Service Manual for International Cub 154, 184 and 185 Lo-Boy Tractors and Mowers 1969-1979
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Models Covered & Key Technical Specifications
- International Cub 154 Lo-Boy (1969-1974)
- International Cub 185 Lo-Boy (1974-1976)
- International Cub 184 Lo-Boy (1977-1979)
Professional Workshop Service Manual & Technical Specifications
Master Your Classic International Cub Lo-Boy: The Ultimate Service Authority
Unlock the full potential of your International Cub Lo-Boy with the most comprehensive service manual available. This isn't just a basic repair guide; it is the definitive technical resource used by professional International Harvester mechanics to keep these legendary machines running in peak condition.
Specifically compiled for the unique offset design of the Lo-Boy series, this manual provides deep-dive technical data that you won't find in a standard operator’s manual. From the high-revving C-60 engine of the 184 to the classic driveline of the 154, every nut, bolt, and clearance is documented with precision.
Complete Model Coverage
- International Cub 154 Lo-Boy (1969-1974)
- International Cub 185 Lo-Boy (1974-1976)
- International Cub 184 Lo-Boy (1977-1979)
Expert Engine & Performance Tuning
Get under the hood of the C-60 four-cylinder engine with confidence. This guide covers everything from routine tune-ups to complete block re-boring.
- Precision Specifications: Detailed tolerances for cylinder bores (2.625–2.627 inches), crankshaft main journals (1.623–1.624 inches), and valve lash (.015 inch cold).
- Advanced Timing: Step-by-step instructions for setting ignition timing to the exact 16° BTDC at high idle required for the 184 and 185 models.
- Fuel System Mastery: Complete teardown and adjustment for both IH and Zenith up-draft carburetors, including exact float heights and jet sizes.
Professional Driveline & Transmission Service
The Cub Lo-Boy's unique mid-mounted PTO and transmission require specialized knowledge. This manual simplifies the most complex tasks:
- Clutch Systems: Comprehensive coverage for tractors below and above Serial No. U018709, plus the specialized Electric IPTO clutch found on the 184.
- Transmission & Differential: Full procedures for the 3-speed sliding spur gear transmission, including critical bevel pinion and drive gear backlash settings (.003 to .005 inch).
- Brake Calibration: Detailed steps for equalizing both single-pedal and two-pedal external contracting drum brakes to ensure safe operation.
Specialized Systems & Attachments
- Hydraulics: Service the Cessna or IH single-acting cylinders and learn to adjust the circuit relief valves (1500–1600 psi) for maximum lifting power.
- Steering & Front Axle: Keep your steering tight with cam-and-lever assembly guides and exact toe-in adjustments (1/4 inch).
- Mower Maintenance: Exclusive sections on mower spindle assembly, blade sharpening (25° angle), and drive belt tensioning.
Critical Technical Reference
- Serial Number Specifics: Includes vital changes for components like the resistor unit (Serial No. U046614 and above) and clutch configurations (Serial No. U018709 threshold).
- Torque Benchmarks: Never second-guess a bolt with clear torque specs—Cylinder Head (45 ft. lbs.), Main Bearings (55 ft. lbs.), and Flywheel (45 ft. lbs.).
- Wiring & Safety: Full schematics for the safety starting circuits and Delco Remy electrical components.
Whether you are performing a simple oil change or a ground-up restoration, this manual provides the Blue Ribbon level of detail necessary to preserve the heritage and performance of your International Cub Lo-Boy tractor.
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