Part of the New Holland Repair Manuals.
When the side draper walks off its rollers with dry wheat standing, the fix is the New Holland 840CD, 880CF service manual PDF: 427 pages of factory data for both draper header variants, OEM ID 47730915. Hydraulic schematics trace the reel vertical and fore-and-aft positioning circuits through the main control valve, and wiring diagrams map every harness and connector behind header leveling, reel speed, and the feeding control system. Attachment sections take up nearly half the book, running from reel removal and tine pitch adjustment through cutterbar rebuilds, retractable finger assemblies, and draper belt tracking. Set auger flighting 24 mm (0.9 in) off the header floor, hold knife head clearance at 2 mm, and torque the knife arm bolts to 136 N·m (100 lb ft). A half-stripped cutterbar is no place to hunt one number. Bookmarked and searchable by keyword, this PDF hands you that spec and gets your header cutting again.
What's Inside This New Holland 840CD, 880CF Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 1-33 | Safety Rules, Torque Data, Basic Instructions |
| Hydraulic Systems | 34-119 | General Specifications, Component Identification, Hydraulic Schematics |
| Electrical Systems | 120-199 | Electrical System (Harnesses and Connectors, Header Leveling Control, Reel Speed and Position Control, Feeding Control System) |
| Attachment/Header Support and Drives | 200-213 | PTO Shaft, Gearbox, Mechanical Drive System, Slip Clutch |
| Attachment/Header Reel | 214-231 | Reel Removal, Reel Installation, Tine Pitch Adjustment, Reel Arms |
| Attachment/Header Cutting Mechanism | 232-285 | Sickle Cutterbar, Center Knife Gearbox, Knife Guard, Crop Divider |
| Attachment/Header Feed Auger | 286-345 | Feed Auger, Auger Drive Chain, Retractable Finger Assembly, Flighting Clearance |
| Belt Feeding | 346-405 | Side Draper, Infeed Draper, Draper Belt, Roller Shaft, Tracking Adjustment |
| Product Feeding | 406-415 | Length-Of-Cut Gearbox |
| Platform, Cab, Bodywork, and Decals | 416-427 | Machine Shields and Guards, Foreword - Important Notice Regarding Equipment Servicing, Safety Rules - Ecology and the Environment, Safety Rules, Safety Rules - Personal Safety |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Knife arm bolt torque | 136 N·m (100 lb ft) | p. 243 |
| Knife head clearance | 2 mm | p. 243 |
| Knife section nut torque | 11.5 N·m (101.8 lb in) | p. 268 |
| Auger flighting to header floor clearance | 24 mm (0.9 in) | p. 289 |
| Auger finger path to header floor clearance | 24 mm (0.9 in) | p. 289 |
| Loctite 454 application amount | 1 ml (0.1 US fl oz) | p. 362 |
| Side draper roller seal installation depth | 2.5 - 3.5 mm (0.1 - 0.14 in) | p. 360 |
| Infeed draper roller bearing installation depth | 13.5 - 14.5 mm (0.5 - 0.6 in) | p. 360 |
| Side draper idler roller bolt torque | 95 N·m (70.1 lb ft) | p. 363 |
| M5 bolts and M5 lock nuts torque | 5.6 - 6.2 N·m (49.6 - 54.9 lb in) | p. 393 |
| Auger Speed (with 43-tooth sprocket) | 147 RPM | p. 26 |
| Auger Slip Clutch Setting | 1000 Nm | p. 26 |
New Holland 840CD, 880CF Common Problems This Manual Covers
New Holland 840CD 880CF draper feeds slow in green stem beans, material backs into feeder house
Check auger speed first: with the 43-tooth sprocket it should run 147 RPM, the spec on page 26. Then set auger flighting to floor clearance at 24 mm (0.9 in) following the procedure on page 289. Correct speed and tight clearance keep green stems moving into the feeder instead of piling ahead of it.
Manual Section: Attachment/Header Feed Auger p. 289Side draper belts stall or will not drive when feeding heavy crop in tough conditions
Test belt drive pressure at the relief valve; it should hold 17.2 MPa, listed on page 85. If pressure is good, work through the insufficient draper speed checks, then clean crop residue off the drive rollers and belt underside. A contaminated belt slips long before it looks worn.
Manual Section: Hydraulic SystemsCrop feeds unevenly across the width and heads bunch to one side of the infeed draper
Inspect the infeed draper belt for glazing and a worn V-guide, then check belt tracking using the adjustment procedures in the Belt Feeding section starting on page 346. When replacing rollers, torque the side draper idler roller bolts to 95 N·m (70.1 lb ft) and the drive roller set screws to 27 N·m (19.9 lb ft) per page 363.
Manual Section: Belt Feeding p. 363Sickle plugs in heavy crop and knife sections break or wear out fast
Replace cracked or rounded knife sections and torque the new nuts to 11.5 N·m (101.8 lb in) per page 268; tighten finger guard bolts to 43 N·m (32 lb ft). While the knife is out, set knife head clearance to 2 mm and torque the knife arm bolt to 136 N·m (100 lb ft), both on page 243.
Manual Section: Attachment/Header Cutting Mechanism p. 268Auger slip clutch chatters or slips and the header plugs in heavy crop
Verify the slip clutch setting at 1000 Nm, the spec on page 26, and inspect the friction plates for glazing or oil contamination. If the clutch checks out, the plugging is backfeeding: confirm auger speed at 147 RPM with the 43-tooth sprocket and set rear floor to auger flight clearance at 18.1 mm (0.7 in) per page 289.
Manual Section: Attachment/Header Support and Drives p. 26Frequently Asked Questions
What are the torque specifications for the knife drive on the New Holland 840CD/880CF header?
The M12 x 70 mm hex socket bolts used to install the knife arm must be torqued to 136 N·m (100 lb ft). p. 243
What is the capacity of the hydraulic reservoir integrated with the New Holland 840CD, 880CF draper header frame?
The hydraulic reservoir integrated with the draper header frame has a capacity of 90 liters (23.8 US gallons). p. 29
How do I check knife relief valve pressure in forward operation on a New Holland 840CD, 880CF and what's the spec?
Install a pressure check gauge in port P1D. Run the knife in forward and check the pressure. The relief pressure must be 23 MPa (3335 psi). p. 83
What is the required oil capacity for the center knife gearbox on the New Holland 840CD, 880CF?
The center knife gearbox has a capacity of 6.0 liters (1.6 US gallons) and requires NEW HOLLAND AMBRA HYPOIDE 90 oil. p. 30
What is the specified backlash for the pinion gear in the center knife gearbox?
The backlash on the tip of the pinion gear should measure between 0.2000 - 0.3000 mm (0.0079 - 0.0118 in). p. 257
What format is this New Holland 840CD manual in?
You get a 427-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Can I print just the pages I need from this New Holland 840CD manual?
You can. The PDF is unlocked and carries no copy protection, so print the sections you want and keep the file as your backup.
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