Ford TW-5, TW-15, TW-25 & TW-35 Tractor Shop Manual - Factory Diagnostics & Procedures, 1983-1989

Ford TW-5, TW-15, TW-25 & TW-35 Tractor Shop Manual

Keep your high-horsepower Ford tractors in peak operating condition with this professional-grade shop manual. Covering the heavy-duty TW Series from 1983 through 1989, this comprehensive guide is the same resource used by factory-trained technicians to diagnose, maintain, and repair these six-cylinder diesel workhorses. Whether you are managing a fleet of Mark II units or restoring an early TW-5, this manual provides the technical depth required for complex engine overhauls and precision hydraulic calibrations.

Detailed Model Coverage

This manual is specifically authored for the following Ford TW Series tractors:

• Ford TW-5 (1983-1985)
• Ford TW-15 (1983-1985)
• Ford TW-25 (1983-1985)
• Ford TW-35 (1983-1985)
• Ford TW-5 Mark II (1985-1989)
• Ford TW-15 Mark II (1985-1989)
• Ford TW-25 Mark II (1985-1989)
• Ford TW-35 Mark II (1985-1989)

Note for owners: Tractor identification numbers are located on a plate mounted on the frame behind the right-hand radiator side panel. On FWD models, a front axle identification plate is also located on the rear of the front axle housing.

Technical Highlights & Specifications

• Heavy-Duty Powerplants: Comprehensive data for the 401 cu. in. (6.6L) six-cylinder direct injection diesel engine. Includes detailed specifications for the AiResearch turbocharger found on the TW-15, TW-25, and TW-35, including the TW-35's unique intercooler system.
• Precision Hydraulics: Covers both the high-pressure lift system and the low-pressure system (8 GPM) that operates the PTO clutch, differential lock, and Dual Power planetary gear assembly.
• Drivetrain & Axles: Detailed service procedures for the 8-speed gear transmission and the specialized APL-series front wheel drive axles (APL-345, APL-355, APL-365, and the early TW-35 APL-3054).
• Advanced Electronics: Complete troubleshooting for the electronic instrument panel, including calibration for ground speed sensors and diagnostic codes like OPEN, SH:CR, and FAIL.

Essential Service Data Included

• Engine Tuning: Firing order (1-5-3-6-2-4), valve tappet gaps, and injection timing (25 degrees BTDC).
• Critical Clearances: Specifications for crankshaft journals, camshaft bearing running clearance (0.001–0.003 in), and piston skirt tolerances.
• Fluid Capacities: Precise measurements for cooling systems (up to 23.25 qts), crankcase changes, and the large fuel reservoirs (up to 75 gallons for main tanks).
• Torque Specs: Critical values for cylinder heads, connecting rods, and the high-torque axle mounting bolts (up to 250 ft.-lbs).

Why This Shop Manual Is Indispensable

• Factory Procedures: Includes complex "tractor split" instructions for engine, transmission, and rear axle separation.
• Professional Troubleshooting: Step-by-step logic for when the PTO won't stop, the hydraulic lift fails under load, or the engine loses power.
• Dual Dimensions: All specifications are provided in both U.S. Customary and Metric (SI) units for global compatibility.
• Visual Accuracy: Dozens of exploded views and wiring diagrams ensure you see exactly how components like the limited-slip differential or power brake valve fit together.

Stop guessing and start fixing with the most accurate technical data available for your Ford TW Series tractor. This manual is designed for high-resolution viewing on mobile devices and tablets, making it the perfect companion for the workshop or the field.