Part of the John Deere Repair Manuals.
All 191 pages of this Sabre Technical Manual (OEM TM-GX10131, PDF) focus on the 1338, 1538, 15538, 1546, 1638, and 1646 lawn tractors, covering both Gear and Hydro drive versions. You get factory wiring diagrams plus a full electrical diagnostics section: battery, starter solenoid, seat switch, ignition switch, and ground circuit tests. Complete transaxle work is here too, from shift linkage adjustment and brake service on the gear models to the K55/K51 bleed procedure on the hydros, backed by exploded views and Grade 1 through Class 12.9 torque values. Check your gear model's traction drive belt against the 2660±8 mm new-length spec, then torque the blade cap screws to 46-65 N-m before the deck goes back on. A no-crank fault on mowing day is a bad morning. Bookmarked with a real text layer: search the spec, walk to the tractor, fix it.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Specifications | 2-5 | Engine, Electrical, Fuel/Air System, Power Train, Mower Deck, Chassis |
| Unified Inch Torque Values | 6 | Grade 1, Grade 2, Grade 5, Grade 8, Shear Bolts, Lock Nuts |
| Metric Torque Values | 7 | Class 4.8, Class 8.8, Class 9.8, Class 10.9, Class 12.9, Shear Bolts |
| Gasoline Specifications | 8 | Gasoline Storage, Engine Oil |
| Lubricant Specifications | 8-9 | Engine Oil, Grease, Alternative Lubricants, Synthetic Lubricants, Oil Filters, Lubricant Storage |
| Specifications & Information | 10-17 | Power Train K55/K51, Traction Drive Belt, Mower Deck, Chassis, Hitch Capacity, Steering, Wheels, Tires |
| Engine | 18-23 | Engine Specifications, Engine Removal, Engine Installation |
| Electrical | 24-51 | Electrical Schematic, Diagnostics, Battery Test, Starter Solenoid Test, Seat Switch Test, Ignition Switch Test, Ground Circuit Tests |
| Gear Power Train | 52-85 | Transaxle Operation, Traction Drive System, Shift Linkage Adjustment, Transaxle Removal, Transaxle Disassembly, Brake Assembly |
| Hydrostatic Power Train | 86-145 | K55/K51 Transaxle, Traction Drive System, Brake/Neutral Return Pedal, Transport (Free-Wheel) System, Transaxle Bleed Procedure |
| Steering, Attachments, Miscellaneous, and Index | 146-191 | Steering Gear Removal, Mower Deck Removal, Mower Spindle Assembly, Fuel Tank and Dash Panel, Service Information Bulletins, Index |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Traction Drive Belt (Gear) New Belt Length | 2660±8 mm (104.7±0.3 in.) | p. 11 |
| Traction Drive Belt (Hydro—K55 Transmission) New Belt Length | 2485±8 mm (97.8±0.3 in.) | p. 11 |
| Mower Deck Drive Belt (38-Inch Deck) Actual effective length | 2425±10 mm (95.5±0.4 in.) | p. 11 |
| Mower Deck Drive Belt (46-Inch Deck) Actual effective length | 3492±10 mm (137.5±0.4 in.) | p. 11 |
| Blade Cap Screw | 46-65 N•m (34-48 lb-ft) | p. 167 |
| Spindle Assembly Nuts | 27 N•m (20 lb-ft.) | p. 167 |
| Crankcase Oil Capacity | 3 Pints | p. 9 |
| Fuel Tank Capacity | 4.7 L (1.25 gal) | p. 9 |
| Battery Cranking Amps | 230 amps at 0° C (32° F) | p. 9 |
| Battery Cold Cranking Amps | 190 amps at 0° C (32° F) | p. 9 |
| Headlight Bulbs | Type 1156, 12 Volt | p. 9 |
| Hydrostatic Transmission Capacity (K55) | 1.6 L (3.4 pt) | p. 10 |




















