Part of the New Holland Repair Manuals.
All 450 pages of this New Holland TR75, TR85 Service Manual PDF (OEM #40007521) focus on one job: keeping your twin-rotor combines threshing. You get full-page wiring diagrams for the harness, cranking motor, and charging circuits, plus hydraulic schematics tracing the priority flow divider, steering control unit, and bladder accumulator. Step-by-step teardowns run from the feeder and rotor gearboxes through the hydrostatic system, ground drive transmission, and brakes, backed by torque and conversion charts for SAE Grade 2 through 8 hardware. Set the ratchet clutch to slip at 320-370 ft. lbs., then tension the main drive belt to 1 5/8 inch of deflection under 15 lbs. of force. Harvest doesn't wait on a parts counter. This scanned factory PDF is bookmarked by section; download it, pull it up on your tablet at the machine, and get back in the field.
What's Inside This New Holland TR75, TR85 Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction, About Improvements, Safety and General Information | 2-8 | Service Procedures, Removal, Disassembly, Reassembly, Torque Specifications, Personal Safety, Machine Safety, Safety Stands, Hydraulic Jacks, Safety Latches, Battery Safety, Cap Screws, Carriage Bolts, Flat Washers |
| Feeder and Header Drive | 9-56 | Belt Drives, Ratchet Clutch, Stone Roll, Front Drum, Feeder Floor, Cradle, Feeder Drive Belts, Main Header Drive Belt, Header Idler Sheave, Bell Housing, PTO Shaft, Flex Plate, Engine Sheave, Pivot Shaft |
| Separator, Main Shaft and Rotors | 57-137 | Separator Clutch, Drive Sheave, Clutch Pack, Throw-Out Bearing, Spanner Hub, Left-Hand Bearing Assembly, Right-Hand Bearing Assembly, Main Shaft Removal, Main Shaft Installation, Beater Drive Sheave, Header Drive Sheave, Lower Variator Sheaves, Rotor Drive Vari-Speed Motor, Speed Screw Assembly |
| Concaves, Grates and Discharge Beater | 138-164 | Concave Extensions, Feed Plate Assembly, H-Frame, Concave Removal, Concave Installation, Concave Centering, Concave Leveling, Separator Grate Removal, Separator Grate Installation, Separator Grate Wires, Discharge Beater, Discharge Beater Grate, Beater Drive Sheave, Beater Shaft |
| Cleaning, Loading and Unloading Systems | 165-182 | Cleaning Fan, Cleaning Fan Shaft, Cleaning Fan Blades, Air Deflector, Shoe, Shoe Bushings, Unloading Auger, Cross Shaft, Grain Tank Cross Auger, Loading Auger, 45 Degree Gearbox, Bubble-Up Auger |
| Traction Drive, Transmission and Brakes | 183-236 | Intermediate Sheave, Traction Drive Belts, Bushings, Bearings, Shaft, Input Shaft, Transfer Shaft, Counter Shaft, Shifter Forks, Differential, Brake Housing, Clutch Housing, Pressure Plate, Drive Disc |
| Final Drives, Hydrostatic Drive and Rear Axle | 237-337 | Output Shaft, Input Shaft, Final Drive Housing, Output Gear, Bearing, Lock Tab Washer, Variable Displacement Pump, Fixed Displacement Motor, Charge Pump, Manifold, Shuttle Valve, Relief Valve, Flow Limiters, Rear Wheel Drive Motors |
| Hydraulic System | 338-392 | Priority Flow Divider, Steering Control Unit, Head Lift Cylinder, Unloading Auger Cylinder, Bladder Accumulator, Directional Control Valve |
| Electrical System | 393-430 | Wiring Harness, Cranking Motor, Alternator, Charging System, Battery, Circuit Breakers |
| Specifications, Torque Charts and Labor Guide | 431-444 | Table of Speeds, Feeder Conveyor Chain, Threshing Concaves, Twin Rotors, Cleaning Area, Engine Specifications, Sae Grade Identification, Tightening Torques, Millimeters to Inches, Inches to Millimeters, Hydraulic Tubes and Fittings |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Main drive belt tension | 1 5/8 inch (41 mm) deflection with 15 lbs (7 kg) of force | p. 10 |
| V-belt tension | 1-13/32 inch (36 mm) | p. 10 |
| Upper shaft idler bearing preload | 6-12 in. lbs. (1.05-2.1 N·m) | p. 12 |
| Intermediate idler sheave bearing preload | 6-12 in. lbs. (1.05-2.1 N·m) | p. 13 |
| Ratchet clutch slip torque | 320-370 ft. lbs. (416-481 N·m) | p. 24 |
| Ratchet clutch check slip torque | 184-212 ft. lbs. (240-276 N·m) | p. 24 |
| Feeder chain tension | 1/2 inch sag at mid span | p. 24 |
| spanner nut rolling torque | 6-12 in. lbs. | p. 104 |
| Spring length | 2-9/16 inch (65 mm) | p. 172 |
| Accumulator nitrogen pre-charge | 750 psi (52 bar) | p. 341 |
| Priority System (Steering System) pressure | 2000 + 100 - 0 psi (138 + 7 - 0 bar) | p. 342 |
