Part of the New Holland Repair Manuals.
Need the factory tear-down procedures for your New Holland 2450, 2550 Windrower? This 673-page New Holland 2450, 2550 repair manual pdf breaks down every hydrostatic drive component, electrical circuit, and engine assembly to get your machine cutting again. Inside, you get complete hydraulic schematics for the header drive, full wiring diagrams covering the Electronic Instrument Cluster, and step-by-step troubleshooting charts for the entire planetary final drive. Open up page after page of exploded view diagrams, engine overhaul procedures, and factory torque specifications. Dial in the charge pump relief setting to exactly 15.8 bar (230 PSI) and verify the A/C system is charged with 5.6 lbs of R134a refrigerant before heading back to the field. Your harvest window is too tight for guesswork. Download this bookmarked file right to your tablet, search for the exact spec you need, and fix it right the first time.
What's Inside This Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Electrical | 1-180 | Electrical System Components, Electronic Instrument Cluster (Eic Main Power Circuit, Ground Speed, Eic Display Scroll Main Power Circuit) |
| Hydraulic System | 181-270 | Header Drive, Header Lift, Hydraulic Header Tilt and Flotation Trim |
| Hydrostatic System | 271-374 | Hydrostatic Transmission, Minor Repairs, Major Repairs, Start-Up and Maintenance, Specifications, Authorized Service Centers - North America, Operation |
| Final Drives | 375-406 | Planetary Final Drive |
| Brake System | 407-420 | Parking Brake, Brakes |
| Engine | 421-610 | Engine Removal and Installation, Disassembly and Overhaul (Cylinder Head, Valves, And Related Parts, Cylinder Block, Specifications), Special Tools, Fuel & Induction System |
| Air Conditioning | 611-670 | Introduction, Air Conditioning Process, System Components - Description and Operation |
Every system also includes an index and labor guide.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Charge Pump Relief Setting | 15.8 bar (230 PSI) | p. 369 |
| Refrigerant Type and Quantity | 5.6 lbs R134a | p. 627 |




















