Part of the Kubota Repair Manuals.
This is the Kubota workshop manual for the BX1880, BX2380 and BX2680 compact tractors and the RCK60B-23BX, RCK54-23BX, RCK48-18BX, RCK60D-26BX and RCK54D-26BX mower decks, a 436 page PDF built for D722, D902 and D1005 diesel service.It carries the full mechanism and servicing detail: safety and specifications, tractor and mower identification, engine, transaxle with the hydrostatic transmission, front axle, steering, hydraulic system, electrical system with wiring diagrams, and the mower. You get troubleshooting, service specifications, tightening torques, and step by step disassembly and reassembly.Buy once and download the PDF immediately. Open it on a phone, tablet or shop computer, or print only the sections you need for the job.
What's Inside This Kubota BX1880–BX2680 Package Manual
| System | Pages | Key Topics |
|---|---|---|
| Information | - | - |
| General | - | Identification, Tractor Identification, Checking Serial Number and Hour Meter, Cylinder Number, Checking Mower Identification, Lubricants, Fuel and Coolant, Bx Tractor |
| Engine | - | Engine Body, Cylinder Block, Closed Breather, Half-Floating Head Cover, Piston, Piston Ring, Connecting Rod |
| Transaxle | - | Traveling System, Hydrostatic Transmission, Oil Flow of Hydrostatic Transmission, Neutral Position, Forward Position, Reverse Position |
| Front Axle | - | Front Wheel Alignment, Camber of Front Axle, Kingpin Angle of Front Axle, Caster of Front Axle, Toe-In of Front Axle, Troubleshooting |
| Steering | - | Steering System, Hydraulic Circuit of Steering, Steering Controller, Control Valve, Metering Device |
| Hydraulic System | - | Hydraulic Circuit, Hydraulic Pump, Control Valve |
| Electrical System | - | Wiring Diagram of Bx Tractor, Electrical Connector Chart, Reading Electrical Circuit Diagrams, Electrical Wiring Chart Symbols, Layout of Connector Diagrams, Precautions on Handling Electrical Connectors, Starting System |
| Mower | - | Power Transmission of Mower, Lifting Mechanism of Mower, Self-Balancer System of Mower, Troubleshooting, Servicing Specifications, Tightening Torques, Setting Up Mower [RCK48-18BX |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Front wheel bolt torque | 149.2 to 179.0 N⋅m (15.2 to 18.3 kgf⋅m) [110 to 132 lbf⋅ft] | p. 69 |
| Rear wheel bolt torque | 108.5 to 130.2 N⋅m (11.1 to 13.3 kgf⋅m) [80 to 96 lbf⋅ft] | p. 69 |
| Mower belt replacement | Replace if any damage found | p. 85 |
| Belt tension pulley greasing | Until grease overflows | p. 53 |
| Center pulley holder bolt and nut torque | 78 to 90 N⋅m (7.9 to 9.2 kgf⋅m) [58 to 66 lbf⋅ft] | p. 406 |
| Three spindle shafts greasing | Until grease overflows | p. 53 |
| Front tip and rear tip of blade difference | 0.0 to 5.0 mm (0.0 to 0.20 in.) | p. 405 |
| Left tip and right tip of blade difference | Less than 3 mm (0.12 in.) | p. 405 |
| Transmission oil filter replacement interval | Every 200 Hr | p. 57 |
| Transmission oil filter tightening | Tighten quickly until it contacts the mounting surface, then an additional 1/2 turn by hand only | p. 66 |
| RCK60B-23BX, RCK54-23BX, RCK48-18BX | ||
| Mower blade screw torque | 98.0 to 117.6 N⋅m (10.0 to 12.0 kgf⋅m) [72.0 to 86.8 lbf⋅ft] | p. 84 |
| RCK54D-26BX, RCK60D-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. 84 |
Kubota BX1880–BX2680 Package Common Problems This Manual Covers
Mower deck will not engage
A deck that will not spin up, drops out under load, or burns belts usually has a glazed belt, a seized idler or a worn spindle. The mower section covers the belt, pulleys and spindle structure.
Manual Section: 9. Mower p. 399Three point hitch slow or weak
Low lift power or a slow three point hitch points to fluid, filter or pump trouble in the hydraulic circuit. The hydraulic system section details the pump, control valve and relief valve.
Manual Section: 7. Hydraulic System p. 291Hard starting or stalling
Hard starts, stalling or surging under load are commonly fuel or intake related rather than major engine faults. The engine section covers the fuel filter, feed pump and injection nozzle.
Manual Section: 3. Engine p. 111Weak hydrostatic drive
Sluggish travel or poor response often comes from transmission fluid, filter or linkage rather than internal failure. The transaxle section explains the hydrostatic transmission and its control linkage.
Manual Section: 4. Transaxle p. 190PTO stops or will not run mower
A PTO that cuts out is often a safety interlock, switch or wiring fault. The electrical system section covers the safety switches, relays and operator presence circuit.
Manual Section: 8. Electrical System p. 344Uneven cut or deck vibration
Vibration, scalping or an uneven cut points to bent blades, worn spindle bearings or an off level deck. The mower section covers the blade, spindle and lifting mechanism.
Manual Section: 9. Mower p. 399Heavy or wandering steering
Hard steering or excess play can come from the steering controller, relief valve or cylinder. The steering section details the controller, control valve and steering cylinder.
Manual Section: 6. Steering p. 274Frequently Asked Questions
Which machines does this workshop manual cover?
It covers the Kubota BX1880, BX2380 and BX2680 tractors along with the RCK60B-23BX, RCK54-23BX, RCK48-18BX, RCK60D-26BX and RCK54D-26BX mower decks in one manual.
Does it include torque specs and wiring diagrams?
Yes. Tightening torque tables run through the general and component sections, and the electrical system section provides the BX wiring diagrams and connector charts. p. 344
Are the RCK mower decks covered as well?
Yes. The mower section covers the deck power transmission, lifting mechanism, self balancer, blade and belt service for the RCK decks listed on the cover. p. 399
Which engines does it cover?
The engine section covers the Kubota D722, D902 and D1005 diesels used in these BX tractors, including mechanism, servicing and specifications. p. 111
How quickly can I access this manual after buying?
Delivery is instant: the 436-page searchable PDF unlocks the moment checkout completes. Open it on a computer, tablet, or phone with no shipping wait.
Am I able to print pages from this manual?
Yes. The PDF carries no DRM, so you can print any page or section you need for the shop. It works with any standard printer.
Does this Kubota BX1880 & variants manual include wiring diagrams?
Complete wiring diagrams are included, covering every electrical circuit, harness route, and connector pinout for the BX1880, BX2380, and BX2680.
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