Part of the New Holland Repair Manuals.
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 442–465 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 |
