From the PTO driveline through the main and reversing gearboxes, feedrolls, cutterhead, blower, and metal detector, this 150-page Sperry New Holland 782 service manual PDF (OEM ID 40078211) walks the whole harvester end to end. Factory wiring diagrams trace the limit switches, gearbox shift motor, neutral block, and spout control circuits, while the metal detector gets a troubleshooting section that takes up roughly a quarter of the book. Each gearbox procedure runs from removal through reassembly, with an optional equipment chapter covering the automatic hitch and hydraulic spout control. Check the smooth roll against its .030 inch (.76 mm) wear limit, and set main gearbox bearing preload at 12 to 18 inch-pounds on reassembly. Second cutting won't wait while the chopper sits. Bookmarked and text-searchable, the PDF lets you confirm what's worn before you call the dealer, so the parts you order show up right the first time.
What's Inside This Sperry New Holland 782 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 1-3 | Specifications, Weight, Dimensions, Power Source Requirements, Conversion Tables, Torque Data |
| Safety | 4-5 | - |
| PTO Driveline | 6-10 | Front PTO, Universal Joints, Nylon Slide Bushings, PTO Phasing |
| Main Drive Gearbox | 11-22 | PTO Drive, Blower Drive Belts, Cutterhead Drive Shaft, Reversing Gearbox, Output Assembly, Input Shaft |
| Reversing Gearbox | 23-44 | Input Shaft, Output Shaft, Clutch Assembly, Shifter Fork, Forward Idler Gear, Drive Sheave |
| Feedrolls and Smooth Roll | 45-60 | Feedrolls, Smooth Roll, Reversing Gearbox, Shear Bar, Scraper, Metal Detector |
| Cutterhead | 61-70 | Knives, Safety Shield, Cross Auger Drive Chain, Recutter Screen, Cutterhead Bearing Housing, Cutterhead Stub Shaft |
| Blower | 71-82 | Removal, Assembly |
| Electric Controls | 83-86 | Limit Switches, Gearbox Motor, Neutral Block, Shifter Shaft, Wiring Diagram, Spout Control Motor |
| Metal Detector | 87-100 | Normal System Operation, Adjustments, Component Service |
| Troubleshooting | 101-132 | Electronic Metal Detector, Testing Procedures, Base Unit |
| Optional Equipment | 133-147 | Automatic Hitch, Blower Slow-Down Sheave, Horizontal Axle Extensions, Vertical Wheel Extension, Hydraulic Spout Control, Spout Liner |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Compressed air pressure | 35 PSI (2.4 BAR) | p. 5 |
| bearing preload torque | 12-18 in. lbs. (1.36 N·m to 2 N·m) | p. 18 |
| Input shaft bearing preload | 10 in. lbs. | p. 39 |
| Smooth roll wear replacement limit | .030" (.76 mm) | p. 54 |
| Tightening torque for special stainless steel cap screws | 25 ft. lbs. | p. 97 |
| Blower Speed | 1000 RPM | p. 141 |
| Deflector Motor Weight | 10 lbs. | p. 142 |
| Total System Weight | 100 lbs. | p. 142 |
| Blower Drive Belt Tension | 25 lbs. | p. 81 |
| Cutterhead Rolling Torque | 6-11 in. lbs. | p. 67 |
Sperry New Holland 782 Common Problems This Manual Covers
Sperry New Holland 782 quits feeding in heavy crop, material regurgitates around the feed rolls
Check the smooth roll for trueness with a straight edge and replace it if any spot is worn more than .030 inch (.76 mm) deeper than another spot, page 54. Worn rolls quit gripping the mat and let crop wash back. Feedroll removal and installation start on page 45; upper rolls swap out in about a half hour.
Manual Section: Feedrolls and Smooth Roll p. 54Shear bolts break repeatedly when the cutterhead loads up in thick or wet crop
Inspect the cutterhead bearings before blaming the bolts; drag anywhere in the drive multiplies shock loads. Add or remove shims equally at the bearing mounts until rolling torque measures 6-11 in. lbs. (.7-1.2 N·m), page 67. Then ease off ground speed in heavy windrows; the bolts are doing their job when the mat overloads the drum.
Manual Section: Cutterhead p. 67Metal detector trips constantly with no metal in the crop and won't stay reset
Test the system using the troubleshooting procedures starting on page 101: run the voltage, trip, reset, sensitivity, and noise checks in that order before condemning components. If the sensor roll was serviced, torque the special stainless steel cap screws to 25 ft. lbs. in a cross pattern, page 97, so the hubs stay square with the sensor roll.
Manual Section: Electronic Metal Detector p. 101Blower loses blowing action, chopped crop dribbles from the spout in heavy silage
Check blower drive belt tension first: tighten the idler and mounting bolt until you get 3/8 inch (9.6 mm) deflection with 25 lbs. (111 N) pull at mid-span, page 81. A slipping belt kills spout velocity long before the paddles wear out. Clean crop buildup off the sheaves and verify alignment while the shields are open.
Manual Section: Blower p. 81Reverser won't back plugged crop out of the feed rolls when clearing the machine
Check the reversing gearbox drive belt before pulling the gearbox: tighten the idler with its mounting bolt to get 1 inch (25 mm) of deflection with 60 lbs. (267 N) pull at center span, page 44. A loose belt slips under reverse load and the rolls never turn. Full gearbox removal and disassembly start on page 23.
Manual Section: Reversing Gearbox p. 44Frequently Asked Questions
What are the replacement specifications for the smooth roll on a Sperry New Holland 782?
The smooth roll should be checked for trueness with a straight edge and must be replaced if any spot on the roll is worn more than .030 inch (.76 mm) deeper than another spot on the roll. p. 54
What is the correct tension for the blower drive belt?
The blower drive belt should be tensioned to obtain a 3/8 inch (9.6 mm) deflection with 25 lbs. (111 N) of pull at the mid-span of the belt. p. 81
What is the required rolling torque for the cutterhead bearings on a Sperry New Holland 782?
After installing the cutterhead bearing housing and shims, the rolling torque of the cutterhead should be adjusted to 6-11 in. lbs. (.7 N·m - 1.2 N·m). p. 67
What is the correct procedure for setting the blower paddle clearance on a Sperry New Holland 782?
The blower paddle clearance should be adjusted so that with a paddle straight down, the clearance between the paddle and the blower band is 1/32 inch to 1/16 inch (.8 mm to 1.6 mm). After setting the clearance, the blower paddle bolts must be torqued to 100 ft. lbs. p. 79
What format is this Sperry New Holland 782 manual in?
This is a 150-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.
Am I able to print pages from this Sperry New Holland 782 manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
Is there a wiring diagram in this Sperry New Holland 782 Service Manual?
Complete wiring diagrams are included, covering all electrical circuits, harness routing, and connector pinouts for the Sperry New Holland 782. Page 85 carries one of them.
Reviews
There are no reviews yet.