Part of the John Deere Repair Manuals.
A hydrostatic drive that whines under load or a loader valve that bleeds off lift pressure will park a 70 in a hurry, and this John Deere 70 technical manual PDF, factory publication TM1072 for the 70 Skid-Steer Loader, gives you 174 pages of the data that fixes it. Wiring diagrams trace the charging, ignition and starting circuits wire by wire, while hydraulic schematics follow oil from the pump through the control valve to the boom and bucket cylinders. Diagnostic charts open the engine, fuel, electrical and hydraulic sections, and the power train chapter carries the hydrostatic pumps, motor, axles and center reduction gear from teardown to reassembly. Bench your starter at 11.5 volts no load and look for 3700 rpm minimum, then set the piston pump tie bolts at 25 to 28 ft-lbs. Guess a torque and you crack a pump housing. Bookmarked and text searchable, this download lives wherever the machine does.
What's Inside This John Deere 70, 70 Skid-Steer Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 9-16 | Specifications, Predelivery, Delivery, And After-Sales Services, Tune-Up and Adjustment |
| Engine | 17-58 | Diagnosing Engine Malfunctions, Basic Engine, Repair, Assembly, And Adjustments of Engine |
| Fuel System | 59-70 | Diagnosing Fuel System Malfunctions, Carburetor, Fuel Filter and Fuel Pump, Specifications and Special Tools |
| Electrical System | 71-96 | Diagnosing Electrical System, Battery and Wiring Diagrams, Charging System, Ignition System, Starting Motor, Specifications and Special Tools |
| Power Train | 97-134 | Diagnosing Hydrostatic Drive System, Operation of Hydrostatic Pumps, Hydrostatic Pumps, Hydrostatic Motor, Axle Assemblies, Center Reduction Gear, Specifications and Special Tools |
| Steering and Brakes | 135-144 | Steering, Brakes, Specifications and Special Tools |
| Hydraulic System | 145-174 | Diagnosing Hydraulic System, Hydraulic Pump, Hydraulic Control Valve, Hydraulic Cylinders, Hydraulic Oil Filter, Specifications and Special Tools |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Wheel nuts for tightness | 90 ft-lbs | p. 11 |
| Wheel nuts and studs | 90 ft-lbs | p. 12 |
| No-Load Test Voltage | 11.5 volts | p. 87 |
| No-Load Test Speed | 3700 rpm minimum | p. 87 |
| Solenoid Switch Hold-In Winding Current Consumption | 18.0-20.0 Amps at 10 Volts | p. 95 |
| Solenoid Switch Pull-In Winding Current Consumption | 52.4-57.8 Amps at 10 Volts | p. 95 |
| Relief Poppet Pressure | 1500 psi | p. 161 |
| Engine Flywheel Horsepower | 23.5 hp | p. 10 |
| Engine Maximum Torque | 40 ft-lbs | p. 10 |
| Fuel Tank Capacity | 11 gal. | p. 10 |
| Hydraulic and Hydrostatic System Capacity | 15 gal. | p. 10 |
| Tire Pressure | 30 to 32 psi | p. 11 |
John Deere 70, 70 Skid-Steer Common Problems This Manual Covers
John Deere 70 skid-steer cranks slowly or will not start, clicks at the key in cold weather
Load test the battery and clean both terminals before condemning the starter. Bench test the starting motor against the no-load specs on page 87: minimum 3700 rpm at 11.5 volts, drawing 60 amps maximum. If the starter passes, work through the engine troubleshooting steps beginning on page 18 to chase ignition and fuel.
Manual Section: Electrical System p. 71Boom and bucket lift slowly or will not lift at all with engine at full throttle
Check the reservoir first; the combined hydraulic and hydrostatic system holds 15 gallons. Tee a pressure gauge into the loader circuit and stall a bucket cylinder against the relief. You want 1500 psi, spec on page 163. If pressure is low, test pump output; a healthy pump delivers 7 gpm per page 149.
Manual Section: Diagnosing Hydraulic System Malfunctions p. 145One side quits pulling under load while the other side drives normally
Swap the pump control linkages side to side to rule out a binding rod. Follow the hydrostatic circuit on the schematic, page 101, to isolate the weak pump or motor. After any pump teardown, torque the tie bolts to 25 to 28 ft-lbs and the connecting bolts to 33 to 37 ft-lbs, specs on page 131.
Manual Section: Power Train p. 97Forward and reverse control levers grind, bind, or stick halfway through the stroke
Disconnect the control rods and work each ball joint by hand; rust seizes them on machines that sit outside. Soak stuck joints with penetrating oil and replace any that stay tight. While the linkage is apart, check the piston pump tie bolts for 25 to 28 ft-lbs torque, the tune-up spec on page 14.
Manual Section: Power Train p. 97Engine bogs and loses power when steering or lifting a loaded bucket
Replace the fuel filter and open the tank cap; if power comes back, clean the plugged breather. The tank only holds 11 gallons, so keep it above half to avoid pickup starvation on slopes. Rule out a stuck relief valve next; it should hold 1500 psi, spec on page 163, before blaming the 23.5 hp engine.
Manual Section: Fuel System p. 59Frequently Asked Questions
What are the torque specifications for the John Deere 70?
The manual provides various torque specifications depending on the component. For example, the cylinder head bolts should be tightened to 17 to 19 ft-lbs, the connecting rod bolts to 27 to 29 ft-lbs, and the hydrostatic pump tie bolts to 25 to 28 ft-lbs. p. 57
What are the replacement specifications for the hydraulic oil filter on a John Deere 70, 70 Skid-Steer?
The hydraulic oil filter should be replaced when the vacuum gauge needle enters the red zone after the unit has been allowed to warm up. When installing a new filter, apply a thin film of oil to the sealing ring and spin the element down by hand until it touches the mounting pad, then turn an additional 1-1/2 turns. p. 169
What is the engine crankcase oil capacity for the John Deere 70?
The engine crankcase capacity for the John Deere 70 is 4 U.S. quarts. p. 15
What is the correct intake and exhaust valve clearance for a John Deere 70 with serial number 01072 and below?
For loaders with serial number 01072 and below, the intake valve clearance is .003 inches and the exhaust valve clearance is .010 inches. p. 52
How is this John Deere 70 Technical Manual delivered?
You get a 174-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Can I print specific sections of this John Deere 70 Technical Manual?
Printing is allowed without restriction. Pull the pages you need for the job and bin them when they get greasy.
Does this John Deere 70 Technical Manual cover the hydraulic system?
Yes. The Technical Manual includes a hydraulic diagram showing how the main circuit runs. Page 101 carries one of them.
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