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

Diagnostic procedures and component service for your International Cub Lo-Boy tractor, covering engine removal, installation, and detailed component repair. Ref: GSS-1408

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Document Details

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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
Dec 22, 2025

Models Covered & Key Technical Specifications

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

Covers your Lo-Boy tractor with detailed service information for engine, components, and troubleshooting.

  • Engine Specifications: 59.5 cubic inches displacement, 7.5:1 compression ratio, 16° BTDC high idle ignition timing.
  • Valve Specifications: .015 inch cold valve lash, 45-1/2 degree valve refacing angle.
  • Connecting Rod Specifications: 1.625 + .025 inches bearing OD and spread, .002 - .003 inch rod bearing running clearance.
  • Piston Specifications: 2.6230 - 2.6234 inches piston diameter, 3 rings per piston.
  • Crankshaft Specifications: 1.623 - 1.624 inches main journal diameter, .004 - .008 inch thrust bearing side clearance.
  • Timing Gear Specifications: 36 teeth camshaft gear, 90 ft. lbs. idler shaft retainer bolt tension.

Professional Workshop Service Manual & Technical Specifications

Commercial Calibration Training Manual: Tractor Service Manual for International Cub 154, 184 and 185 Lo-Boy Tractors and Mowers 1969-1979 Overhaul-Reference

Product-Line: Tractor // Repair-Classification: Engine & Drivetrain Logic // Operational-Scope: Service Procedures. The documentation provides guidance on:

Engine

Specifications Engine Removal Engine Installation

Cylinder Head

Valves Connecting Rods, Pistons and Piston Rings Crankcase Cylinder Re-Boring Procedure Timing Gear Train and Front Cover

Camshaft

Crankshaft and Main Bearings Lubricating Oil Pump Cooling System Trouble Shooting Tune-Up

Carburetor

Specifications General Description Carburetor Operation Liquid Level Check (Carburetor on Engine) Removal and Installation of Carburetor Inspection and Repair Diagnosing Engine Troubles Fuel System Conditions Affecting Power Loss Fuel System Conditions Affecting Fuel Economy Principles of Operation Governor Removal, Inspection and Repair Adjustments

Main Clutch Shaft and Engine Clutch

154 & 185 Tractors (Below Serial No. U018709) 154 & 185 Tractors (Above Serial No. U018709) 184 Tractor Adjustments

Transmission and Differential

Specifications Transmission Countershaft spacer lengths Differential General

Creeper Drive (154 & 185 Tractors)

Removal Disassembly Inspection and Repair Reassembly

Creeper Drive (184 Tractor)

Removal Installation

Final Drive and Brakes

Specifications Final Drive Rear Axles Differential Shafts Brakes Brake Adjustment - Single Pedal Brakes Brake Adjustment - Two Pedal Brakes

Independent Power Take-Off and Mower

154 & 185 Tractors Checks Before Removal Removal Disassembly Inspection and Repair Reassembly and Installation IPTO Adjustments 184 Tractor Electric IPTO Clutch and Drive Shaft Assembly Drive Belt Replacement MOWER Mower Spindle Assembly Drive Belt Tension Blade Care

Hydraulic Lift and Three-Point Hitch

CONTENTS Specifications Hydraulic Lift Checking the Hydraulic System Hydraulic Pump Control Valve Circuit Relief Valve Hydraulic Cylinder (Cessna) Hydraulic Cylinder (IH) Three-Point Hitch Removal Adjustments Lift Links and Leveling Screws Hitch Upper Link

Electrical

CONTENTS SPECIFICATIONS 154 & 185 TRACTORS Motor Generator Voltage Regulator Distributor Electric PTO Clutch WIRING DIAGRAM 154 & 185 TRACTORS SAFETY STARTING CIRCUIT SPECIFICATIONS 184 TRACTOR WIRING DIAGRAM SAFETY STARTING CIRCUIT RESISTOR UNIT This manual details procedures for the disassembly, inspection, repair, and reassembly of various tractor components. Structured guidance covers engine systems, fuel delivery, lubrication, cooling, ignition, and more. It documents torque specifications for cylinder head installation to ensure proper seal compression uniformity.

FAQ

What **calibrated** values are specified for the engine's lubrication system? keyboard_arrow_down

0.002 to .003 inch is the specified bearing clearance for the crankshaft, and 10 to 20 inch pounds is the bearing pre-load for the differential shafts.

Assess the **applicable** tool requirements for adjusting the PTO clutch assembly. keyboard_arrow_down

A 15/16 inch socket and a 1/8 inch Allen wrench are required for adjusting the PTO clutch assembly spline end, with measurements of .050 inch difference between engaged and disengaged positions.

What **exact** electrical values are relevant for the distributor? keyboard_arrow_down

The distributor has specific degrees of automatic spark advance at various engine RPMs, for example, 0-1 degrees at 400 RPM and 15-16 degrees at 1800 RPM.

Confirm the **specific** calibration settings for the idle adjustment screw. keyboard_arrow_down

The idle adjustment screw should be turned clockwise until lightly seated, then backed out approximately one turn open to achieve the correct idle speed and smoothest engine operation.

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Reviews (4)

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The diagrams are clear and easy to follow. I had a smooth download process, and the support team was very helpful with my questions. Great purchase!
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The guide is solid, but I wish it included more real-world examples. Overall, the download was quick, and customer service was outstanding!
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As a seasoned mechanic, I found this guide to be comprehensive and informative. The email support was responsive, which made my experience even better. Will definitely refer to it again!
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This manual is incredibly detailed. The step-by-step instructions helped me maintain my tractor's clutch and transmission without any hassle. Highly recommend it!