Part of the New Holland Repair Manuals.
One book settles what these balers actually require: the 422-page New Holland service manual covering the 630, 640, 650, and 660 round balers, the same New Holland 660 service manual PDF a dealer tech pulls when your net wrap quits mid-field. Wiring diagrams for the Bale Command electrical system back up a full troubleshooting section, and the twine and net wrapper chapters carry each wrapping cycle through adjustment, knife service, and repair. Apron belt failure analysis shows why a belt let go and how to relace it; the hydraulic section runs the tailgate lift and belt tension circuits through relief valve checks. Set pickup drive idler sag between 3/16 and 1/2 inch, then torque the cam bearing locknut to 83 ft. lbs. (113 N-m). A guessed slip clutch setting can cost you a gearbox, not an afternoon. Bookmarked and text-searchable, this PDF keeps the right figure in front of you while the windrow waits.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 3-20 | Precautionary Statements, Safety Decals, Basic Components, Hardware |
| PTO Driveline | 21-40 | Model 630 PTO, Models 640, 650, 660 PTO, Slide Collar Quick-Disconnect |
| Gearbox Removal | 41-60 | Removing the Gearbox, Rebuilding the Gearbox, Gearbox Installation |
| Standard and Wide Pickups | 61-84 | Standard Pickup, Wide Pickup |
| Slip Clutches | 85-108 | Main Drive Slip Clutch, Floor Roll Drive Clutch, Sledge Roll Drive Clutch |
| Floor Roll and Starter Roll Group | 109-128 | Floor Roll Removal, Starter Roll Model 630, Starter Roll Models 640, 650, 660 |
| Apron Roll Group | 129-164 | Releasing Belt Tension, Drive Roll Removal, Apron Drive Roll Declutch |
| Apron Belts | 165-188 | Belt Failure Analysis, Repairing Belt Lacing, Endless Belts |
| Sledge Roll Group | 189-236 | Follower Roll, Stripper Roll and Middle Roll, Pivot Roll and Sledge Assembly |
| Hydraulic System | 237-268 | Tailgate Lift System, Belt Tension System, Relief Valve |
| Twine Wrapper System - Model 630 | 269-276 | Adjustments, Drive Motor, Twine Arm Chain and Sprocket |
| Auto-Wrap Twine System - Models 640, 650, and 660 | 277-318 | Twine Wrapping Cycle, Twine Wrapper Adjustments, Twine Knives and Supports |
| Bale Command Mechanical System - Models 640, 650, and 660 | 319-378 | Twine Wrapping Cycle Operation, Twine Wrapper Adjustments, Net Wrapper |
| Bale Command Electrical System - Models 640, 650, and 660 | 379-422 | Components, Operation, Troubleshooting |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Minimum tightening torque for 1/4 inch SAE Grade 2 unplated/plated silver bolt | 55 inch pounds (6.2 Newton-metres) | p. 15 |
| Minimum tightening torque for M4 Class 5.8 unplated bolt | 15 inch pounds (1.7 Newton-metres) | p. 16 |
| Guard cap screw torque | 102 in. lbs. (12 N-m) | p. 62 |
| Cam bearing locknut torque | 83 ft. lbs. (113 N-m) | p. 62 |
| Pickup drive idler sag | 3/16" - 1/2" (5 mm - 13 mm) | p. 69 |
| Auger drive chain deflection | 3/16" - 3/4" (5 mm - 20 mm) | p. 71 |
| Drive chain 4 deflection | 1/8 inch - 1/4 inch (3 mm - 5 mm) | p. 118 |
| Drive chain 5 spring length | 1-5/8 inch (41 mm) | p. 118 |
| Tailgate opening distance for belt stop | 36 in (90 cm) | p. 142 |
| Head bore wear limit | 0.005 in. (0.127 mm) | p. 242 |
| Eccentric to breakaway arm clearance | 1/64 inch to 1/32 inch (0.4 mm to 1.6 mm) | p. 291 |
| Knife actuating rod spring length | 2-1/2 inch (64 mm) | p. 295 |
