Part of the John Deere Repair Manuals.
The gear case comes off the POWR-TILL seeder before lunch, and the John Deere 251, 1550 technical manual PDF sits open beside you while it drains: 48 pages of factory repair procedure published under OEM number TM1201. Exploded views take the gear case, cutter wheel units and feed shaft drives apart piece by piece, showing where every shim, flangette and slip clutch plate goes back. A short diagnosis section up front sorts the symptom before you pull anything, and each repair sequence ends with the adjustment and torque value that closes it out. Set gear case backlash between 0.08 and 0.15 mm; run the output shaft clamp nut to 136-163 N·m (100-120 ft-lbs) and flangette bolts to 61 N·m (45 ft-lbs). Guessing costs a second teardown, or a chewed gear. Bookmarked and text-searchable, this PDF gets your seeder running and back in the field.
What's Inside This John Deere 251 & 1550 Powr-Till Seeder Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 4 | Technical Manuals |
| Safety and You | 5 | Personal Safety, Service Area |
| General Information | 6-8 | Lubrication, Power Train Diagram, Seed Metering System, Cutter Wheel Units, Press Wheels |
| Diagnosing Malfunctions and Testing | 9-10 | Organizing the Diagnosis, Diagnosing |
| Powershaft | 11-13 | Removal and Installation, Disassembly, Repair, Assembly |
| Gear Case and Slip Clutches | 14-26 | Test Equipment, Special Tools and Materials, Gear Case Removal, Gear Case Installation, Adjustments, Gear Case Disassembly, Gear Case Inspection, Gear Case Assembly |
| Cutter Wheel Units | 27-32 | Removal, Disassembly, Assembly, Installation, Adjustments |
| End Wheel Drive | 33-37 | Disassembly, Assembly, Installation |
| Feed Shaft Drives | 38-44 | Drive Shaft Replacement, Feed Shaft Bearing Replacement, Removing Grain Shifter, Grain Feed Cups, Grass Cups |
| Grain Agitator | 45 | Disassembly and Repair, Assembly |
| Rockshaft and Bearings (251) | 46 | |
| Specifications | 47-48 | Gear Case, Slip Clutch, Cutter Wheels, Press Wheels, Tires and Wheels, Grain Box Capacity |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Output shaft clamp nut torque | 136-163 N·m (100-120 ft-lbs) | p. 18 |
| Cutter wheel nut torque | 108-163 N·m (80-120 ft-lbs) | p. 28 |
| Flangette bolts torque | 61 N·m (45 ft-lbs) | p. 28 |
| Gear Case Backlash | 0.08-0.15 mm | p. 47 |
| Cutter Wheel Diameter | 305 mm | p. 47 |
| Grain Feed Shaft Rolling Torque | 23 N-m | p. 47 |
| Grass Feed Shaft Rolling Torque | 4 N-m | p. 47 |
| Feed Shaft Lock Nut Torque | 136-169 N-m | p. 48 |
| Cutter Wheel Shaft Nut Torque | 108-163 N-m | p. 48 |
| 1550 | ||
| 1550 Tire Pressure | 193 kPa | p. 47 |
| 251 | ||
| 251 Tire Pressure | 276 kPa | p. 47 |
