Part of the New Holland Repair Manuals.
Need the factory book for your New Holland H6730, H6740, or H6750 disc mower? This 146-page service manual covers the full family, driveline to cutter bar. Inside you get hydraulic cylinder disassembly and rebuild procedures, a complete driveline section spanning the Twist Lock, overrunning clutch, U-joints, and bevel gearbox, plus exploded parts views and a full torque chart to back every reassembly step. Set the lift cylinder piston rod locknut to 163-176 N⋅m (120-130 lb ft), and if you're chasing a cylinder that won't hold under load, check the inlet port orifice plate against the 0.040 in spec before you start swapping seals. No more eyeballing hitch pin height or guessing knife kit compatibility off a parts counter guy's memory. It's bookmarked by section, so you can jump straight from the cutter bar to the decal charts without scrolling. Download it, load it on your phone, and get back under the mower.
What's Inside This New Holland H6730, H6740, H6750 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 3-54 | Precautionary Statements, Before Using the New Machine, After 8 Hours of Operation, Tractor Requirements, Attaching the Mower to the Tractor |
| Hydraulics | 55-60 | Hydraulic Cylinders, Disassembly, Inspection, Assembly |
| Drivelines | 61-130 | Twist Lock, Overrunning Clutch, U-Joints, Belt Tension Jackshaft, Bevel Gearbox, Cutter Bar |
| Optional Equipment | 131-136 | Left Swathboard Kit, High Stubble Kit, 7 Degree Twist Knives, 14 Degree Twist Knives, Serrated 14 Degree Twist Knives, V Knives |
| Decals | 137-146 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Lift cylinder piston rod locknut torque | 163 - 176 N⋅m (120 - 130 lb ft) | p. 58 |
| Lift cylinder inlet port orifice plate size | 0.040 in | p. 56 |
| General instruction for oil leaks | Any leak should be fixed immediately | p. 36 |
| Cutting Height | 32 mm - 89 mm (1.25 in - 3.5 in) | p. 21 |
| Knives Per Discs | 2 | p. 21 |
| Disc Cutting Diameter | 500 mm (19.7 in) | p. 21 |
| Disc Speed | 3000 rpm | p. 21 |
| H6730 | ||
| Limit chain adjustment (hitch pins from ground, standard operation), H6730 | as close to (but not less than) 609 mm (24 in) | p. 9 |
| PTO HP Required (minimum), H6730 | 45 | p. 21 |
| H6740, H6750 | ||
| Limit chain adjustment (hitch pins from ground, standard operation) (H6740, H6750) | as close to (but not less than) 457 mm (18 in) | p. 15 |
| Clearance between outside edge of tractor tire and mower inner shield (for hex-shaped lower lift pins adjustment) | 102 mm (4 in) | p. 11 |
| H6740 | ||
| PTO HP Required (minimum), H6740 | 55 | p. 21 |
