Part of the New Holland Repair Manuals.
Knife register, wobble box, feed auger flighting clearance: this New Holland 740CF, 800C service manual PDF settles those questions across 396 pages of factory data for the 740CF Super Flex and 800C auger headers, OEM 47627581. Electrical work claims the largest share of the book: wiring diagrams, harness and connector pinouts, and the reel speed and position circuits that decide whether your header answers the cab controls. Hydraulic schematics trace both reel positioning circuits, vertical and fore-and-aft, and the cutting mechanism chapters take the sickle cutterbar, knife drive belt, and hold-down clips from teardown through adjustment. Torque the knife drive shaft nut to 299.6 N·m (221 lb ft) and set the header height sensor lock nut at 1.35 N·m before you condemn the sensor. It's you, the header, and nobody to ask. Download the bookmarked, text-searchable PDF and print the pages for the job; they can take grease on the bench while the weather holds.
What's Inside This New Holland 740CF Super Flex, 800C Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 1-50 | Basic Instructions - Important Notice Regarding Equipment Servicing, Personal Safety, Safety Rules - Ecology and the Environment, Safety Rules |
| Main Gearbox and Drive | 51-64 | Power Take-Off Shaft, Main Gearbox and Drive Service |
| Clutch | 65-76 | Slip Clutch or Flywheel Damper |
| Hydraulic Systems | 77-110 | Reel Vertical Positioning System, Reel Fore-And-Aft Positioning System |
| Electrical Systems | 111-206 | Electrical System, Hydraulic System Control, Harnesses and Connectors, External Lighting, Feeding Control System, Cab Header Controls, Reel Speed and Position Control |
| Attachment/Header Reel | 207-220 | Reel Removal, Reel Installation, Reel Arm Removal, Reel Arm Installation, Exploded View |
| Attachment/Header Reel Control System | 221-236 | Reel Drive System, Drive Chain Adjustment, Drive Sprocket Removal, Drive Sprocket Installation, Reel Drive Motor Mount Replacement |
| Attachment/Header Cutting Mechanism | 237-306 | Wobble Box, Knife Drive Belt, Sickle Cutterbar, Hold-Down Clips, Finger Guard, Knife Register |
| Attachment/Header Feed Auger | 307-346 | Feed Auger Flighting Clearance, Feed Auger Drive Chain, Retractable Finger Assembly, Auger Removal, Auger Installation |
| Attachment/Header Frame | 347-372 | A-Frame Removal, A-Frame Installation, Crop Divider Removal, Crop Divider Installation, Long Divider |
| Platform, Cab, Bodywork, and Decals | 373-396 | Machine Shields and Guards, Decals and Plates, Fenders and Guards |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| M4 Metric Non-Flanged Hardware Class 8.8 Bolt and Class 8 Nut Unplated | 2.2 N·m (19 lb in) | p. 35 |
| M5 Metric Non-Flanged Hardware Class 8.8 Bolt and Class 8 Nut Unplated | 4.5 N·m (40 lb in) | p. 35 |
| Mounting torque | 1.35 N·m (12 lb in) | p. 175 |
| Header height sensor lock nut torque | 1.35 N·m (11.9 lb in) | p. 186 |
| Knife drive shaft nut torque | 299.6 N·m (221 lb ft) | p. 282 |
| M12 knife assembly bolt torque | 127 - 155 N·m (93.7 - 114.3 lb ft) | p. 282 |
| Maximum operating slope | 26% | p. 9 |
| Flex solenoid nominal voltage | 12 V | p. 81 |
| Flex solenoid power consumption | 18 W | p. 81 |
| Hydraulic fluid pressure switch installation torque | 20 N·m | p. 139 |
| Height sensor resistance | 1000 Ω | p. 175 |
| Reel position sensor mounting bolt torque | 2 N·m | p. 197 |
