Part of the John Deere Repair Manuals.
This is the John Deere technical manual TM1908 for the Spin-Steer lawn tractors SST15, SST16, and SST18. It is the same 340-page factory document a dealer technician works from, covering the machine system by system: Safety, general vehicle specifications, both engine options (Briggs and Stratton and Kohler), Electrical, Power Train, Steering, Brakes, Attachments, and Miscellaneous service.With it you can diagnose the reverse-steering and drive faults these tractors are known for, read the wiring schematics, follow tests and adjustments, and pull the exact torque values, capacities, and clearances needed for a repair. Coverage runs from carburetor adjustment and engine teardown to transaxle service and mower-deck attachment work.Delivered as a downloadable PDF you can read on any device or print, so you have the procedure in front of you at the machine instead of guessing.
What's Inside This John Deere SST15, SST16, SST18 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 5-8 | Recognize Safety Information, Be Prepared for Emergencies, Use Care in Handling and Servicing Batteries, Service Machines Safely, Work in Clean Area, Avoid Harmful Asbestos Dust |
| General Vehicle Specifications | 9-22 | Engine Specifications, Fuel System, Electrical, Powertrain Specifications, Fastener Torques, Serial Number Locations |
| Engine ? Briggs and Stratton | 23-70 | Engine Specifications, Torque Specifications, Tests and Adjustments, Carburetor Adjustment, Engine Removal and Installation, Piston, Rings & Rod Removal and Installation |
| Engine ? Kohler | 71-116 | General Specifications, Torque Specifications, Troubleshooting, Tests and Adjustments, Engine Repair, Starting Motor Removal and Installation |
| Electrical | 117-200 | General Information, Specifications, System Schematics, Diagnostics & Operation, Tests and Adjustments |
| Power Train | 201-246 | Specifications, Component Location, Theory of Operation, Diagnostics, Tests & Adjustments, Repair |
| Steering | 247-270 | Specifications, Component Location, Theory of Operation, Diagnostics, Adjustments, Repair |
| Brakes | 271-282 | Specifications, Component Location, Theory of Operation, Tests & Adjustments, Repair |
| Attachments | 283-326 | Repair Specifications, Component Location, Diagnostics, Tests & Adjustments, Repair |
| Miscellaneous | 327-334 | Repair Specifications, Torque Specifications, Tire Pressure Adjustment, Hood Removal and Installation, Fender Deck Removal and Installation, Rear Wheel Removal and Installation |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Steering Gear Assembly to Frame | 25 N•m (18 lb-ft) | p. 249 |
| Fender Deck Front Bolts | 6.8 N•m (60 lb-in.) | p. 249 |
| Declutch Spring Length | 54 – 58 mm (2.12 – 2.28 in.) | p. 203 |
| Declutch Idler Pulley Nut | 26 N•m (19 lb-ft) | p. 203 |
| Reverse Rod Length | 747.5 mm (29.43 in.) | p. 249 |
| Steering Switch Gap | 1.5 mm (0.1 in.) | p. 249 |
| Forward Pedal to Deck Height | 50 mm (1.97 in.) | p. 202 |
| Forward/Reverse Pedal Lock Nuts | 47 N•m (35 lb-ft) | p. 329 |
| SST18 | ||
| Blade Bolt Torque | 68 N•m (50 lb-ft) | p. 14 |
| Blade cap screw | 68 N•m (50 lb-ft) | p. 285 |
| SST15 | ||
| SST15 Horsepower | 11.2 kW (15 hp) | p. 11 |
| SST16 | ||
| SST16 Horsepower | 11.9 kW (16.0 hp) | p. 11 |
John Deere SST15, SST16, SST18 Common Problems This Manual Covers
Drives in reverse but not forward
A common SST failure is a tractor that moves in reverse or steers yet will not pull forward, usually a broken spring or worn linkage in the steering/drive control under the rear body panels. The Power Train section covers the drive mechanism theory, diagnostics, and repair.
Manual Section: Power Train p. 201Poor or lost steering response
The spin-steer control can wear or break, leaving the tractor hard to turn or unresponsive at the wheel. Owners often have to strip several panels just to reach the mechanism, so the Steering section's component locations, adjustments, and repair steps save real time.
Manual Section: Steering p. 247Micro switch or pinched wire fault
Steering and safety behavior on these tractors depends on micro switches and their harness, and a pinched or chafed wire can cause erratic operation. The Electrical section provides the schematics, diagnostics, and test procedures to trace it.
Manual Section: Electrical p. 117Machine will not start or cuts out
Safety interlocks tied to the seat switch, parking brake, and PTO can stop the engine if a switch or connector fails. The Electrical section's diagnostics and tests help confirm whether the interlock circuit, and not the engine, is at fault.
Manual Section: Electrical p. 117Weak or dragging brakes
Brake performance drops off as the friction components and linkage wear. The Brakes section gives the specifications, component locations, tests and adjustments, and repair procedures to restore proper stopping.
Manual Section: Brakes p. 271Mower deck vibration or blade wear
Worn spindles, loose blades, or damaged gage wheels cause vibration and uneven cutting. The Attachments section covers deck component locations, diagnostics, adjustments, and the blade and spindle torque values for a correct rebuild.
Manual Section: Attachments p. 283Frequently Asked Questions
Which tractors does this manual cover?
It is John Deere technical manual TM1908, covering the Spin-Steer lawn tractors SST15, SST16, and SST18. It is the North American version factory technical manual for all three models.
Does it cover both the Briggs and Stratton and Kohler engines?
Yes. There are separate engine sections for each option, with specifications, torque values, tests and adjustments, carburetor work, and full repair. The Briggs and Stratton engine section starts the engine coverage. p. 23
Does it include wiring schematics and steering diagnostics?
Yes. The Electrical section provides system schematics, general information, specifications, diagnostics and operation, plus tests and adjustments, which is where the micro switch and steering-circuit faults are traced. p. 117
Are torque specs for the steering components included?
Yes. The Steering section lists specifications along with component locations, theory of operation, diagnostics, adjustments, and repair, giving the fastener torques and clearances needed for spin-steer linkage work. p. 247
Is this John Deere SST15, SST16, SST18 Technical Manual a digital download?
A 340-page Technical Manual in searchable PDF format, available the moment you finish checkout. View it on a computer, tablet, or phone. No shipping wait.
Can I print this John Deere SST15, SST16, SST18 manual?
None at all. The PDF is DRM-free, so print whatever sections you need for the shop. Standard letter or A4 paper works.
Can I find wiring schematics in this John Deere SST15, SST16, SST18 manual?
Yes. Full electrical schematics are included, with wire colors, connector locations, and circuit descriptions.
Reviews
There are no reviews yet.