This is the operator's manual for the Kubota BX23S sub-compact tractor package, covering the LA340 and LA340S front loaders and the BT603 backhoe built around Kubota's D902 diesel engine. Across 165 pages it walks owners through safe operation, daily and pre-operation checks, and every control on the tractor, loader, and backhoe.
You get the full specification tables, service intervals, and step-by-step maintenance for the engine, hydrostatic transmission, cooling system, and battery, plus torque values for the wheels and for the loader and backhoe mounting hardware. Sections on operating the loader and backhoe explain filling and dumping the bucket, digging, and the hydraulic pressure relief procedure used when attaching or removing the loader.
Whether you service the machine yourself or hand it to a mechanic, this PDF gives you the factory reference for keeping the BX23S, LA340, LA340S, and BT603 running correctly.
Complete the set for your BX23S, LA340, LA340Sā¦
What's Inside This Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Front Matter | 1-10 | Abbreviation List, Universal Symbols, Foreword, Safety First, Contents |
| Safe Operation | 11-28 | Tractor Safety, ROPS, Before Operating, Operating Tractor, Parking, PTO Safety, 3-Point Hitch Safety, Servicing, Loader Safety, Backhoe Safety, Warning Labels, Smv Emblem |
| Identification & Servicing | 29-30 | Serial Numbers, Tractor Identification Plate, Engine Serial Number, Loader and Backhoe Serial Numbers, Warranty, D902 Engine |
| Tractor Specifications | 31-32 | Engine Specs, Capacities, Dimensions, Hydraulic Unit, PTO, Traveling Speeds, HST Transmission, 4WD |
| Loader & Backhoe Specifications | 33-42 | Loader Specifications LA340/LA340S, Bucket Specifications, Lift Capacity, Backhoe Specifications BT603, Dimensions, Lift Capacity per Sae J31, Implement Limitations |
| Instrument Panel, Controls & Pre-Operation Checks | 43-56 | Instrument Panel and Controls, Daily Check, Pre-Operation Checks, Lubrication, Transmission Fluid, Tire Inflation, Bleeding Hydraulic System, Operator Seat, Ballast |
| Operating the Engine & Tractor | 57-72 | Starting Engine, Cold Weather Starting, Block Heater, Stopping Engine, Jump Starting, Foldable ROPS, Seat Belt, Tilt Steering, Lights, Range Gear Shift Hi-Lo, 4WD Lever, Hand Accelerator, Parking Brake, Speed Control Pedal, Differential Lock |
| PTO, 3-Point Hitch, Drawbar & Hydraulic Unit | 73-87 | PTO Operation, PTO Levers, Stationary PTO, 3-Point Hitch, Attaching Implements, Top Link, Check Chains, Drawbar, Hydraulic Control, Auxiliary Hydraulics, Wheels, Ballast, Wheel Tread |
| Operating the Loader | 88-100 | Filling Bucket, Lifting and Carrying Load, Dumping, Float Control, Loading Trucks, Backfilling, Valve Lock, Bucket Level Indicator, Quick Coupler, Front Remote Hydraulic Control, Pallet Fork, Snow Blade |
| Operating the Backhoe | 101-106 | Backhoe Controls, Boom Swing Lever, Dipperstick and Bucket Lever, Stabilizer Controls, General Operation, Straight Wall Digging, Transporting, Trailer Transporting |
| Maintenance | 107-140 | Service Intervals, Lubricants Fuel Coolant, Biodiesel Bdf, Daily Check, Engine Oil, Transmission Fluid, Coolant, Radiator Screen, Easy Checker, 50/100/200/400/800/1000/2000/3000-Hour Service, Battery, Air Cleaner, Fuel Filter, Fan Belt, Front Axle Oil, Valve Clearance, Bleeding Fuel System, Fuse, Loader and Backhoe Lubrication, Bucket Teeth, Torque Specifications |
| Storage, Removal, Troubleshooting & Options | 141-165 | Tractor Storage, Removing and Reinstalling Loader, Removing and Reinstalling Backhoe, Engine Troubleshooting, Options, Turf Tires, Block Heater, Rear Work Light, Index |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic pressure relief procedure | 1. Move the key switch to the "RUN" position. 2. Push the front hydraulic valve main switch "ON". 3. Press the activation switch and move the loader lever to left and right several times. 4. Push the front hydraulic valve main switch "OFF". 5. Turn the key switch to the "OFF" position. | p. 95 |
| Front wheel bolt torque | 149.2 to 179.0 N-m (15.2 to 18.3 kgf-m, 110 to 132 lbf-ft) | p. 91 |
| Rear wheel bolt torque | 108.5 to 130.2 N-m (11.1 to 13.3 kgf-m, 80 to 96 lbf-ft) | p. 91 |
| Engine oil filter replacement interval | every 200 Hr | p. 107 |
| Transmission oil filter replacement interval | every 200 Hr | p. 107 |
| Air cleaner element cleaning interval | every 100 Hr | p. 107 |
| Air cleaner element replacement interval | every 1000 Hr or 1 year | p. 107 |
| Fan belt adjustment interval | every 100 Hr | p. 107 |
| Fan belt tension (deflection) | 7 to 9 mm (0.28 to 0.35 in.) | p. 123 |
| Battery condition check interval | every 100 Hr | p. 107 |
| Battery voltage | 12V | p. 120 |
| Grease fittings lubrication interval (general) | every 50 Hr | p. 107 |
