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Part of the John Deere Repair Manuals.
This 36-page John Deere 70 Service Manual also covers the 60, giving you one PDF for both Lawn Tractor models instead of hunting down two separate books. Open it up and you get full wiring diagrams for tracing charge circuit faults, a troubleshooting section for hard starting, backfiring, and loss of power, plus torque specs and step-by-step procedures for engine removal, transaxle service, and PTO clutch adjustment. You also get the steering gear, carburetor, and belt replacement procedures laid out in the same detail. Torque the cylinder head bolts to 140-200 in. lbs. and top off the crankcase at 1-1/2 U.S. pints of AM 30730 summer oil before you fire it up. No more guessing why the charging circuit won't hold a charge. Bookmarked and searchable; jump straight to the section you need and get back to the shop.
What's Inside This John Deere 70 Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 3-5 | Introduction, Specifications (Wheel Tread, Tire Sizes, Tire Inflation, Dimensions, Bare Weight), Equipment, Predelivery, Customer Delivery |
| Engine | 6-12 | Engine Specifications, Service Tools, Torque Cylinder Head Bolts, Cleaning Shrouds and Fins, Engine Removal, Rubber Engine Mounts, Throttle Cable Installation, Reinstall PTO Clutch |
| Fuel System | 13-14 | Specifications (Fuel System, Air Cleaner), Carburetor, Carburetor Service, Fuel Tank and Strainer |
| Electrical | 15-26 | Specifications, Electrical System Service, Where Do We Begin, Charge Circuit, Battery Replacement and Connections, Operating with Manual Starter, Checking Output Amperage |
| Power Train | 27-29 | Specifications (Brakes, Clutch, Transmission, Travel Speeds), Replacing Primary Belt, Replacing Secondary Belt, Transaxle Removal and Replacement, Wheel Removal |
| Miscellaneous | 30 | Steering Gear Adjustment, Finding Center of Steering Range, Steering Stud, Steering Column Removal Sequence, PTO Clutch (Repacking Clutch Bearings), Power Take-Off Clutch |
| Attachments | 31-36 | Rotary Mower (to Level the Mower), Rotary Mower Draft Arm Adjustment, Other Attachments |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Crankcase Capacity | 1-1/2 U.S. Pints | p. 6 |
| Type of Crankcase Lubricant (Summer) | AM 30730 Summer | p. 6 |
| Engine Horsepower | 7 HP @ 3600 rpm | p. 6 |
| Engine Crankcase Capacity | 1-1/2 U.S. Pints | p. 6 |
| Cylinder Head Bolts Torque | 140-200 in. lbs. | p. 7 |
| Fuel Tank Capacity | 1-1/4 U.S. Gallons | p. 13 |
| Spark Plug Gap | 0.030 in. | p. 15 |
| Breaker Point Gap | 0.020 in. | p. 15 |
| Charge Circuit Output Amperage | 2-4 Amps DC | p. 18 |
| Transmission Capacity | 3 U.S. Pints | p. 27 |
| Steering Gear Jam Nut Torque | 40 ft. lbs. | p. 31 |
| PTO Clutch Rod Deflection | 1/2-inch | p. 33 |
John Deere 70 Common Problems This Manual Covers
John Deere 70 piston seized after severe crankcase oil leakage, engine won't turn over
Drain the crankcase and find the source of the oil loss before attempting a restart. The 7 HP engine holds 1-1/2 U.S. pints of oil per page 6 specs; refill with AM 30730 for summer or AM 30710 for winter service. Pull the head and inspect the piston and cylinder bore for scoring; if it's seized, plan on a full engine overhaul rather than forcing it free.
Manual Section: Engine p. 6PTO clutch and brake cam shows scoring and cracks, engagement slips under load
Pull the PTO clutch cover and inspect the cam, housing, and plug for scoring or hairline cracks; replace any worn parts before reassembly. Set the PTO clutch brake clearance to 1/16-inch as specified on page 34. A scored cam or cracked housing won't hold adjustment, and the mower blades will keep spinning after you disengage the lever.
Manual Section: PTO Clutch Brake Adjustment p. 34Drive belt keeps jumping off the rear sheaves and squealing under load
Inspect the rear sheaves, idler arm, and belt guides for wear or misalignment, and replace any broken idler springs before reinstalling the belt. Follow the secondary belt adjustment procedure on page 28 to get routing and tension correct. While the transaxle is exposed for sheave work, top off gear oil to the 3 U.S. pint capacity listed on page 27 before closing it up.
Manual Section: Power Train - Secondary Belt Adjustment p. 28Engine cranks but will not start, no spark visible at the plug
Pull the spark plug and check the gap; it should measure 0.030 in. per the specs on page 15. If spark is weak or absent, check the breaker points for a 0.020 in. gap and inspect for pitting or a failing condenser using the ignition system tests on pages 21 and 22. Replace the plug if the electrode is fouled or worn round.
Manual Section: Ignition System p. 21Steering wheel has excessive backlash and feels loose from side to side
Loosen the adjusting plug jam nut, turn the plug in to remove end play, then torque the jam nut to 40 ft. lbs. as specified on page 31. Use the steering gear adjustment procedure on page 30 to find the center of the steering range before locking it down, or the play will come back after a few hours of mowing.
Manual Section: Steering Gear Adjustment p. 31Frequently Asked Questions
How to reset John Deere 70 idle hesitation?
To adjust for idle hesitation, turn the idle adjusting screw clockwise until closed (finger tight), then open one and one-half turns. Final idle adjustment should be made at an engine speed of 1200 to 1700 rpm. p. 13
What are the torque specifications for John Deere 70 cylinder head bolts?
Torque cylinder head bolts to 140-200 inch-pounds in the sequence shown to assure uniform seating of the head and head gasket. For other torque values, refer to SM 2091, 2-7 HP Tecumseh Engine Service Manual. p. 7
How do I adjust the idle on a John Deere 70 Lawn Tractor?
To adjust the idle, first turn the power adjusting screw clockwise until closed, then open one complete turn. Next, turn the idle adjusting screw clockwise until closed, then open one and one-half turns. The final idle adjustment should be made at an engine speed of 1200 to 1700 rpm. p. 13
What is the crankcase oil capacity for the John Deere 70 Lawn Tractor?
The crankcase capacity for the John Deere 70 Lawn Tractor is 1-1/2 U.S. Pints. The recommended lubricants are AM 30730 Summer and AM 30710 Winter. p. 6
How quickly can I access this John Deere 70 manual after buying?
This is a 36-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Are there any print restrictions on this John Deere 70 manual?
Zero restrictions. The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
Are electrical wiring diagrams included in this John Deere 70 Service Manual?
Complete wiring diagrams are included, covering all electrical circuits, harness routing, and connector pinouts for the John Deere 70.
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