When the twine wrapper on an 846 stops cycling with two fields of hay still down, there is no dealer counter to lean on, just you, the baler, and the weather report. This service manual covers the Sperry New Holland 846 and 847 round balers and walks through the repairs that get one turning again: the telescoping PTO drive and gearbox, pickup finger replacement, apron and floor chains, the twine wrapper clutch and worm gear, and the tailgate hydraulic cylinders.
Across its 58 pages you get factory disassembly and reassembly procedures with the numbers that matter, such as 45 to 55 ft. lbs. on the PTO input shaft set screws and hand-check deflection specs for the chains, plus a full specifications section.
It arrives as a PDF download the moment you order, prints clean for the shop bench, and it is bought once and yours to keep for this machine.
What's Inside This Sperry New Holland 846, 847 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 5 | Hardware Key, Tightening Torques |
| Safety | 6-7 | Personal Safety Precautions, Machine Safety Shields, Hydraulic Cylinder Lock-Outs, Bale Handling Safety |
| Drive System | 9-25 | Telescoping PTO Drive, Gearbox Input Drive Shaft, Gearbox, Floor Chain Drive Chain Adjustment (846 and 847) |
| Pickup Assembly | 26-28 | Pickup Finger Replacement, Cam Followers, Tooth Pipe Assembly, Pickup Removal, Pickup Adjustment |
| Apron Chain | 29-36 | Upper Idler Sprockets, Lower Take-Up-Arm Idlers |
| Floor Chains and Drive | 37-41 | Floor Chain Replacement, Floor Guide Channel and Floor Replacement, Floor Chain Drive Shaft Replacement |
| Automatic Twine Wrapper | 42-50 | Clutch and Worm Gear, Adjustments, Twine Tube Support |
| Hydraulic Cylinder | 51-53 | General Procedures, Tailgate Cylinders, Disassembly, Inspection, Assembly |
| Specifications | 54-55 | Overall Dimensions, Weight, Tractor Requirements, Bale Specifications, Drive Systems |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| PTO yoke set screws torque | 45 to 55 ft. lbs. (61 to 75 N·m) | p. 14 |
| Floor chain adjustment deflection | 3/16" to 3/8" (5-10 mm) | p. 37 |
| Model 846 floor chain drive chain deflection | 1" (25 mm) | p. 23 |
| Model 847 floor chain drive chain tension spring length | 11 1/2" (292 mm) | p. 23 |
| Pickup weight when lifted at wind guard cross tube | 30 lbs. (133 N) | p. 28 |
| Bale Weight | 450-850 lbs | p. 54 |
| Flotation Pick-up Tire Pressure | 15 psi | p. 55 |
| 846 | ||
| Model 846 Apron Chain Hardware Torque | 18-24 ft-lbs | p. 35 |
| 847 | ||
| Model 847 Apron Chain Hardware Torque | 31-37 ft-lbs | p. 35 |
Sperry New Holland 846, 847 Common Problems This Manual Covers
PTO driveline vibration and gearbox noise
A worn telescoping PTO drive or loose gearbox input shaft shows up as vibration and chatter under load. The Drive System section covers the telescoping PTO drive, input drive shaft, and gearbox teardown, including the 45 to 55 ft. lbs. torque on the input shaft set screws.
Manual Section: Drive System p. 9Broken or missing pickup fingers
Rocks and rough ground snap pickup fingers, leaving strips of hay behind the baler. The Pickup Assembly section covers finger replacement, cam followers, tooth pipe assembly, and pickup adjustment, including checking float at the wind guard cross tube.
Manual Section: Pickup Assembly p. 26Apron chain loose or jumping sprockets
A slack apron chain rides up the upper idler sprockets and can jump teeth, producing ragged, loose-cored bales. This section covers the upper idler sprockets and lower take-up-arm idlers, with model-specific hardware torques for the 846 and 847.
Manual Section: Apron Chain p. 29Floor chains out of adjustment
Floor chains that are too loose slip and feed unevenly, and worn links eventually break under a heavy bale. The manual gives the hand-pull adjustment check of 3/16 to 3/8 inch idler movement, plus floor chain, guide channel, floor, and drive shaft replacement.
Manual Section: Floor Chains and Drive p. 37Twine wrapper fails to trip or wrap
When the automatic twine wrapper will not cycle, bales come out unwrapped and fall apart on the loader spear. This section covers the wrapper clutch and worm gear, the twine tube support, and the adjustments that bring the cycle back into time.
Manual Section: Automatic Twine Wrapper p. 42Tailgate cylinders leaking or drifting down
Leaking tailgate cylinders let the gate creep down and make bale ejection sluggish, and a drifting tailgate is a safety hazard without the lock-outs in place. The Hydraulic Cylinder section covers disassembly, inspection, and assembly, including the 155 lb. ft. piston nut torque.
Manual Section: Hydraulic Cylinder p. 51Frequently Asked Questions
Which balers does this service manual cover?
It covers the Sperry New Holland 846 and 847 round balers. Where procedures differ between the two models, the manual gives separate values, for example distinct apron chain hardware torques and floor chain drive adjustments for the 846 and the 847. p. 54
Does it include torque specs and chain adjustments?
Yes. The Drive System section gives the PTO input shaft set screw torque of 45 to 55 ft. lbs., the Apron Chain section lists model-specific hardware torques, and the Floor Chains and Drive section gives the 3/16 to 3/8 inch hand-pull deflection check. p. 37
Will it help me rebuild the tailgate cylinders?
Yes. The Hydraulic Cylinder section covers general procedures for the tailgate cylinders: disassembly, inspection, and assembly, including the piston nut torque, so you can reseal a leaking cylinder in your own shop instead of sending it out. p. 51
How do I get the manual after paying?
It is a digital PDF download, available immediately after checkout. There is no shipping and no waiting; you can have it open on a phone or laptop next to the baler the same afternoon.
Will this Sperry New Holland 846 Service Manual download right away?
This is a 58-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Is printing allowed for this Sperry New Holland 846 Service 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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