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This 94-page New Holland 462 Service Manual PDF (OEM #40044253) zeroes in on the 442, 452, 462, 463, and 465 Disc Mowers built between 1978 and 1993. Step-by-step procedures cover bevel gearbox removal, disassembly, and rebuilds. The guide details full cutter bar teardown and reassembly, jackshaft service, belt adjustments, and lubrication schedules. Assembly drawings of the gearbox and cutter bar accompany a torque reference table, fluid capacity charts, and a troubleshooting section addressing vibration, flotation problems, drive belt failure, and uneven stubble. For example, standard disc knife bolts require 55 ft. lbs. (74 N·m) of torque on the 442, 452, and 462 models. Download the bookmarked, searchable PDF directly to your phone or tablet and get the right spec at the machine.
What's Inside This New Holland 442 & variants Manual
| System | Pages | Key Topics |
|---|---|---|
| Section 0 | 3-8 | Precautionary Statements (Personal Safety, Machine Safety), Caution, Safety Decals |
| General Information | 9-18 | Tractor Requirements, Attaching the Mower to the Tractor, Lowering the Cutter Bar, Transporting the Mower, Removing the Mower From the Tractor, Storing the Mower, Disc Rotation |
| Adjustments | 19-28 | Belt Adjustments/Replacement, Breakaway Latch, Crop Divider, Cutter Bar Flotation, Cutting Height, Operating Recommendations, Adverse Field Conditions, Operating Suggestions |
| Bevel Gearbox | 29-50 | Assembly, Disassembly, Inspection and Cleaning, Installation, Lubrication, Removal |
| Cutter Bar | 51-76 | Assembly, Disassembly, Flotation, Inspection and Cleaning, Installation, Removal |
| Jackshaft | 77-78 | Disassembly, Assembly |
| Optional Equipmlnt | 83-84 | Converting A 442, 452, And 462 To Heavy Duty Discs, Heavy Duty Disc Kit, High Skid Shoes |
| Troubleshooting | 85-86 | Vibration, Cutter Bar Not Floating, Machine Breaking Back Too Easily, Difficulty in Obtaining Correct Angle on Cutter Bar, Poor Division Between Cut and Uncut Crop |
| Repair Time Schedule | 87-88 | Section 2 (Belt Adjustment, Belt Replacement, Adjust Breakaway Latch), Section 3 (R & R Bevel Gearbox, Rbld Bevel Gearbox) |
| Specifications | 89-94 | Number of Discs, Width of Cut, PTO Hp Required, Disc Speed, Weight, Transport Width, Lift System, Hardware |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Models 442, 452, 462 | ||
| Knife bolt torque (standard discs) | 55 ft. lbs. (74 N·m) | p. 53 |
| Knife bolt torque | 55 ft.lbs. (74 N·m) | p. 89 |
| Disc nut torque (standard discs) | 90 ft. lbs. (122 N·m) | p. 51 |
| All Models | ||
| Backlash between gears | 0.06" to 0.016" | p. 41 |
| R & R Bevel Gearbox | 2 Hrs | p. 49 |
| Rbld Bevel Gearbox | 1 Hr | p. 49 |
| Rebuild Cutterbar | 6.5 Hrs | p. 75 |
| Max knife bolt hole elongation | 0.078 inches (2mm) | p. 52 |
| Max knife bolt shoulder wear | 0.118 inches (3 mm) | p. 52 |
| Cutter bar assembly socket head bolt torque | 260 ft. lbs. (352 N-m) | p. 69 |
| Models 463, 465 | ||
| Disc nut torque (heavy duty discs) | 130 ft. lbs. (176 N·m) | p. 51 |
| Model 442 | ||
| Cutter bar oil capacity | 3 3/4 pints (1.75L) 59oz. | p. 80 |
New Holland 442 & variants Common Problems This Manual Covers
New Holland 442 disc mower stops cutting and makes grinding noises from the bevel gearbox area p. 41
Inspect the bevel gearbox components for wear or damage. Drain the fluid and check for metal shavings. Upon reassembly, verify the backlash between gears is 0.06 to 0.016 inches as shown on page 41. Fill the gearbox with exactly 1/2 pint of oil.
Manual Section: Bevel GearboxUneven cutting and excessive vibration coming from a single disc during field operation p. 52
Inspect the blade carriers and knives for damage or wear. Measure the knife bolt holes on page 52; replace the disc if elongation exceeds 0.078 inches (2mm). For standard discs on models 442, 452, and 462, torque the knife bolts to 55 ft. lbs. (74 N·m).
Manual Section: Cutter BarOverheating cutterbar or fluid leaks observed around the base of the disc drive modules p. 69
Check the cutterbar assembly for damaged seals or loose hardware. Torque the cutter bar assembly socket head bolts to 260 ft. lbs. (352 N-m) following the instructions on page 69. Clean the housing and verify fluid levels match the specific capacity for your machine.
Manual Section: Cutter BarDrive belts slipping under load or snapping prematurely during heavy crop cutting p. 85
Inspect the sheaves for incorrect alignment or debris buildup. Adjust the belt tension according to the procedure on page 19, so that a deflection force of 20 lbs deflects the belts 3/4 inch. Verify the PTO is operating at 540 RPM.
Manual Section: TroubleshootingFrequently Asked Questions
What are the torque specs for the blade bolts or gearbox bolts on a New Holland 462/463 mower?
For Models 463 and 465 with heavy duty discs, the knife bolts should be tightened to 65 ft. lbs. (88 N·m). The disc nuts for these models should be torqued to 130 ft. lbs. (176 N·m). Additionally, the socket head bolts for the cutter bar assembly should be tightened in increments to 260 ft. lbs. (352 N-m).
How do I replace blades on a New Holland 452 or 465 disc mower?
To replace a knife, remove the dirt around the nut at point A and then remove the nut using a socket wrench. For Models 463 and 465 with heavy duty discs, tighten the knife bolts to 65 ft. lbs. (88 N·m). Knives can also be turned over to use the opposite cutting edge if they become dull or nicked.
How to reset New Holland 442 disc mower
To reset the cutter bar after the breakaway latch releases, back the mower until the cutter bar is in the normal position. Do not raise the cutter bar to relatch the breakaway. The latch is set at the factory and should be checked for rust before use.
How to reset New Holland 452 disc mower
To reset the cutter bar after the breakaway latch releases, back the mower until the cutter bar is in the normal position. Do not raise the cutter bar to relatch the breakaway. The latch is set at the factory and should be checked for rust before use.
How to reset New Holland 462 disc mower
To reset the cutter bar after the breakaway latch releases, back the mower until the cutter bar is in the normal position. Do not raise the cutter bar to relatch the breakaway. The latch is set at the factory and should be checked for rust before use.
What format is this New Holland 442 & variants manual in?
Instant PDF download. You get the full 94-page searchable Service Manual immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Is this New Holland 442 & variants Service Manual printable?
None at all, the PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
Document Quality
This document is a high-quality scanned PDF, allowing you to search and copy the full text thanks to an accurate OCR layer. All text throughout the manual is crisp and easy to read, with no blurriness or fading. Diagrams and illustrations are clear raster images or photos, and all labels within them are perfectly legible. The pages are consistently clean, free from any scan artifacts, stains, or skewed content. You will find several blank pages at the end of some sections and at the very end of the document.
