Factory manual GSS-1504 splits, overhauls, and retimes four tractors across 497 pages: the complete International 3088, 3288, 3488, 3688 service manual PDF, straight from the OEM. Wiring diagrams map the Digital Data Center and cab circuits, hydraulic schematics trace flow through the multiple control valve, and a full battery of numbered hydraulic tests closes the book so you can prove a repair before the tractor leaves your shop. Between those covers sit clutch splits, Torque Amplifier and range transmission overhauls, IPTO clutch pack service, draft control work, and the power multi-disc brakes. Set the power steering relief valve to open at 14823 kPa (2150 psi), and scrap any clutch spring measuring under 63.1 mm free length. A transmission split with cut hay on the ground is a bad time for guesswork. Buy this bookmarked, keyword-friendly PDF once and it stays with the tractor for good.
What's Inside This International 3088, 3288, 3488, 3688 Manual
| System | Pages | Key Topics |
|---|
| A/C and Tractor Splits | 20-49 | Air Conditioning System, Air Conditioning Components |
| Front Axle, Bolster and Wheels | 50-99 | Front Axle, Bolster, Spindle and Hub |
| Steering | 100-125 | Steering Hand Pump, Power Steering Cylinder |
| Engine | 126-135 | Clutch Split, Engine Removal |
| Fuel System | 136-139 | Main Fuel Tank, Auxiliary Fuel Tank |
| Electrical System | 140-159 | Digital Data Center 1A, Wiring Diagrams |
| Cooling System | 160-165 | Forward Air Flow, Radiator Assembly |
| Clutch and Flywheel | 166-175 | Clutch Assembly, Clutch Booster Assembly, Clutch Linkage Adjustment |
| Transmission | 176-247 | Speed Transmission Disassembly, Torque Amplifier Overhaul, Speed Transmission Reassembly, Range Transmission Disassembly, Range Transmission Reassembly |
| Rear Frame Assembly | 248-279 | Differential Assembly, Rear Frame Cover, Draft Control Cylinder |
| Rear Axle Assembly | 280-291 | Rear Axle and Bull Pinion Shaft, High Clearance Drop Housing |
| Brakes | 292-305 | Power Hydraulic Multi-Disc Brakes, Brake Pedal and Linkage Adjustment |
| Independent Power Take Off | 306-331 | Ipto Assembly, Servicing Ipto Components, Ipto Clutch Pack Assembly |
| Hydraulic System | 332-443 | Basic Hydraulic System, Multiple Control Valve |
| Testing Hydraulic System | 444-497 | Test No. 1, Test No. 3, Test No. 9 |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| All Models |
| Standard Torque Data for Hydraulic Tubes and Fittings | 9 to 240 foot pounds | p. 11 |
| Power steering relief valve opening pressure | 14823 kPa (2150 psi) | p. 101 |
| Steering Circuit Leakage maximum slippage | 1 rpm | p. 101 |
| Clutch Spring Free Length | 63.1 mm (2-31/64 in.) | p. 167 |
| Brake diameter | 279.4 mm (11 inch) | p. 292 |
| Differential lock pressure | 1426 to 2068 kPa (230 to 300 psi) | p. 248 |
| Differential case bolts nuts torque | 152 N·m (112 ft. lbs.) | p. 248 |
| Range transmission mainshaft nut torque | 135 N·m (100 ft. lbs.) | p. 248 |
| Wedge lock wheel bolt torque | 542 N·m (400 ft. lbs.) | p. 248 |
| 3088, 3288, 3688 |
| Brake pressure (3088, 3288, 3688) | 1310 to 1930 kPa (190 to 280 psi) | p. 292 |
| 3488 |
| Brake pressure (3488) | 2689 to 3000 kPa (390 to 435 psi) | p. 292 |
| 3088, 3288 |
| Auxiliary valve unlatching pressure (3088, 3288) | 11376 to 13790 kPa (1650 to 2000 psi) | p. 448 |
