New Holland TR86, TR87, TR88 TR Series Combine Repair Manual 40008630 English

Brands: New Holland / New Holland Agriculture

Equipment Type: Combine (Twin Rotor)

Manuals Type: Repair Manual

Machine Model & Serial Number: TR86, TR87, TR88

Region: N/R

Book Code: 40008630

Issued: 1996 Edition

Language: English

Pages: 1821

File Format: Portable Document Format (PDF)

Remark: The absolute definitive 1,821-page factory repair bible for the New Holland Twin Rotor (TR86, TR87, TR88) combines. Nuclear Level Detail: This massive compendium covers all 24 critical systems. Features surgical teardown and reassembly protocols for the exclusive Twin Rotor drive systems, Series 90 Hydrostatic systems, and comprehensive Electronic Stone Trap (E.S.T.) logic. Includes extreme deep-level diagnostics for electrohydraulic stack valves, planetary final drives, and the Terrain Tracer lateral float cylinder systems. The non-negotiable asset for complete combine restoration.

Table of contents

• SECTION 0 - GENERAL AND SAFETY INFORMATION
• SECTION 1 - ELECTRICAL SYSTEM
  • General Electrical and Solenoid Coils
  • Air Conditioning Electrical System
  • Variable Speed Control and Engine Electrical Systems
  • Electronic Stone Trap (E.S.T.) Electrical System
  • Electrohydraulic Electrical System
  • Thresher Drive Control and Wiring Diagrams
• SECTION 2 - HYDRAULIC SYSTEM
  • Electrohydraulic Stack Valve Operation and Service
  • Hydraulic Pump and Steering Control Unit Overhaul
  • Accumulator Precharging
  • Unloading Auger Drive and Head Drive Control
• SECTION 3 - MONITOR SYSTEM
  • Ground Speed Calibration and Monitor Circuits
  • Grain Loss Monitor and Instrument Bar Circuits
• SECTION 4 - SEPARATOR CLUTCH (Overhaul and Adjustments)
• SECTION 5 - ENGINE PTO
  • Caterpillar Engine Bell Housing Service
  • Ford Engine Bell Housing Service
• SECTION 6 - FEEDER
  • Front Drum Disassembly and Reassembly
  • Right Side Drives (Fixed and Variable Speed)
  • Feeder Slip Clutch and Stone Roll Service
• SECTION 7 - ROTOR DRIVE
• SECTION 8 - ROTORS
• SECTION 9 - ROTOR GEARBOXES
• SECTION 10 - CONCAVES
• SECTION 11 - SEPARATOR GRATES
• SECTION 12 - DISCHARGE BEATER AND GRATE
• SECTION 13 - CLEANING FAN
• SECTION 14 - CLEANING SHOE
• SECTION 15 - CLEAN GRAIN AND FILLING SYSTEM
• SECTION 16 - TAILINGS SYSTEM
• SECTION 17 - UNLOADING SYSTEM
• SECTION 18 - MAIN SHAFT
• SECTION 19 - HYDROSTATIC SYSTEM
  • Series 90 Hydrostatic System Diagnostics
  • Case Pressure Testing (Motor and Pump limits)
  • Charge Pressure and Inlet Vacuum Calibration
  • High Pressure Relief Valve and Multi-function Valve Settings
• SECTION 20 - TRANSMISSION
• SECTION 21 - POWERED REAR AXLE
• SECTION 22 - FINAL DRIVES
• SECTION 23 - BRAKES
• SECTION 24 - CYLINDERS
  • Disassembling the Master Cylinder (Style 1 Cessna / Style 2 New Holland)
  • Disassembling the Slave Cylinder (Style 1 Cessna / Style 2 New Holland)
  • Assembling and Installing the Cylinders
  • Leveling The Reel
  • Terrain Tracer (Lateral Float) Cylinders Overhaul

Professional Surgical Insight
When diagnosing the Series 90 Hydrostatic System (Section 19) on the TR combines, always verify that the motor case pressure does not exceed 75 psi (5.2 bar) cold or 40 psi (2.8 bar) continuous. If the pressure limiter engages prematurely, verify the multi-function valves, which are strictly calibrated to destroke the servos at 5510 psi (380 bar). For the Terrain Tracer and Reel Cylinders (Section 24), you must correctly identify whether the combine uses Style 1 (Cessna) or Style 2 (New Holland) cylinders before teardown, as their internal seal configurations are completely different. When servicing the Front Drum (Section 6), ensure the support arm shims are retained and reinstalled on the exact same side to prevent feeder chain tracking failures.