1969-1979 International Cub 154, 184 & 185 Lo-Boy Tractor and Mower Factory Service Manual

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International Models Covered & Key Technical Specifications

Models: International Cub 154 Lo-Boy, International Cub 184 Lo-Boy, International Cub 185 Lo-Boy
Sub-models / Variants: Tractor and Mower
Trade Names: Lo-Boy
Model Years: 1969–1979
Technical Data:

  • Engine displacement: 59.5 cubic inches
  • Engine configuration: 4-cylinder
  • Compression ratio: 7.5:1
  • Firing order: 1-3-4-2
  • Ignition timing (high idle): 16° BTDC
  • Valve lash (cold): 0.015 inch
  • Main journal diameter: 1.623–1.624 inches
  • Oil pressure (at 2200 rpm): 30 psi
  • Cylinder head bolt torque: 45 ft. lbs.
Technical Specifications
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Document Number / Seller:
30958 / Thomas Thompson
File Size:
32.82 MB
File Type:
PDF
Language:
English
Pages:
206
Printable:
Yes
Category:
Tractor
Last updated / verified
Jun 14, 2026

International Manual Features & Content Preview

  • Covers 1969–1979 International Cub 154, 184, and 185 Lo-Boy tractors and mowers
  • Official International Harvester publication GSS-1408 W, Revision 4, September 1978
  • Contains 83 exploded-view diagrams, 16 troubleshooting reference charts, and 5 detailed technical specification tables
  • 206 pages of factory-verified service data for the C-60 engine series, including cooling system configurations
  • This 1978 revision is the authoritative reference for the Lo-Boy build, featuring specific carburetor and governor tuning procedures not found in earlier editions

Engine and Fuel System Documentation

Navigating the C-60 series engine demands reliable clearance data. This manual breaks down cylinder head service, valve lash adjustments, and piston reconditioning. You get the exact component-specific tolerances and wear limits needed for precision crankshaft bearing fitting. The fuel system chapters dive deep into both IH and Zenith carburetor configurations. Expect detailed tables on liquid level checks and float assembly adjustments to streamline your diagnostic workflow in the shop. Keep in mind that heavy machinery maintenance carries inherent risks, so always verify your shop safety protocols and consult a certified technician if you hit a diagnostic dead end.

Specification Highlights and Technical Data

Guesswork has no place in an engine rebuild. This documentation outlines all critical engine timing and governor synchronization parameters. Need torque specs? Cylinder head bolts are clearly documented at 45 ft. lbs. in the engine assembly data. Intake valve clearance is listed straight from the factory cold valve lash table at 0.015 inches. The charts also confirm the lubrication system's pressure regulator valve operates at 30 psi at 2200 rpm. Beyond the engine block, the technical appendices deliver gear train timing marks, ignition distributor point gaps of 0.020 inches, and rigorous cooling system maintenance schedules for the Lo-Boy platform.

Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

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