Part of the New Holland Repair Manuals.
Reel hydraulics, feeder engagement, cutter control, and head and header drive: this 274-page New Holland DuraSwath service manual PDF, OEM 47528908, walks each of those circuits end to end across all four HB-series draper header models, 425HB through 440HB. Schematic frames map every hydraulic circuit from the main manifold outward, and the hydraulic and electrical sections together fill well over half the book. Harness and connector diagrams trace reel speed, feeding, and chopping control wiring down to the pin, while exploded views break the cutting mechanism and belt feed apart for clean reassembly. Check knife stroke against the 8.51 cm (3.35 in) factory figure before you blame the drive, then pull M24 Class 10.9 plated hardware to 1016 N·m. Misdiagnose one valve and you buy the manifold twice. Bookmarked and text-searchable, the PDF rides in the cab with you, so the spec is wherever the header is cutting.
Other edition of this manual
What's Inside This New Holland DuraSwath 425HB, DuraSwath 430HB, DuraSwath 436HB, DuraSwath 440HB Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 1-28 | Foreword, Safety Rules, General Specification |
| Hydraulic Systems | 29-120 | Component Localisation, Hydraulic Schematic Frames, Main Manifold Overview |
| Electrical Systems | 121-198 | Electrical System, Harnesses and Connectors, External Lighting, Reel Speed and Position Control, Feeding Control System, Chopping and Cutting Control Systems |
| Attachments/Headers | 199-274 | Attachment/Header Reel, Attachment/Header Cutting Mechanism, Belt Feeding, Foreword - Important Notice Regarding Equipment Servicing, Safety Rules |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Metric non-flanged hardware M4 Class 8.8 bolt and class 8 nut Unplated | 2.2 N·m | p. 14 |
| Metric non-flanged hardware M24 Class 10.9 bolt and class 10 nut Plated with ZnCr | 1016 N·m | p. 14 |
| Raptor™ draper belts | 1066 mm (42 in) | p. 23 |
| Draper belt speed range | 0 - 232 m/min (0 - 760 ft/min) | p. 23 |
| Knife stroke | 8.51 cm (3.35 in) | p. 23 |
| Reel drive motor displacement | 260.0 cm³ (15.9 in³) | p. 24 |
| Torque knife hardware | 10 N·m (89 lb in) | p. 228 |
| Torque all knife bolts | 8 - 11 N·m (71 - 97 lb in) | p. 234 |
| Optimum clearance between upper and lower ledger surfaces of sickle guard | 3.80 - 4.20 mm (0.15 - 0.17 in) | p. 225 |
| Sickle guard replacement clearance limit | 5.40 mm (0.21 in) | p. 225 |
| Torque sickle guard mounting bolts for cutterbar roller bearing | 50.2 N·m (37.0 lb ft) | p. 224 |
| Torque for knife bolts | 8 - 11 N·m (71 - 97 lb in) | p. 241 |
