Part of the Kubota Parts Manuals.
This is the parts catalog for the Kubota B20 compact tractor, 251 pages of exploded diagrams and part numbers. It works from the engine crankcase, oil pan, piston and crankshaft, cylinder head and injection pump through the cooling and fuel systems, the dynamo, starter and battery, then the clutch, HST transmission, shafts, axles, brakes and the hydraulic lift circuit.
Every assembly pairs a diagram with reference numbers, Kubota part numbers, descriptions and quantities, with serial number and interchangeability notes so you order the right component for your tractor. It is the reference for identifying wear parts and matching replacements on the B20.
Whether you need a fuel filter, an air cleaner element, an HST part, a hydraulic gear pump component or a radiator, you can confirm the exact number before buying. Download the PDF after purchase and print the diagram pages you need at the bench.
What's Inside This Kubota B20 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Clutch & Transmission | Clutch, Clutch Rod, Clutch Pedal, Clutch Housing, Transmission Case, Transmission Case Cover, HST, 1St Shaft/2Nd Shaft, 3Rd Shaft, 4Th Shaft, Neutral Holder, Speed Change Plate, Hi-Lo Gear Shift Lever, Hi-Lo Gear Shift Fork | |
| Fuel System | Nozzle Holder, Fuel Camshaft, Injection Pump, Engine Stop Lever, Speed Control Plate, Governor, Air Cleaner, Engine Stop Rod, Accelerator Lever, Fuel Tank, Fuel Pipe 1, Fuel Filter, Fuel Pipe 2, Speed Control Pedal | |
| Cooling System | Water Pump, Water Flange/Thermostat, Fan, Water Pipe, Radiator | |
| Engine | Crankcase, Oil Pan, Piston/Crankshaft, Main Bearing Case, Flywheel, Cylinder Head, Valve/Rocker Arm, Cylinder Head Cover, Inlet Manifold, Exhaust Manifold, Camshaft, Gear Case, Muffler, Bevel Gear Case | |
| Electrical System | Dynamo, Starter, Battery, Light, Panel/Switch, Wire Harness, Rear Working Light, Front Working Light | |
| PTO | PTO Shaft, Front Wheel Drive Lever/PTO Lever, PTO Fork Shaft | |
| Rear Axle, Differential & Brakes | Rear Differential, Rear Axle, Rear Axle Case, Brake, Brake Rod, Brake Pedal, Front Axle Case | |
| Front Axle & Steering | Propeller Shaft, Front Drive Shaft/6Th Shaft, Front Drive Fork, Front Axle Arm, Front Differential, Front Drive Shaft, Front Axle Frame, Knuckle Arm/Tie Rod, Power Steering | |
| Hydraulics & 3-Point Hitch | Hydraulic Gear Pump, Hydraulic Pipe, Hydraulic Block, Lift Arm, Hyd.Cylinder Cap, Control Valve, Control Valve 1, Control Valve 2, Control Valve 3, Top Link, Lower Link / Lift Rod, Top Link Bracket | |
| Body & Operator Station | Main Frame, Hood, Hood Cover Rear, Front Grille, Fender, Seat, Seat Turn Table, Seat Base, Seat Plate, Step, ROPS, FOPS | |
| Decals & Accessories | Label 1, Label 2, Accessories and Service Parts | |
| Other Components | Release Lever, 7Th Shaft, Diff.Lock Pedal, Rear S.S. Sure Grip Tire, Rear Ind.Sure Grip Tire, Bevel Gear Shaft, Front Sure Grip Tire, Check Chain |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Fuse Rating | 15A | p. 95 |
| Piston Oversize | +0.5MM | p. 11 |
| Metal Crankpin Undersize | -0.2MM | p. 11 |
| Nozzle Holder Adjusting Washer Thickness (Min) | 1.00MM | p. 23 |
| Nozzle Holder Adjusting Washer Thickness (Max) | 1.95MM | p. 23 |
| Injection Pump Shim Thickness | 0.15MM | p. 41 |
| Wire Harness Fuse Rating | 15A | p. 95 |
| HST Gear Tooth Count | 17T | p. 107 |
| 1st Shaft Gear Tooth Count | 16T | p. 114 |
| Rear Differential Bevel Gear Ratio | 6-37T | p. 142 |
| Rear Axle Gear Tooth Count | 60T | p. 146 |
| Rear Tire Size | 12.4-16 | p. 149 |
