Part of the New Holland Repair Manuals.
Need the factory teardown specs for your harvester? This 58-page New Holland 718 Service Manual PDF (OEM #40071810) breaks down the complete main drive gearbox, PTO slip clutch, and cutterhead area. Open up a full troubleshooting section covering the base unit and sickle bar attachments, plus high-quality exploded views of the clutch discs and plates. You get step-by-step procedures for resetting knives and replacing the shear bar to get your equipment chopping perfectly again. Press the new idler shaft until the edge of the snap ring land sits exactly 1.197 inches from the gearbox housing, then adjust the reversing gearbox drive belt to 60-65 lbs of deflection tension. Stop wasting time on trial and error in the field. This bookmarked file opens directly on your phone so you can find the spec, grab a wrench, and get back to work.
What's Inside This New Holland 718 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 4-5 | |
| Hardware Key and Torque Chart | 6 | Cap Screw Grade Identification Marks, Standard Tightening Torque, Sae Grade Identification, Astm Grade Identification |
| PTO and Slip Clutch | 7-12 | Introduction, Servicing, Breakaway Torque, Clutch Adjustment, Main Drive Slip Clutch Exploded View, Clutch Discs and Plates |
| Main Drive Gearbox | 13-20 | PTO Front Tower, PTO Assembly, Slip Clutch Assembly, Cutterhead Assembly, Snap Ring, Gearbox Mounting Bolts, Reversing Gearbox Drive Belt |
| Reversing Gear Box | 21-26 | Reversing Gearbox, Reversing Gearbox Drive Belts, Change Sprockets |
| Cutterhead Area | 27-32 | Introduction, Changing Number of Knives, Knife Sharpening Stone, Knife Resetting or Installing New Knives, Shear Bar Removal and Replacement, Housing Band Clearance |
| Electric Controls | 33-36 | Introduction, Remote Control Box, Switch Block Adjustment, Lubricants, Changing System Polarity, 24-Volt Electrical System |
| Troubleshooting | 37-44 | Base Unit, Sickle Bar Attachment, Pick-Up Attachment, Electric Controls |
| Optional Equipment | 45-48 | Automatic Hitch Kit, Axle Extensions, Cutterhead Band Concave, Cutterhead Paddles, Vertical Extension, Horizontal Spout Extension |
| Specifications | 49-50 | Harvester Width, Harvester Height, Harvester Length, Harvester Weight, Cutterhead Speed, Number of Knives |
| Torque and Conversion Charts | 51-55 | Sae and Astm Grade Identification Marks, Standard Tightening Torque, Inches to Millimeters Conversion, Millimeters to Inches Conversion, Hydraulic Tubes and Fittings Torque |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Oil seal recess into seal retainer | 1½" | p. 18 |
| Gearbox oil seal recess into housing | 9/32" + 1/32" - 0" | p. 24 |
| Snap ring land position from gearbox housing | 1.197" | p. 24 |
| Reversing gearbox drive belt deflection tension | 60 to 65 lbs. (266.9 to 289.1 N) to deflect 1" (25.4 mm) | p. 25 |
| 540 RPM Heavy-Duty Breakaway Torque | 9750-10,000 in. lbs. | p. 9 |
| Main Drive Gearbox Gear Pressing Force | 5500 to 7000 lbs. | p. 16 |
| Main Drive Gearbox Output Shaft Rolling Torque | 5-10 in. lbs. | p. 16 |
| Reversing Gearbox Drive Belts Tension | 60-65 lbs. | p. 18 |
| Reversing Gearbox Oil Type | API multi-purpose gear lube 90W | p. 24 |
| Cutterhead Knife Support Bolts Torque | 170 ft. lbs. | p. 28 |
| Cutterhead Housing Band Clearance | 1/32" to 1/16" | p. 31 |
