Part of the New Holland Repair Manuals.
You are up on the knotter deck with a twine end in one hand and an untied bale in the chamber, and what you need is a number, not a theory. The Knotter section of this New Holland BB9090 service manual gives the brake spring length, the needle timing gaps and the torque for the frame bolts.
It runs 701 pages, publication 87749049B, covering the BB9090 large rectangular baler across ten sections: General Information, Electrical System, Hydraulic System, Powertrain, Mainframe, Pickup and Cutter, Feeder and Plunger, Knotter, Specifications and Optional Equipment. You get teardown and assembly procedures, sensor troubleshooting, hydraulic circuits, clutch and flywheel service, and the spec tables for the 3x3, 3x4 and 4x4 balers.
A baler down mid-cutting costs you the hay, not just the afternoon. Download the PDF, print the section you are working in, and let those pages take chaff and grease at the bench until the baler is back in the field.
What's Inside This New Holland BB9090 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 6-31 | Baler Components (Outside View - Left Side, Outside View - Right Side, Baler Right-Hand Side View, Baler Left-Hand Side View) |
| Electrical System | 32-125 | Troubleshooting, Sensors, Electrical Circuits, Console General Information |
| Hydraulic System | 126-163 | Bale Density Circuit, Control Valves, Cylinders |
| Powertrain | 164-253 | Tractor Hitch Dimensions, Connect to Tractor, Flywheel Brake, Implement Driveline, Main Drive Clutch |
| Mainframe | 254-279 | Wheel Bearing and Axle Shaft, Axle Frame Group, Brakes |
| Pickup and Cutter | 280-339 | Augers, Reel, Optional Cutter |
| Feeder and Plunger | 340-439 | Packer, Stuffer, Charge Chamber |
| Knotter | 440-637 | Twine Installation, General Maintenance, Twine Tensioners, Knotter Assembly |
| Specifications | 638-677 | 4x4 Baler, 3x4 Baler, 3x3 Baler, 70x120 Baler, 70x80 Baler |
| Optional Equipment | 678-701 | Bale Accumulator, Bale Chute |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Pickup slip clutch torque | 565 Nm (417 lbf ft) | p. 287 |
| Pickup clutch spring length | 30 mm (1-1/8 in) | p. 287 |
| Cam bearing top lock nut torque | 115 Nm (85 lbf ft) | p. 303 |
| Plunger roller cap screw torque | 285 Nm (210 lbf ft) | p. 423 |
| Stake nut torque | 203 to 237 Nm (150 to 175 lbf ft) | p. 428 |
| Maximum permitted end play in worm gear shaft | .2 to .45 mm (.008 to .018 in) | p. 499 |
| Needle actuating rod beginning length | 1283 mm (50.5 in) | p. 501 |
| Baler Control Valve Pressure Relief Valve | 200 bar (2900 psi) | p. 132 |
| Pickup Lift Cylinder Clevis Pin Nut Torque | 59 Nm (44 lb ft) | p. 157 |
| Bale Density Cylinder Tie Rod Nut Torque | 95 Nm (70 lb ft) | p. 157 |
| Flywheel Shearbolt Nut Torque | 61 Nm (45 lbf ft) | p. 218 |
| Main Drive Clutch Spring Length | 73 mm (2-7/8 in) | p. 210 |
