Part of the New Holland Repair Manuals.
Driveline, brakes, hydraulics, frame, electrical, and the full feeding and pressing systems: this New Holland BR740A, BR750A repair manual PDF walks each one end to end, 972 pages under factory publication 604.66.241.00, covering both round balers in stuffer and rotor configurations. Wiring diagrams trace the Bale Command Plus harnesses connector by connector, with component tests for the lights and sensors behind them. Product feeding and pressing, from wide pickup and stuffer through belt rolls, sledge assembly, and the net and twine wrappers, fills nearly half the book on its own. Before the wheels go back on, torque the lug nuts to 380 Nm (280 ft. lbs.); when your belts slip, check the drive roll chain tension spring against the 406 mm (16 in.) spec. Every hour the baler sits, the windrow cures past prime. Print the pages the job calls for and let them get greasy; the bookmarked, keyword searchable file stays clean on your computer.
What's Inside This New Holland BR740A, BR750A Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction and Safety | 4-15 | Service Methods, Repair Procedures, Troubleshooting, Precautionary Statements, Personal and Machine Safety, Fluid Safety, Safety Decals, Information Decals |
| Torque, Hardware and Reference Data | 16-31 | Torques and Adjustments, Wheel Bolts, Tire Pressure, Hardware Torque, Locknuts and Jam Nuts, Retaining Compounds and Sealants, Standard Torque Data for Hydraulic Tubes and Fittings, Recommended Lubricants, Roller Chain Wear Limits, Conversion Charts |
| Baler Components and Power Flow | 32-36 | Drive Shaft, Gearbox, Pickup, Floor Roll, Sledge/Pivot Arm, Belts, Power Flow with Stuffer, Power Flow with Rotor, Driveline with Wide Pickup |
| Specifications | 37-41 | Overall Dimensions, Weights, Tires, Driveline, Tractor Requirement, Bale Size |
| Implement Driveline | 45-136 | PTO Driveline, Gearbox, Clutches, Drives, Gearbox Output Driveshaft |
| Brakes | 137-194 | Brake Drum, Brake Shoes, Brake Cylinder, Parking Brakes, Hydraulic Brakes |
| Hydraulics | 195-254 | Tailgate Lift System, Belt Tension System, Pickup Lift Cylinder, Rotor Circuit |
| Frame | 255-332 | Tailgate Replacement, High Hitch, Axles and Wheels |
| Electrical Systems | 333-502 | General Information, Harness and Connectors, Components, Bale Command Monitor |
| Product Feeding | 503-654 | Wide Pickup, Narrow Pickup, Stuffer, Rotor, Feeding Drives |
| Pressing | 655-838 | Belt Tension System, Belt Rolls, Sledge Assembly, Bale Chamber, Density Control |
| Wrapping | 839-972 | Net Wrapper, Twine Wrapper, Wrap Drives, Cutting Knife |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| wheel lug bolts torque | 156 Nm (115 ft.-lbs.) | p. 40 |
| wheel lug nuts torque | 380 Nm (280 ft.-lbs.) | p. 40 |
| Belt drive roll drive chain spring length | 406 mm (16 in.) | p. 41 |
| Starter roll drive chain spring length | 188 mm (7-9/16 in.) | p. 41 |
| Piston nut torque | 129 to 142 Nm (95 to 105 ft. lbs.) | p. 216 |
| Bearing nut torque | 81 to 108 Nm (60 to 80 ft. lbs.) | p. 216 |
| Pickup guard self tapping screw torque | 15 to 18 Nm (133 to 159 in.-lbs.) | p. 513 |
| Cam follower bearing locknut torque | 61 Nm (45 ft.-lbs.) | p. 516 |
| Rotor fingers straightness clearance | 15 mm | p. 617 |
| Drive chain deflection | 0 to 16 mm (0 to 5/8 inch) | p. 622 |
| Knife spring length | 289 to 295 mm (11-3/8 to 11-5/8") | p. 847 |
| Brake spring length | 119 to 123 mm (4-11/16 to 4-27/32") | p. 847 |
New Holland BR740A, BR750A Common Problems This Manual Covers
New Holland BR740A PTO shaft vibrates and CV joint fails after short service life
Inspect the driveline for worn CV joint yokes and check shaft phasing following the Section 31 service procedures starting. Verify the PTO connection bolts on the gearbox are torqued to 142 Nm per the chart on page 16, and confirm gearbox oil is at 0.65 L before returning to the field.
Manual Section: Section 31: Implement Driveline p. 45Net and twine actuators will not drop at wrap start, monitor shows actuator error
Check power and connections at the operator's panel using the Bale Command Plus troubleshooting steps. Test actuator wiring for corrosion after winter storage. Measure duckbill spring length, 384 to 390 mm, and set the duckbill insert clearance to 2 mm at the mechanical stop, following the procedure on page 872.
Manual Section: Bale Command Plus Electrical System TroubleshootingBelts run off to one side or break at the splice, bales come out misshapen
Check belt condition and splice fasteners first, then verify all belts match; five foot chambers take 8712 mm (343 inch) belts per the chart on page 672. Test tension system pressure against the 1200 to 2500 PSI range listed on page 38, and inspect idler and roll bearings for play before rethreading.
Manual Section: Section 60-62: Product Feeding and Pressing p. 672Pickup misses crop and feeds unevenly, teeth bent or missing across the reel
Replace bent or missing pickup fingers and torque them to 15 Nm using the chart on page 16. Torque pickup guard self tapping screws to 15 to 18 Nm per page 513. Spin the reel and listen for a rough cam follower bearing; when replacing it, tighten the locknut to 61 Nm as shown on page 516.
Manual Section: Section 60-62: Product Feeding and Pressing p. 513Twine trails off finished bales, knife does not cut cleanly at end of wrap
Inspect the twine cutting knife for nicks and dull edges, then replace it if worn. Measure the knife spring at 289 to 295 mm (11-3/8 to 11-5/8 inch) and adjust it to the settings on page 847. Clean built up hay off the knife arm pivot so the arm swings freely on the wrap cycle.
Manual Section: Section 60-62: Product Feeding and Pressing p. 847Frequently Asked Questions
What are the torque specifications for the wheel bolts on a BR740A baler?
The torque specification for the wheel bolts on a BR740A baler is 156 Nm (115 ft.-lbs.) for the 19/45-17 tire size. p. 16
How do I clear actuator error codes on a BR740/BR750 monitor?
An 'Er 1' error code indicates that the net or twine actuator stalled for 5 seconds or more. This error code and the alarm will clear themselves automatically after 10 seconds. p. 456
What are the replacement specifications for pickup teeth or tines on a New Holland BR740A, BR750A round baler?
To install the pickup guard, start the self-tapping screws by hand. Hold the guard square to the frame to keep an even spacing between guards, and tighten the screws to 15 to 18 Nm (133 to 159 in.-lbs.). p. 513
What is the torque specification for the cam follower bearing on a New Holland BR740A, BR750A round baler?
The torque specification for the cam follower bearing is 61 Nm (45 ft.-lbs.). p. 16
What is the gearbox oil capacity for the BR740A and BR750A?
The gearbox oil capacity for the BR740A and BR750A is 0.65 liters (22 oz.). p. 68
Will this New Holland BR740A Repair Manual download right away?
A 972-page Repair Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
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Print away. There is no DRM and no page limit. Many buyers print one chapter at a time and leave the rest on a tablet.
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