Part of the Kubota Repair Manuals.
This Kubota Workshop Manual covers the BX23S-AU sub-compact tractor together with the LA340AU front loader, the BT603 backhoe, and the RCK54D, RCK60D, RCK54, and RCK60B rotary mower decks. It is the factory service manual, publication number 9Y111-18062, running 532 pages.
The manual is organized by system: the D902 engine, transaxle, front axle, steering, hydraulic system, mower, and electrical system, plus dedicated Front Loader and Backhoe sections for the LA340 and BT603 attachments. It carries torque values, clearances, servicing procedures, and mechanism descriptions.
Use it to torque wheel and mower hardware correctly, service the loader and backhoe hydraulics and quick-attach, set up the mower deck, or trace an electrical fault, all with factory specifications for the BX23S and its implements.
Complete the set for your BX23S-AU Package
- Operator Manual: Kubota BX23S, LA340, BT603 Tractor, Loader, Backhoe Operator Manual
Other edition of this manual
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | Identification, General Precautions, Handling Precautions for Electrical Parts and Wiring, Lubricants, Fuel and Coolant, Tightening Torques, Maintenance Check List, Check and Maintenance, Tires, Wheels, And Ballast, Implement Limitations, Special Tools | |
| Engine | Cylinder Block, Breather, Head Cover, Piston, Piston Ring, Connecting Rod, Crankshaft, Rocker Arm | |
| Transaxle | Traveling System, Hydrostatic Transmission, PTO System, Front Wheel Drive Section, Differential Gear Section, Differential Lock, Brake Section | |
| Front Axle | Front Wheel Alignment, Front Axle Rocking Force, Front Wheel Steering Angle, Propeller Shaft, Power Steering Cylinder, Bevel Gear Case, Front Gear Case | |
| Steering | Steering Controller, Steering Cylinder, Power Steering Body, Power Steering Hose, Tie-Rod | |
| Hydraulic System | Hydraulic Pump, Control Valve, Flow Priority Valve, Relief Valve, Hydraulic Cylinder, Hydraulic Block Type Outlet, Mower Linkage, Front Loader Valve | |
| Mower | Universal Joint, Rear Link, Front Link, Balancer, Mower Blades, Mower Belt, Gear Box | |
| Electrical System | Wiring Diagram, Electrical Connector, Electrical Wiring Chart Symbols, Color of Wiring, Unit Symbol, Connector Arrangement, Electrical Circuit of Starting System, Function of Relay | |
| Front Loader | Hydraulic Circuit, Boom Cylinder, Bucket Cylinder, One Touch Front Loader, Quick Touch Coupler, Auto Lock Attachment, Mechanical Loader Frame | |
| Backhoe | Hydraulic Circuit, Control Valve, Overload Relief Valve, Hydraulic Cylinder |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| BX23S-AU | ||
| Front wheel bolt torque | 149.2 to 179.0 N·m (15.2 to 18.3 kgf·m, 110 to 132 lbf·ft) | p. 81 |
| Rear wheel bolt torque | 108.5 to 130.2 N·m (11.1 to 13.3 kgf·m, 80 to 96 lbf·ft) | p. 81 |
| Engine Gross Power | 17.1 kW (23.0 HP) | p. 38 |
| Total Displacement | 898 cm³ (54.8 cu. in.) | p. 38 |
| Fuel Tank Capacity | 25 L (6.6 U.S.gals.) | p. 38 |
| Engine Crankcase Capacity (with filter) | 3.3 L (3.5 U.S.qts.) | p. 38 |
| RCK54-23BX, RCK54D-26BX | ||
| Mower blade screw torque | 102.9 to 117.6 N·m (10.5 to 12.0 kgf·m, 75.9 to 86.8 lbf·ft) | p. 96 |
| All Models | ||
| Quick coupler cartridge tightening torque | 27 to 33 N·m (2.8 to 3.3 kgf·m, 20 to 24 lbf·ft) | p. 475 |
| Hose fitting, flare nut (UNF) 9/16 tightening torque | 25 to 28 N·m (2.6 to 2.8 kgf·m, 19 to 20 lbf·ft) | p. 67 |
| Hose fitting, flare nut (UNF) 3/4 tightening torque | 36 to 40 N·m (3.7 to 4.0 kgf·m, 27 to 29 lbf·ft) | p. 67 |
| Mower blade screw torque | 102.9 to 117.6 N·m (10.5 to 12.0 kgf·m, 75.9 to 86.8 lbf·ft) | p. 96 |
| Front tip and rear tip of blade difference | 0.0 to 5.0 mm (0.0 to 0.20 in.) | p. 350 |
