McCormick Super W-6 Tractor Operator's Manual, 1952–1954 (P/N 1 004 251 R1)

International Harvester's Operator's Manual for the McCormick Super W-6, P/N 1 004 251 R1, covers tractor operation, scheduled maintenance, adjustments, troubleshooting, and minor repair work.

PDF Reading and Printing

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One printable, 107-page PDF, including four delivery/service-record pages and five cover, introductory, and safety pages.

Fuel Operation, Ignition, and Tractor Upkeep

The following selected topics outline the manual's coverage rather than reproduce its full contents. Other subjects include drawbar hitch adjustment and liquid tire ballast.

• Fuel system: Gasoline, distillate, and kerosene operating instructions, plus step-by-step carburetor removal and installation, idle adjustment, and main-fuel adjustment.

• Routine maintenance: Lubrication maps, oil-filter replacement, air-cleaner and crankcase-breather service, cooling-system care, fan-belt replacement, and water-pump packing.

• Ignition and electrical service: Distributor and magneto timing, breaker-point checks, generator polarization and commutator cleaning, and starting-motor removal and installation.

• Clutch, brakes, and bearings: Clutch adjustment, brake-pedal adjustment and equalization, and front-wheel bearing removal, cleaning, repacking, and adjustment.

• Hydraulic Remote-Control: Cylinder connection, system filling and air removal, break-away coupling care, and working-depth adjustment through the stroke-limit collar.

• Troubleshooting: Symptom, possible-cause, and remedy tables, with references to the relevant service instructions and identification of work requiring dealer attention.

This manual suits tractor owners handling routine care and mechanically experienced users equipped to check clearances, adjust linkages, and work with ignition systems.

Fuel Use and Scheduled Maintenance

Gasoline tractors have their own starting and operating instructions. Distillate and kerosene versions use a gasoline starting tank, with separate guidance on warm-up, radiator-shutter position, manifold heat control, and fuel changeover.

The lubrication guide maps service points to operating-hour intervals and periodic checks. It distinguishes umbrella-type and radial-fin-type oil-filter elements, whose replacement intervals differ, and provides lubricant specifications and fluid-capacity tables.

The lubrication maps and adjustment drawings help owners identify service points and check the relevant settings before beginning maintenance or minor repairs. Storage preparation and restarting after storage are also covered.

The oil-filter cutaway in Illust. 24 explains oil flow through the element; the air-cleaner exploded view in Illust. 43 identifies the parts removed for cleaning. Cooling-system instructions extend to pressure-cap gasket replacement, radiator cleaning, and fan-belt tension adjustment.

Electrical Service and Fault Finding

The electrical chapters distinguish battery ignition from the IH Type H-4 magneto. Starting and lighting equipment uses a 6-volt, positive-ground system, with service information for the battery, generator, regulator, starting motor, lamps, and cable connections.

Distributor and magneto illustrations identify the breaker mechanisms and condensers. The battery-ignition section also covers the ignition coil, complete ignition-unit removal and installation, and timing to the engine.

Starting and lighting wiring diagrams in Illusts. 57 and 58 show battery-ignition connections; Illust. 60 identifies the magneto-specific differences. Their reference tables identify cables, terminals, wire colors, and instrument-panel connections for tracing the installed circuit.

Troubleshooting addresses hard starting, irregular running or knocking, loss of power, overheating, oil-pressure faults, excessive oil or fuel use, and interrupted fuel delivery. Further entries cover electrical faults, brakes, transmission shifting, steering, wheels, and tires; hydraulic complaints refer back to the Remote-Control service instructions.

Clutch, Brakes, and Engine-Service Limits

The single-plate dry clutch section relates pedal free movement to release-bearing clearance. Brake instructions cover equal pedal travel, equalization, and operating-rod spring preload after disassembly. The double-disc brake cutaway in Illust. 68A explains how the actuating and friction discs apply braking force.

Minor engine service includes cylinder-head gasket tightening guidance and step-by-step valve-clearance adjustment. Full internal-engine overhaul is outside this manual's scope: connecting-rod and crankshaft bearing replacement, piston and ring replacement, and valve grinding are referred to dealer service.

Hydraulic Remote-Control and Special Equipment

Remote-Control coverage describes the engine-mounted pump, control lever and valve, reservoir, hose connections, break-away coupling, and adjustable cylinder stroke. The cylinder package, 356 522 R91, contains a 3-1/2 × 8-inch push-type cylinder with a hydraulic stop and two 140-inch hoses.

The service section specifies IH Touch-Control fluid and distinguishes routine refilling from filling a completely dry unit. Operating instructions explain how the cylinder's stroke-limit collar controls implement working depth.

The special-equipment index identifies belt pulley 357 297 R91, PTO 67 232 D, and service meter 357 108 R91. It also covers high-altitude piston packages, wheel weights, steel-wheel equipment, skid rings, spade lugs, extension tires, swinging drawbar equipment, and pneumatic tire pumps.

Belt-pulley and PTO instructions include operating guidance and speed specifications. The driving section explains the fifth-gear lockout required with steel rear wheels.

Repair Cautions and Operating Safety

Generator cautions identify regulator damage from an accidental connection to the “F” terminal and relay-contact burning from reversed polarity. Other cautions address clutch damage from insufficient pedal free movement and radiator-tube or fin-bond damage during careless fin straightening.

Machine-specific safety instructions cover rotating belt-pulley and PTO equipment, brake-pedal locking, battery isolation, cooling-system pressure, tire servicing, and hydraulic operation. Review the relevant cautions before performing service or adjustment work.

Examples of Ignition, Valve, and Hydraulic Settings

Ignition points: The battery-ignition distributor specifies a 0.020-inch point opening; the H-4 magneto specifies 0.013 inch. Both measurements apply with the breaker rubbing block on the high point of the cam.

Valve clearance: The engine specification is 0.017 inch with the engine warm and the valves closed, measured between the valve levers and valve stems.

Hydraulic filling: Remote-Control specifications distinguish an approximately 7-quart refill from the approximately 7-1/2-quart capacity of a completely dry, new or rebuilt unit.