Part of the New Holland Repair Manuals.
This is the factory repair manual for the New Holland TR89 and TR99 twin-rotor combines. It is split into five sections that follow the machine: the electrical system, which is the largest and runs from page 2 to page 389 with schematics and connector views, the hydraulic and hydrostatic systems, the drive systems, the feeding and threshing components, and clean grain handling. The hydraulic section carries the numbers a real diagnosis needs, including the priority and secondary system pressures and where to check each of them.
What's Inside This New Holland TR89, TR99 Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Electrical System | 2-389 | Wiring Schematics and Harness Routing, Connector Views, Fuses and Relays, Charging and Starting Circuits, Monitors and Sensors, Lighting, Circuit Fault Finding |
| Hydraulic and Hydrostatic Systems | 390-661 | Main Pump and Flow Divider, Priority Steering Circuit and Secondary Function Circuit, Relief Valve Pressures and How to Check Them, Hydrostatic Pump and Motor, Case Drain and Oil Cooler Circuit, Reel and Header Lift Valves, Valve Overhaul |
| Drive Systems | 662-980 | Engine Drive and Belt Layouts, Hydrostatic Ground Drive, Final Drives and Axles, Variable Speed Drives, Gearboxes, Drive Shaft and Bearing Service |
| Feeding and Threshing Components | 981-1180 | Header and Feeder House, Twin-Rotor Threshing and Separation, Concaves and Rotor Speed, Beater and Discharge Beater, Straw Chopper and Residue Handling |
| Clean Grain Handling | 1181-1298 | Cleaning Shoe, Sieves and Chaffer, Cleaning Fan, Clean Grain and Tailings Elevators, Grain Tank and Unloading Auger |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Priority (steering) circuit | ||
| System pressure, Priority (steering) circuit | 138 bar +7/-0 (2000 PSI +100/-0), relief valve not adjustable | |
| Secondary circuit (all functions except steering) | ||
| System pressure, Secondary circuit (all functions except steering) | 155 bar +7/-0 (2250 PSI +100/-0), relief valve not adjustable | |
| Main hydraulic system | ||
| Flow divider, steering / electrohydraulic split | 15 L/min (4 GPM) / up to 53 L/min (14 GPM) | |
| Hydrostatic pump and motor | ||
| Case drain flow | Up to 26.5 L/min (7 GPM) through the oil cooler circuit | |
| Oil cooler circuit | ||
| Check valve | 15 PSI | |
| Secondary circuit | ||
| Secondary circuit test point | Reel lift quick coupler | |
| TR89 / TR99 | ||
| Threshing type | Twin rotor axial-flow | |
