Part of the John Deere Repair Manuals.
Within the hour you could have a slip clutch stripped on the bench with the John Deere 403 technical manual PDF open next to it: 272 pages of factory Technical Manual TM1394 covering eleven rotary cutter models, 403 through 1508. Gear case rebuilds take up roughly half the book, walking each series from disassembly through gear backlash adjustment and blade holder shaft rolling torque checks. Driveline, shear device, and blade holder repair get their own sections, backed by exploded views that show how every shim and washer stacks back together. Check slip clutch spring length against the 28 mm (1.1 in) spec before you condemn the clutch, then torque the limiting hub cap screws to 66 N·m (53 lb-ft) on reassembly. Every day the cutter sits is a mowing day gone. Print the bookmarked pages, let them catch the gear oil, and keep the searchable file clean.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety and Specifications | 5-24 | Introduction and Safety Information, Hardware Torque, Lubrication, Serial Numbers |
| Driveline Repair | 25-54 | Driveline Specifications, Driveline Repair Procedures, Driveline Shield Repair |
| Clutch and Shear Device Repair | 55-76 | Shear Device Repair, Slip Clutch Repair |
| General Information | 77-86 | Gear Identification, Fabricated Tools, Gear Case Mounting Hardware |
| Series Gear Case | 87-98 | Disassembly, Inspection, Input Shaft Installation, Blade Holder Shaft Installation |
| Series Gear Case | 99-112 | Disassembly, Blade Holder Shaft Rolling Torque, Input Shaft Installation, Gear Backlash Adjustment |
| Series Outer and 9 Series Gear Case | 113-134 | General Information, Disassembly, Blade Holder Shaft Installation, Input Shaft Installation, Gear Backlash Adjustment |
| 1008 Integral or Center Pull-Type, Center Gear Case | 135-150 | Disassembly, Inspection, Input Shaft Installation, Output Shaft Installation, Gear Case Cover Installation |
| 1008 Offset Pull-Type, Left-Hand Gear Case | 151-176 | Disassembly, Output Shaft Assembly, Blade Holder Shaft Installation, Input Shaft Installation, Gear Backlash Adjustment |
| 1408, 1418 Center Gear Case | 177-202 | Disassembly, Input Shaft Assembly, Blade Holder Shaft Installation, Output Shaft Installation, Gear Backlash Adjustment |
| 1508 Center Gear Case | 203-236 | Disassembly, Blade Holder Shaft Installation, 540 RPM Input Shaft Installation, 1000 RPM Input Shaft Installation, Output Shaft Assembly |
| Miscellaneous Repair | 237-272 | Blade Repair, Blade Holder Repair, Rotary Cutter Frame Replacement |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| 1/4 in. Bolt Torque (SAE 2) | 8 N.m (6 lb-ft) | p. 21 |
| 1/4 in. Bolt Torque (SAE 5) | 12 N.m (9 lb-ft) | p. 21 |
| Torque limiting hub cap screw torque | 66 N·m (53 lb-ft) | p. 63 |
| 3 Series slip clutch spring length | 28 mm (1.1 in) | p. 65 |
| 3 Series slip clutch shield cap screw torque | 11 N·m (8 lb-ft) | p. 66 |
| Input Shaft Preload | 0.05 to 0.15 mm (0.002 to 0.006 in.) | p. 116 |
| Blade Holder Shaft Retaining Cap Screw Torque | 224 N·m (165 lb-ft) | p. 101 |
| Blade Holder Shaft Rolling Torque | 1.7 to 4.0 N·m (15 to 35 lb-in.) | p. 116 |
| Blade Holder Shaft Cap Screw Retainer Torque | 224 N·m (165 lb-ft) | p. 117 |
| Output Shaft Preload | 0.05 to 0.15 mm (0.002 to 0.006 in.) | p. 116 |
| 3 Series | ||
| 3 Series Gear Case Mounting Cap Screws Torque | 236 N·m (174 lb-ft) | p. 88 |
| 6 Series | ||
| 6 Series Gear Case Mounting Cap Screws Torque | 312 N·m (230 lb-ft) | p. 100 |
