John Deere 110 & 112 Lawn and Garden Tractors Service Manual 1963–1967 (P/N SM-2059)

• Covers 1963–1967 John Deere 110 tractors through serial 100,000 and 1966–1967 John Deere 112 tractors through serial 100,000, including manual-lift 110/112 and hydraulic-lift 110H/112H configurations with Kohler K161S, Kohler K181S, and Tecumseh HH100 engines.
• Engine chapters cover compression and crankcase-vacuum diagnosis, engine removal, cylinder-head and valve repair, piston/crankshaft/main-bearing work, camshaft/tappet/governor service, inspection limits, reassembly, and final adjustments.
• Power-train coverage includes the clutch-brake and variable-speed drive, primary and secondary V-belts, variator and belt-guide adjustments, plus complete 3-speed and 4-speed transaxle removal, internal inspection, repair, reassembly, and shift-linkage setup.
• Hydraulic-lift sections for 110H and 112H include system analysis, pressure/flow testing, control-valve disassembly, gear-pump repair, relief-valve adjustment, hydraulic-cylinder removal/installation, and lift-control adjustments.
• Electrical service includes ignition and charging-system fault diagnosis, battery/coil/condenser/solenoid tests, motor-generator and regulator testing, neutral-start and mower-safety-switch adjustment, serial-specific wiring diagrams, and accessory circuits.
• This is John Deere Service Manual SM-2059. The PDF contains torque and clearance tables, wear limits, capacities, tune-up data, special-tool references, cutaway/section views, wiring schematics, hydraulic flow diagrams, and exploded assembly drawings.

This PDF reproduces John Deere Service Manual SM-2059 for the round-fender 110 and 112 Lawn and Garden Tractors. Deere’s introduction addresses the serviceman and states that basic four-cycle engine operation, carburetion, and ignition theory are omitted, so the repair procedures are suited to readers who already have working mechanical knowledge and are comfortable with test equipment, measurement, and component disassembly.

Model and Serial-Number Coverage

The vintage and identification pages make the configuration breaks unusually clear. The 1963 110 through serial 3550 uses the Kohler K161S and a 3-speed transaxle. The 1964 110, serial 3551–15000, changes to the K181S while retaining the 3-speed unit. From serial 15001 forward, the 110 uses the 4-speed transaxle; hydraulic-lift 110H coverage begins with the 1966 serial range starting at 40001. The 112 and 112H are covered for 1966–1967 through serial 100,000 with the Tecumseh HH100 and 4-speed transaxle. Serial-plate illustrations also show Deere’s changing identification formats, including lift-type and tractor-series coding.

Engine, Fuel, and Drive Repair Depth

The engine sections go well beyond routine maintenance. Kohler K161S/K181S and Tecumseh HH100 chapters cover valve and cylinder-head inspection, valve-guide and seat work, piston and ring analysis, crankshaft and connecting-rod checks, cylinder-bore inspection and reconditioning, flywheel service, camshaft/tappet/governor repair, and engine reassembly. The Kohler material identifies Automatic Compression Release changes and hydraulic-lift engine hardware at the applicable serial breaks, while the HH100 section covers the Tecumseh EZEE-Start compression-release system.

Fuel-system coverage includes Carter carburetor service for the 110 and Walbro carburetor service for the 112, along with carburetor disassembly, inspection, float and mixture adjustment, air-cleaner service, sediment bowl, fuel strainer, and gas tank. The power-train groups then carry the repair work through variable-speed control diagnosis, clutch/brake service, belt replacement and adjustment, differential and shaft inspection, shifter assemblies, seals, bearings, and transaxle installation.

Hydraulic, Electrical, and Diagram Coverage

For hydraulic-lift tractors, the manual explains the open-center system built around the engine-mounted gear pump, reservoir, control valve, hoses, and double-acting cylinder. It includes oil-leakage and loss-of-pressure analysis, erratic-lift diagnosis, pressure and flow testing with factory-referenced test equipment, pump and valve disassembly, inspection and reassembly, and lift-linkage/depth-control adjustments. Manual-lift linkage is handled separately in Section 70.

Useful diagram examples include the Wiring Schematic (-3550), Wiring Schematic (3551-15000), Electrical System Wiring Diagram (15001-), Schematic View of Hydraulic System, Oil Flow Schematic – Raised Position, and cutaway/exploded views of the 3-speed and 4-speed transaxles. Special-tool tables identify equipment such as Tecumseh flywheel puller No. 25183, flywheel holding tool No. 21637, OTC hydraulic tester Y-81-2-1, and OTC in-line hydraulic tester Y-90.

The manual also calls out repair traps that matter during teardown. In the Kohler camshaft section, driving the camshaft pin from the wrong side is specifically warned against because it can damage the cylinder block. In the hydraulic section, contaminated oil is tied to scoring of the pump diaphragm/body and resulting pressure loss. Follow the manual’s component-specific cautions when working around rotating drive parts, engine internals, and hydraulic pressure.

File Scope

330 PDF pages total. The Deere SM-2059 service-manual scan occupies PDF pages 2–308; page 1 is a non-Deere cover, page 309 is effectively blank, and pages 310–330 are unrelated legacy seller/archive material rather than part of the Deere manual. Coverage ends at tractor serial 100,000; later 110/112 designs are outside this publication.