Part of the John Deere Repair Manuals.
Every one of the 308 pages in this John Deere 110, 112 Service Manual PDF covers your Lawn and Garden Tractor, from the Kohler and Tecumseh engines to the 3-speed and 4-speed transaxles. You get factory wiring diagrams for the ignition, charging, and motor-generator circuits, hydraulic schematics for the control valve, pump, and cylinder, plus exploded views throughout. Inside: carburetor and fuel system procedures, clutch and brake work, variable speed drive, differential teardown, steering linkage, and full bolt torque charts. Gap the Kohler spark plug at 0.025 in., the Tecumseh at 0.030 in., and set breaker points to 0.020 in. before you chase that miss any further. No more diagnosing a dead charging circuit with a multimeter and a prayer. Bookmarked and keyword-searchable; download it, pull it up on your phone at the bench, and get back to mowing.
What's Inside This John Deere 110, 112 Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 2 | Diagnosing Malfunctions, Analysis, Testing |
| General | 3-16 | Tractor Identification (Serial Numbers, Vintage Information, Serial Number Plates, Identification Codes, Tractor Codes, Tire Codes, Tire Interchangeability) |
| Engine | 17-120 | Kohler Engine, Tecumseh Engine, Cylinder Head, Valves, Breather, Piston, Crankshaft, Main Bearings |
| Fuel System | 121-140 | Carburetor, Air Cleaner, Sediment Bowl, Fuel Strainer, Gas Tank |
| Electrical System | 141-190 | Ignition System, Charging System, Motor-Generator, Voltage Regulator, Electrical Accessories, Battery |
| Power Train | 191-254 | Clutch, Brake, Variable Speed Drive, 3-Speed Transaxle, 4-Speed Transaxle, Differential Assembly |
| Hydraulic ·System | 255-282 | Control Valve, Pump, Cylinder |
| Miscellaneous | 283-308 | Steering Linkage, Front Wheels, Axles, Lift Linkage |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Spark plug gap (Kohler) | 0.025 in. | p. 11 |
| Spark plug gap (Tecumseh) | 0.030 in. | p. 11 |
| Breaker point gap | 0.020 in. | p. 12 |
| Coil secondary continuity | 3.9-4.08 OHMS | p. 12 |
| High speed (No load) speed | 3800 rpm | p. 129 |
| Idle speed (No load) speed | 1200-1700 rpm | p. 129 |
| Coil Operating amperage | 2.25 Max. @ 21,000 volts | p. 164 |
| Relief valve operating pressure | 800 (-0 +100) psi | p. 257 |
| 12-Point Cap Screws | 7-10 ft-lbs | p. 280 |
| 110 | ||
| Cylinder Head Bolt Torque (Kohler) | 200 in-lbs | p. 41 |
| Spark Plug Torque (Kohler) | 27 ft-lbs | p. 41 |
| 112 | ||
| Cylinder Head Bolt Torque (Tecumseh) | 200 in-lbs | p. 91 |
John Deere 110, 112 Common Problems This Manual Covers
John Deere 110 engine cranks but won't start, no spark at plug
Remove the flywheel screen and check the breaker points first. Replace pitted points and set the gap to 0.020 in., the spec on page 12. Gap a new plug to 0.025 in. for the Kohler engine and torque it to 27 ft-lbs cold. Still no spark? Test coil secondary continuity, 3.9 to 4.08 ohms.
Manual Section: Engine Troubleshooting (Kohler)Engine surges at full throttle and stumbles at idle after sitting all winter
Drain the float bowl and pull the carburetor for a full cleaning; gum from stale fuel plugs the idle circuit. Clean the fuel strainer and sediment bowl while the tank is drained. After reassembly set idle speed to 1200-1700 rpm and high speed no load to 3800 rpm, the specs on page 129.
Manual Section: Fuel System p. 121Hydraulic lift raises the mower deck slowly and leaks down within minutes
Check reservoir fluid level first, then run the engine and inspect every line and fitting for seepage. Verify the relief valve opens at 800 (-0 +100) psi, covered on page 257. If the valve checks good and the deck still drops, replace the cylinder seals. Torque the relief valve plug to 20-25 ft-lbs on reassembly.
Manual Section: Hydraulic System p. 255Battery discharges overnight and the motor-generator shows no charging output at the regulator
Check battery connections for corrosion and load test the battery before blaming the charging system. Trace the charging circuit with the wiring diagram on page 144 and confirm generator output at the regulator. If the motor-generator needs rebuilding, torque the thru bolts to 170-200 in-lbs during reassembly.
Manual Section: Electrical System p. 141Steering wheel has excessive free play and front tires scrub during tight turns
Inspect tie rod ends for slop with the front end jacked up; worn ends are a known weak point on these tractors. Check the steering gear housing for leaks and adjust gear mesh before replacing parts. Torque the steering gear plug to 7-12 ft-lbs, the spec on page 293, then grease the spindles.
Manual Section: Steering Linkage Troubleshooting p. 293Frequently Asked Questions
How do I adjust the belt drive/variator on a John Deere 110 or 112?
To adjust the variator linkage, place the variable speed lever in notch 3 on the quadrant. Measure the distance between the bottom of the footrest and the top of the clutch-brake arm; this should be 1/2 inch. Adjust the rod or clevis at 'D' or 'A' until this 1/2 inch dimension is achieved, as detailed on page 55. p. 55
How do I troubleshoot a no-start or weak spark on a John Deere 110/112?
If the engine will not start, remove the ignition cable from the spark plug and hold it approximately 1/4 inch away from the spark plug terminal while cranking. If there is no spark or a weak spark, the issue is likely in the electrical system, specifically the breaker points or condenser. Clean or replace the points and adjust the gap to 0.020 inch. p. 23
What is the correct cylinder head bolt torque for the Kohler engine in a 110 tractor?
The cylinder head bolts for the Kohler engine in the 110 tractor should be torqued to 200 inch-pounds. p. 41
What is the correct valve clearance for the Tecumseh engine in a 112 tractor?
The valve clearance for both the intake and exhaust valves on the Tecumseh HH100 engine (cold) is 0.010 inch. p. 91
What is the fuel tank capacity for the 110 and 112 tractors?
The fuel tank capacity for both the 110 and 112 tractors is 1.9 U.S. gallons. p. 7
Do I get instant access to this John Deere 110 Service Manual?
A 308-page Service Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Can I print specific sections of this John Deere 110 Service Manual?
Printing is allowed without restriction. Pull the pages you need for the job and bin them when they get greasy.
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