McCormick Farmall H / HV Tractors Parts Catalog (P/N TC-27D)

• Catalog identity and model coverage: Factory International Harvester parts-catalog content for McCormick Farmall H and HV tractors. IH identifies the publication as TC-27E, issued to replace TC-27D; the PDF also retains an added 2006 reproduction cover labeled TC-27D.
• Four-cylinder engine parts: Exploded views and listings for the cylinder head, valves and rocker gear, crankcase, crankshaft, connecting rods, pistons, sleeves, camshaft, governor, oil pump and filter, manifold, carburetor, fan, thermostat, and water pump.
• Fuel and altitude configurations: Separate factory listings for gasoline, kerosene, and distillate equipment, including standard- and high-altitude piston applications and complete service-engine assemblies.
• Electrical equipment and wiring: International H-4 magneto, battery-ignition distributor, cranking motor, Delco-Remy and Bosch generator equipment, lights, switches, regulator, cables, spark plugs, and battery-ignition, magneto-ignition, and Bosch no-battery wiring diagrams.
• Chassis and driveline coverage: Clutches and controls, five-speed transmission, differential, rear axles, countershaft and disc brakes, steering, front bolsters and axles, wheels, seats, fuel system, radiator, grille, drawbars, PTO, and H- or HV-specific components.
• Lift-All hydraulics and catalog tools: Pump unit, delayed-lift valve, hydraulic cylinders, selective-lift control, remote valve and coupling components, followed by Details of Assembly tables, a suffix-letter code chart, and a numerical OEM part-number index.

This 317-page PDF reproduces the illustrated factory parts catalog for Farmall H and HV tractors, including the standard Farmall H and high-clearance Farmall HV configurations. Exploded-view illustrations are paired with numbered parts lists showing factory part numbers, descriptions, quantities, and, where applicable, serial-number breaks, model restrictions, optional-equipment notes, or replacement references. That structure is particularly useful when building a parts order before a repair or checking whether loose components belong to the same assembly.

Engine and Configuration Identification

International Harvester describes both tractors as using a carbureted four-cylinder engine. The engine section traces assemblies from the cylinder head and valve train through the crankcase, crankshaft, rods, pistons, sleeves, lubrication system, cooling system, governor, manifold, and International D-10 updraft carburetor. Listings distinguish gasoline from kerosene and distillate applications. They also identify standard, 5,000-foot, and 8,000-foot piston arrangements, helping prevent a repair from being planned around the wrong compression configuration.

Serial applicability is built into many listings. Examples include changes to cylinder heads, carburetor throttle bodies, oil filters, magnetos, hydraulic pump components, seats, axle parts, seals, and gears. The suffix-letter code section decodes special tractor configurations used after serial FBH 20890, including fuel type, altitude pistons, gearing, starting and lighting equipment, ignition, and front-axle options.

Electrical, Chassis, and Hydraulic Detail

The electrical section covers both parts and circuit layout. Separate diagrams show lighting and starting with battery ignition, a special magneto-ignition arrangement, and the Bosch no-battery generator system. Chassis pages identify the relationship among transmission, clutch, differential, brakes, steering, axles, wheels, drawbar, controls, and sheet-metal components, with dedicated H-only and HV-only illustrations where the tractors differ.

Two fitment traps deserve attention. The catalog lists an Auburn clutch for serials 332221–391357 and a Rockford clutch from 391358 and up, so the tractor serial must be checked before ordering clutch repair parts. In the Lift-All section, the delayed-lift valve differs between the regular pump unit and the higher-pressure pump stenciled “8”; the catalog assigns them different release ranges, so those components should not be treated as interchangeable.

What This Catalog Does—and Does Not—Provide

The Details of Assembly section expands selected factory assemblies into component-level lists and flags parts not supplied separately. The numerical index then lets a known OEM number be traced back to its catalog page. Together, these tools support accurate identification during restoration, parts sourcing, and repair planning.

This is a parts catalog, not a service or repair manual. It does not provide step-by-step removal or overhaul procedures, troubleshooting routines, torque specifications, running clearances, wear limits, fluid capacities, or electrical and hydraulic test procedures. It is best suited to restoration shops, tractor mechanics, parts specialists, and experienced owners who understand vintage tractor disassembly and need factory identification data.

Heavy castings, spring-loaded and rotating components, electrical circuits, and trapped hydraulic pressure can cause serious injury. Support the tractor and removed assemblies correctly, isolate electrical power, relieve hydraulic pressure, and use the applicable IH service instructions and proper lifting equipment before beginning repair work.