpm Brake MidPTOonly CAPACITIES FuelTank 24.0L(6.3U.S.gal) CoolingSystem 3.8L(4.0U.S.qt) Engine Crankcase (w/fil- 2.6 L (2.7 U.S. qt) ter) HydraulicSystem 15L(4.0U.S.gal) Transmission FrontAxleGearCase 2.3L(2.25U.S.qt) (4WD) TIRES Standard Equipment Front 5.00-12 Rear 9.50-16

10-10-2

For the full PDF version of this manual, Please click on the above download PDF button.