Ford 2600, 3600, 4100, 4600, 5600, 6600, 6700, 7600, 7700, TW-10, TW-20, TW-30 1975-1979 Tractor Service Data Book 40881040 English

Brands: Ford / Ford New Holland / New Holland Agriculture

Equipment Type: Tractor

Manuals Type: Service Data Book (The Technician's Bible)

Machine Model & Serial Number: 2600, 3600, 4100, 4600, 5600, 6600, 6700, 7600, 7700, TW-10, TW-20, TW-30 1975-1979

Region: N/R

Book Code: 40881040 (SE3846)

Issued: Reprinted Edition

Language: English

Pages: 152

File Format: Portable Document Format (PDF)

Remark: The absolute 152-page ultimate technical specification bible for Ford tractors. Nuclear Level Info: This manual provides every precision specification required for a full internal engine overhaul, including cylinder bore taper/out-of-round limits, crankshaft re-grinding diameters (for 5 different undersizes), and valve insert counterbore specs. Features exhaustive troubleshooting flowcharts for Dual Power transmissions, hydraulic lift systems, and advanced electrical charging circuits. A non-negotiable requirement for professional rebuilders and service centers dealing with Ford 1000 and TW series tractors.

Table of contents

• ENGINE SYSTEMS (Ford 2600-7700 Series)
  • Trouble Shooting: Low Power, Knocking, Low Oil Pressure, and Overheating Analysis
  • General Specifications: Bore, Stroke, Displacement, and Compression Ratios
  • Cylinder Block: Precision Bore Diameters and Surface Flatness Limits
  • Valve Train: Exhaust/Intake Angles, Lash (Cold), and Stem-to-Guide Clearances
  • Valve Springs: Free Length and Load (at specific heights) Specifications
  • Valve Inserts and Seats: Counterbore Diameters and Seat Run-out Limits
  • Camshaft & Drive Gear: Gear Teeth Count, End Play, and Backlash Calibration
  • Internal Overhaul Components: Connecting Rod Side Float, Piston Grading Diameters, and Ring Gaps
  • Crankshaft: Journal Diameters, Fillet Radii, and Full Re-grinding Specifications (.002 - .040 Undersizes)
  • Lubrication & Cooling: Oil Pump Rotor Clearances, Relief Pressure, and Thermostat Settings
  • Torque Specifications: Main Bearings, Rods, Cylinder Head (Cold), and Manifolds
• FUEL SYSTEMS
  • Diesel Fuel Systems: Troubleshooting Starvation, Surging, and Black Smoke
  • Fuel Injectors: Nozzle 'Buzz', Leak-back, and Opening Pressure Tests (2666-3275 lbf/in²)
  • Turbocharger: Diagnostic Procedures for Lack of Power and Blue Smoke
  • Specifications: Fuel Tank Capacities (With/Less Cab), Pump Timing, and Idle Speeds
  • In-line Injection Pump: Lubricating Oil Capacity and Torque Specs
• ELECTRICAL SYSTEM
  • Instrumentation Troubleshooting: Warning Lights and Gauge Inaccuracy Diagnostics
  • Starting System: No-load Current Draw, Brush Length Minimums, and Armature Run-out
  • Charging System: Alternator Output Terminal Voltages vs. Ambient Temperature (0°F - 160°F)
  • Specifications: Battery AH Rates, Alternator Field Winding Resistance, and Regulator Data
  • Lighting and Torque: Candle Power/Wattage Charts and Electrical Component Torque Values
• CLUTCHES
  • Disc Assembly: Diameter Specs for Single and Double Clutch Variants
  • Setting Dimensions: Double Clutch Adjustment and Pedal Free Play (1.25" - 1.50")
• TRANSMISSION SYSTEMS
  • Troubleshooting: Dual Power Shift Lag and No Power Conditions
  • Specifications: Output/Input Shaft Pre-load Torque and Shim Availability
  • Dual Power: Planetary Gear Set Free Play (0.004" - 0.020") and Pressure Settings (150-185 lbf/in²)
  • Ground Speed Charts: Complete Gear Ratio Matrix for 2600 thru 4600 Models
• POWER TAKE-OFF (PTO)
  • Troubleshooting: Engagement Failures and Clutch Brake Malfunction
  • I.P.T.O. Specifications: Shaft End Play and Pump Pressure Testing (140-155 lbf/in²)
  • Speed Relationship: PTO Speed vs. Rated Engine Speed (540 @ 1800/1900 RPM)
• REAR AXLE AND BRAKES
  • Axle Ratios and Final Reduction Data (Planetary Gear Ratio 4.5)
  • Pre-load and End Play: Differential Bearing and Axle Shaft Specifications
  • Wheel Brakes: Friction Area and Setting Dimensions for Drum/Disc Systems
  • Transmission Handbrake: Pull Specifications and Bearing Pre-load
• HYDRAULIC SYSTEMS
  • Diagnostic Flowcharts: Complete Failure to Lift and Slow Lift Analysis
  • Component Specs: Lift Cylinder Diameters and Valve Opening Pressures (Safety/Cooler/Check Valves)
  • Pump Capacity: Gear Type vs. Piston Type Flow Ratings
  • Valve & Bushing Color Codes: Identification Charts for Precision Flow Control and Unload Valves
• STEERING SYSTEMS
  • Manual vs. Power Steering Troubleshooting and Torque Values
  • Power Steering Pump: Capacity at 1000 RPM and Relief Valve Settings (600-1650 lbf/in²)
  • Specifications: Oil Capacities and Steering Wheel Lock-to-Lock Turns
• FORD TW-10, TW-20, TW-30 SPECIFIC DATA (Pages 97-146)
  • Engine: 401 cu. in. (6580 cc) Detailed Specs and Compression Pressure (325-350 psi)
  • Transmission: Dual Power Underdrive Ratios and Pre-load Torque
  • Rear Axle: Double Reduction Inboard Planetary Ratios and Wheel Tread Ranges
  • Front Wheel Drive: Transfer Box Axial Bearing Pre-load and Steering Knuckle Specs
• SEPARATING THE TRACTOR & ACCESSORIES
  • Buckle-up Bolt Torque Sequences: Rear Axle to Front Transmission and Engine to Front Transmission
  • Air Conditioning: Refrigerant Charge (R-12), Oil Fill, and Pressure Troubleshooting
  • Cab Heating: Heater Matrix and Blower Motor Fault Analysis

Service Professional's Advice
This Service Data Book is the primary reference for all precision repairs on Ford tractors. When re-grinding the crankshaft, journals must be reduced exactly to the undersize dimensions provided to ensure bearing insert compatibility. The Dual Power and I.P.T.O. systems are sensitive to oil temperature—ensure the system reaches operating temperature before conducting pressure tests. Note that for TW series, a separate 120 p.s.i. lubrication pressure specification applies. Use only Ford M2C134-A (or current equivalent) in the hydraulic and transmission systems to prevent chatter in wet disc brakes and damage to planetary components.