Part of the John Deere Repair Manuals.
This is the complete John Deere factory technical manual (TM1470) for the 670, 770, 790, 870, 970 and 1070 compact utility tractors. Across 1,020 pages it covers every major system on all six models: engine removal and rebuild split by displacement group, power train and drivetrain repair split between the 670/770/790 and 870/970/1070 families, hydraulic pump and rockshaft service, full electrical system with schematics, steering and brake repair, and a dedicated operational checkout and specifications section. It is the same manual a John Deere dealer technician works from, with the torque values, clearances and test pressures called out so a repair is done to spec the first time.
What's Inside This John Deere 670-1070 Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | Safety, General Specifications, Repair Specifications, Fuel and Lubricants, Serial Number Locations | |
| Engine Repair | 670/770 Engine, 870/970/1070 Engine, 790 Engine, Cooling System, Throttle and Governor Control Linkage, Fuel System | |
| Electrical System | Alternator, Starter, Sender, Switches and Gauges | |
| Power Train Repair - 670/770/790 | Clutch Housing, Single Stage Clutch, Dual Stage Clutch, Transmission, Rear PTO Drive Shaft, Differential, Final Drive, Mechanical Front Wheel Drive | |
| Power Train Repair - 870/970/1070 | Clutch Housing, Dual Stage Clutch, Transmission, Rear PTO Drive Shaft, Differential, Final Drive, Mechanical Front Wheel Drive, Mid Mount PTO | |
| Steering and Brake Repair | Manual Steering, Power Steering, Brake Repair - 670/770/790, Brake Repair - 870/970/1070 | |
| Hydraulic Repair | Hydraulic Pump and Filter, Rockshaft - 670/770/790, Rockshaft - 870/970/1070, Selective Control Valve, Rear Auxiliary Hydraulic Lines | |
| Miscellaneous Repair | Wheels, Front Axle, Hood, 3-Point Hitch, Seat and Support, Roll-Gard, Mower Spindles, Mower Gearbox | |
| Operational Checkout and Specifications | Test and Adjustment Specifications, Operational Checkout Procedures | |
| Engine Operation, Tests, and Adjustments | Component Locations, Theory of Operation, Engine System Diagnosis | |
| Electrical System Operation and Tests | Component Location, Theory of Operation, Diagnosis and Test, Schematic | |
| Power Train - 670/770/790 Operation and Tests | Component Location, Theory of Operation, Diagnosis and Test | |
| Power Train - 870/970/1070 Operation and Tests | Component Location, Theory of Operation, Diagnosis and Test | |
| Steering and Brakes Operation and Tests | Component Location, Theory of Operation, Diagnosis and Test | |
| Hydraulic System Operation and Tests | Component Location, Theory of Operation, Diagnosis and Test, Schematic |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 870 | ||
| Rated Power | 28 Hp | |
| 970 | ||
| Rated Power | 33 Hp | |
| 1070 | ||
| Rated Power | 38.5 Hp | |
| Transmission Type | Synchromesh, Three Range | |
| 870, 970 | ||
| Transmission Type | Collar Shift, Three Range | |
| Transmission Speeds | Nine speeds forward, two reverse | |
John Deere 670-1070 Common Problems This Manual Covers
Hydraulics are weak - loader or 3-point hitch barely lifts under load on 670/770 models
This typically means a worn hydraulic pump or leaking internal seals letting pressure bleed off. The Hydraulic Repair section covers removing and bench-testing the pump, inspecting the rockshaft seals on 670/770/790, and measuring system relief pressure. Confirm the hydraulic filter is current before pulling the pump, as a blocked filter cuts flow before the pump itself fails.
Manual Section: Hydraulic RepairClutch slips under load or drags and will not fully release on 870/970.
The most common cause is clutch adjustment drift rather than worn plates. The Power Train Repair - 870/970/1070 section details the dual stage clutch removal, plate inspection and free-play adjustment procedure. Check both the clutch pedal free-play and the internal clutch release bearing travel against the factory specifications before replacing any parts.
Manual Section: Power Train Repair - 870/970/1070Right rear brake is sticky or grabs unevenly, making turns and loader work unpredictable
Sticky right rear brakes on these compact tractors are caused by a lack of lubrication at the brake mechanism. The Steering and Brake Repair section covers the brake disassembly and lube points for both the 670/770/790 and 870/970/1070 groups. Service the brake lube fittings on the maintenance schedule and verify brake adjustment with the pedal free-play spec to restore even engagement.
Manual Section: Steering and Brake RepairNo dash lights or headlights, or intermittent electrical failure at the instrument panel
The most frequent cause is a blown 5-amp fuse at the panel near the left knee, or a loose wire connection at the fuse box. The Electrical System section covers fuse locations, harness connector checks, and the full diagnostic and test procedure. Check the fuse first, then trace the circuit with the wiring schematic in the Electrical System Operation and Tests section to find any corroded or loose connector before replacing components.
Manual Section: Electrical SystemFrequently Asked Questions
What are the rated power outputs for each model covered by TM1470?
The 870 is rated at 28 Hp, the 970 at 33 Hp, and the 1070 at 38.5 Hp. The smaller 670, 770 and 790 models have lower outputs documented in the General Information specifications section. Each model's engine repair and adjustment procedures are covered separately in the Engine Repair section.
Why are the hydraulics weak on a John Deere 670 or 770 compact tractor?
Weak hydraulics are one of the most common 670 complaints and usually point to a worn hydraulic pump or internal seal leakage. The Hydraulic Repair section covers removing and testing the hydraulic pump, checking the rockshaft, and measuring system pressure so you can tell whether the pump needs replacement or the seals can be rebuilt.
How do I adjust the clutch on a John Deere 870 or 970 that slips or drags?
The Power Train Repair - 870/970/1070 section covers the dual stage clutch in detail, including the adjustment procedure and clutch plate inspection. An out-of-adjustment clutch is the most common cause of slipping under load or dragging on engagement, and the factory specs give the exact free-play clearances to restore it.
What transmission type does the 1070 compact utility tractor use?
The 1070 uses a Synchromesh, Three Range transmission, while the 870 and 970 use a Collar Shift, Three Range unit giving nine forward speeds and two reverse. The Power Train - 870/970/1070 sections cover diagnosis, component location and removal procedures for both transmission types.
Does TM1470 cover the electrical system and wiring for all six models?
Yes. The Electrical System section covers the alternator, starter, sender, switches and gauges, and the Electrical System Operation and Tests section includes schematics and diagnostic procedures. The manual covers all six models, and the wiring information is specific enough to trace intermittent faults such as a blown 5-amp panel fuse that kills dash lights and headlights.
What do I get after purchasing this John Deere 670, 770, 790, 870, 970, 1070?
Instant PDF download (50 MB). You get the full 1020-page searchable Repair immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Am I able to print pages from this John Deere 670, 770, 790, 870, 970, 1070?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
