1947–1970 Farmall Cub / International Cub & Cub Lo-Boy Tractor Parts Catalog (P/N TC-37F)

International Harvester parts catalog TC-37F covers the 1947–1970 Farmall Cub, International Cub, and International Cub Lo-Boy tractors. This is Revision No. 6, issued in August 1979 as a complete revision replacing earlier issues.

• Engine components: Exploded views and parts lists identify C-60 crankshaft, connecting rod, piston, cylinder head, governor, and lubrication components, along with service packages.

• Fuel and ignition: Carburetor assemblies, fuel strainers, IH J-4 and Wico magnetos, and IH and Prestolite distributors are shown with their replacement parts.

• Drivetrain assemblies: Auburn and Rockford clutches, transmission gears, differential components, final drives, PTO assemblies, and belt pulley units receive separate parts coverage.

• Hydraulics and hitch equipment: Touch-Control cylinder blocks, hydraulic pumps, seal packages, and Fast-Hitch linkages are organized by assembly and applicable tractor configuration.

• Electrical connections: Starting and lighting diagrams show wiring connections, instrument panels, charging equipment, and later magnetic and neutral starting switch arrangements.

• Chassis and steering: Steering gears, brakes, front axles, steering knuckles, wheels, and sheet metal are illustrated with model-specific parts and attaching hardware.

This catalog is suited to owners and mechanics who can interpret exploded drawings and match tractor, engine, and component identification before ordering replacement parts.

Component Walkthrough and Parts Identification

Illustration callouts connect each assembly to its parts list, quantities, and applicable serial numbers. That lets you check the correct version before ordering a shaft, gasket, bearing, or housing. The introductory notes also explain separately ordered attaching hardware and components supplied only as part of an assembly.

Tractor and engine serial numbers serve different purposes in the listings. Matching both helps avoid selecting a part from the wrong production configuration. Detailed overhaul procedures, reassembly instructions, and tightening specifications require a separate service manual.

Engine and Carburetor Variants

Carburetor listings separate engines through serial number 312389 from those beginning at 312390. The corresponding exploded views and service packages help identify the correct components for each assembly.

The crankshaft listing includes a specific bearing compatibility warning: bearings supplied with crankshaft 353743R93 do not fit replacement connecting rod 527457R11. Checking that combination matters when an engine contains replacement components rather than its original rod assemblies.

Electrical Connections and Ignition Components

The wiring drawings distinguish the charging-system change at Cub tractor serial numbers 224400/224401 and Lo-Boy serial numbers 18700/18701. Later drawings cover additional starting-switch arrangements and alternator-equipped Cubs beginning at serial number 248125. Terminal labels, wire colors, and connection points support identification of the applicable circuit layout.

Magneto coverage includes component-level parts drawings. The J-4 listing identifies rotor keeper 352356R11 for protecting the rotor magnet when it is removed from the magneto.

Touch-Control Blocks and Fast-Hitch Linkages

Touch-Control parts are separated by cylinder-block identification. Cub listings cover blocks 351981R1 and 354383R1 through R4, while another section covers block 360719R1 for Cub and Cub Lo-Boy applications. The associated gasket and seal packages differ, making the block number useful when selecting hydraulic replacement parts.

Fast-Hitch drawings distinguish Cub and Lo-Boy arrangements and show the lift, depth-control, and draft-link components. Fixed and adjustable friction-control assemblies also have separate listings. Follow proper shop procedures and OEM safety precautions when working around hydraulics, the PTO, or heavy assemblies.

Selected Transmission and Steering Gear Details

A small selection of gear listings shows the catalog’s serial-specific parts detail. The Cub transmission uses a second-speed gear with 35 teeth through tractor serial number 192112. A 36-tooth version is listed for Cub serial number 192113 and above and for all Cub Lo-Boy tractors.

The steering worm wheel has 21 teeth on Cubs through serial number 221871 and Lo-Boys through 16775. The later 24-tooth wheel applies from Cub serial number 221872 and Lo-Boy serial number 16776. These distinctions help match replacement gears to the applicable tractor configuration.

PDF Navigation, Drawing Detail, and Page Count

Search and drawing detail: PDF text search is unavailable. Two bookmarks lead to the additional opening page and the catalog cover; they do not provide chapter navigation. Printed group and numerical parts indexes provide further references. Small wiring-diagram labels are readable when enlarged.

The download contains one printable PDF with 170 pages: 169 catalog pages, including covers, indexes, and blank divider pages, plus one additional opening page. That additional page is already included in the total.