Need the factory specs for your International Cub Lo-Boy? All 225 pages of this Case IH 154, 184, 185 service manual (OEM #GSS-1408) target one machine family: the Cub Lo-Boy tractors and mowers. Inside: full wiring diagrams, hydraulic schematics covering the hitch and lift circuit, and a troubleshooting section that walks through engine tune-up, carburetor faults, and mower drive issues. You also get page after page of exploded-view drawings, standard torque tables for nuts, bolts, and hydraulic fittings, and step-by-step rebuild procedures for the transmission, final drive, clutch, and independent PTO. Set the circuit relief valve to 1550-1600 psi when your lift won't raise; torque 1/4-inch O-ring boss plugs to 6-10 ft. lbs. (8-14 N·m) during hydraulic fitting service. Your Lo-Boy is parked and the dealer clock is running. Download now, pull it up on your phone, and get back to work.
What's Inside This Case IH Cub Lo-Boy 154, 184, 185 Manual
| System | Pages | Key Topics |
|---|---|---|
| Work Safely - Follow These Rules | 5-6 | Preventing Accidental Starting, Preventing Injury From Moving Parts, Fuel Handling, Electrical Safety, Hydraulic Fluid Safety, Compressed Air Safety |
| Standard Torque Data for Nuts and Bolts | 7-8 | Type 1 Studs, Type 1 Bolts (6" or Less), Type 1 Bolts (Longer Than 6"), Type 5 Bolts, Type 8 Bolts |
| Metric Conversion Tables | 9-10 | Millimeters to Inches Conversion, Inches to Millimeters Conversion, Conversion Procedure |
| Standard Torque Data for Hydraulic Tubes and Fittings | 11-12 | Tube Nuts (37° Flared Fittings), O-Ring Boss Plugs, Adjustable Fitting Lock Nuts, Swivel 37° Seats, Adjustable Standard Thread Tube Fittings Installation |
| Flangette Bearing Installation | 13 | Shaft Preparation, Collar Mating, Bearing Positioning, Collar Locking, Set Screw Tightening |
| Special Service Tools Required | 14-15 | Engine Lifting Chain, Piston Fitting Set, Liquid Level Tool, Special Plier, Jackstand, Pressure Gauge |
| Engine | 16-89 | Engine Specifications, Cylinder Head and Valves, Pistons, Connecting Rods, And Crankshaft, Lubrication System, Cooling System, Engine Troubleshooting and Tune-Up |
| Fuel System | 90-113 | Carburetor Specifications, Carburetor Operation, Liquid Level Check, Carburetor Inspection and Repair, Governor, Throttle Adjustment |
| Steering, Front Wheels and Front Axle | 114-123 | Steering Assembly, Front Wheels and Bearings, Front Axle, Steering Knuckle Removal, Installation of Steering Knuckles |
| Main Clutch Shaft and Engine Clutch Assembly | 124-143 | Main Clutch Shaft and Engine Clutch - Serial No. U018709 and Below, Main Clutch Shaft and Engine Clutch - Above Serial No. U018709 |
| Splitting and Recoupling the Tractor | 144-149 | Splitting the Tractor, Recoupling the Tractor |
| Transmission and Differential | 150-168 | Removal and Disassembly, Disassembly, Inspection and Repair, Reassembly |
| Final Drive and Brakes | 169-180 | - |
| Independent Power Take-Off and Mower | 181-204 | - |
| Hitch and Hydraulics | 205-216 | - |
| Electrical | 217-225 | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Torque for O-ring Boss Plugs (1/4 inch size) | 6-10 ft. lbs. (8-14 N·m) | p. 11 |
| Circuit Relief Valve opening pressure | 1550-1600 psi | p. 206 |
Case IH Cub Lo-Boy 154, 184, 185 Common Problems This Manual Covers
Case IH International Cub 154 hydraulic lift fails to raise the mower deck or drops unexpectedly. p. 206
Test the circuit relief valve opening pressure as shown on page 206. Verify the pressure reaches 1550-1600 psi. If pressure is low, inspect the 1/4 inch O-ring boss plugs for leaks. Replace worn seals and torque new plugs to 6-10 ft. lbs. (8-14 N·m) detailed on page 11.
Manual Section: Hitch and HydraulicsEngine fails to start when turning over or stalls immediately after startup.
Inspect the fuel filter and fuel pump for debris from the tank. Drain the system and clear all obstructed fuel passages. Check the troubleshooting procedures for lean idle or air leakage. Tighten the 1/4 inch O-ring boss plugs to 6-10 ft. lbs. (8-14 N·m).
Manual Section: Engine TroubleshootingTransmission slips heavily under load or refuses to fully engage gears during operation. p. 124
Inspect the main clutch shaft and engine clutch assembly on page 124 for worn discs. Measure linkage adjustments and verify pedal return spring tension. Replace worn clutch components and torque all standard 1/4 inch hydraulic line O-ring plugs to 6-10 ft. lbs. (8-14 N·m) upon reassembly.
Manual Section: Main Clutch Shaft and Engine Clutch AssemblyFrequently Asked Questions
What are the main differences between Cub Lo-Boy and Case IH 154, 184, 185 models?
The manual provides specifications that differentiate the models. For instance, the engine governed RPM for the 154 model is 475, while for the 184 & 185 models it is 600. Additionally, the 154 model uses an IH - 3/4 carburetor type with a .040 inch main metering jet size, whereas the 185 model uses a Zenith 68YY7 carburetor with a .048 inch main metering jet size.
How to reset the main clutch on an IH 154, 184, or 185 tractor?
To reset the main clutch, check the clearance between the clutch plate and pressure plate. If the clearance is less than 38 mm (.015 inch) or more than 51 mm (.020 inch), adjustment is necessary. This involves removing the cotter pin and header pin, then shortening or lengthening the clutch rod by turning the clevis until the correct clearance is reached.
What are the torque specs for the engine bolts on a Case IH 154, 184, 185?
Specific torque specifications for engine bolts are provided in the manual. For example, the cylinder head bolts require 45 ft. lbs. of torque, main bearing bolts require 55 ft. lbs., and connecting rod bolts require 16 ft. lbs. The crankshaft pulley bolts should be torqued to 80 ft. lbs.
Are the main clutch and PTO clutch replaceable on IH 154, 184, 185?
Yes, both the main clutch and the PTO clutch are replaceable on IH 154, 184, 185 tractors. The manual provides detailed procedures for the removal, disassembly, inspection, repair, reassembly, and adjustment of the Main Clutch Shaft and Engine Clutch Assembly (Section 4) and the Independent Power Take-Off (IPTO) Clutch Assembly and Drive Shaft (Section 8).
How to reset PTO clutch on IH 154 184 185
To reset the PTO clutch, perform IPTO adjustments by measuring the clutch assembly in both disengaged ("A") and engaged ("B") positions. The difference between these two measurements must be .050 inch. Adjustment involves tightening or loosening the lock nut and installing shims as needed.
What are the replacement specifications for Hydraulic O-ring seals?
Hydraulic O-ring seals are replaceable and are typically provided as part of "service packages" or "seal kits" for specific hydraulic components like the pump, control valve, and cylinders. For example, when disassembling a hydraulic cylinder, instructions include installing a new O-ring (2) and back-up washer (8) in the body.
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