This is the factory parts catalog for the Kubota B1550D, the 4WD version of Kubota's B1550 compact diesel tractor produced from 1988 to 1997. Its 302 pages present each assembly as an exploded diagram tied to Kubota part numbers, reference callouts, quantities, and serial number ranges so you order the exact component for your machine.Coverage runs system by system across the engine, fuel, cooling, and electrical groups, then through the clutch, transmission, rear axle, brakes, and the four wheel drive front axle with its bi-speed turn hardware. Steering, hydraulics, PTO, and wheel options are all diagrammed.Use it to trace a worn part on the picture page, read off its number, and hand that to your dealer. It is a parts reference for identifying components, not a step by step repair manual.
What's Inside This Kubota B1550D Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Clutch & Transmission | Clutch, Clutch Rod, Clutch Pedal, Clutch Housing, Transmission Case, Transmission Case Cover, 2Nd Shaft, 3Rd Shaft/5Th Shaft, 4Th Shaft, Reverse Shaft, Main Gear Shift Lever, Main Gear Shift Fork, Range Gear Shift Lever, PTO Gear Shift Lever, Clutch Disk, Shift Fork | |
| Fuel System | Nozzle Holder, Fuel Pump, Injection Pump, Engine Stop Lever, Speed Control Plate, Governor, Air Cleaner, Engine Stop Rod, Accelerator Lever, Fuel Tank, Fuel Pipe, Fuel Filter | |
| Cooling System | Water Pump, Water Flange, 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, Upper Gasket Kit, Lower Gasket Kit, Muffler, Horizontal Muffler | |
| Electrical System | Dynamo, Alternator, Starter, Battery, Light, Working Light, Panel / Switch, Panel Board, Wire Harness | |
| PTO | Rear PTO, Mid PTO, Front PTO | |
| Rear Axle, Differential & Brakes | Rear Differential, Rear Axle, Rear Axle Case, Rear Wheel, Brake, Brake Rod, Brake Pedal, Front Axle Case | |
| Front Axle & Steering | Propeller Shaft, Front Wheel Hub, Front Differential, Front Drive Shaft, Front Drive Lever, Front Wheel, Knuckle Arm, Manual Steering, Power Steering | |
| Hydraulics & 3-Point Hitch | Hydraulic Gear Pump, Hydraulic Pipe, Hydraulic Block, Lift Arm, Hyd.Cylinder Cap, Control Valve, Top Link, Lower Link | |
| Body & Operator Station | Front Axel Frame, Hood, Hood Cover Rear, Dust Cover, Tank Support, Fender, Seat, Step, ROPS | |
| Decals & Accessories | Label 1, Label 2, Accessories and Service Parts | |
| Other Components | Tension Pulley, 1St Shaft, Pinion Shaft Gear, Diff.Lock Pedal, Bevel Gear, Bi-Speed Turn Rod, Bi-Speed Turn Lever, Lifting Rod, Lace, Skirt |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| FUSE | 15A | p. 117 |
| FUSE AUTO | 15A | p. 302 |
| Piston Oversize | +0.5MM | p. 12 |
| Crankpin Metal Undersize | -0.2MM SET | p. 12 |
| Nozzle Adjusting Washer Thickness | 1.00MM | p. 25 |
| Injection Pump Shim Thickness | 0.20MM | p. 46 |
| Hydraulic Pump Gear Tooth Count | 27T | p. 70 |
| Fuse Rating | 15A | p. 117 |
| 3rd Shaft/5th Shaft Shim Thickness | 0.5MM | p. 139 |
| Rear PTO Gear Tooth Count | 22T | p. 149 |
| Rear Axle Gear Tooth Count | 55T | p. 167 |
| Rear Wheel Tire Size | 8-16 | p. 172 |
Kubota B1550D Common Problems This Manual Covers
Hard start, smoke, then stalling
Neglected B1550D units start hard, smoke, lose power, and quit, usually from a clogged fuel filter or dirty pickup. The catalog identifies the fuel filter and its component parts for replacement.
Manual Section: Fuel Filter [Component Parts] p. 89Cranks but will not fire
No-start faults on these tractors often come back to the wiring, key switch, or a loose connector rather than the engine itself. The wire harness section maps the circuits and connectors.
Manual Section: Wire Harness [A Au] p. 116Overheating while working
A blocked radiator screen and packed fins let the coolant temperature climb under load. The radiator assembly is diagrammed so screens, hoses, and the core can be sourced.
Manual Section: Radiator p. 94Weak hydraulic lift
Slow or weak lift response usually points to a worn hydraulic gear pump or restricted flow. This section breaks the pump into its individual parts.
Manual Section: Hydraulic Gear Pump p. 69Front drive and hub wear
As a 4WD machine the B1550D loads its front wheel hubs and drivetrain, which wear and leak over time. The front wheel hub section identifies the bearings, seals, and hub parts.
Manual Section: Front Wheel Hub p. 187Clutch wear and drag
High-hour tractors develop clutch wear that makes shifting stiff. The clutch section identifies the disc, cover, and related hardware to order.
Manual Section: Clutch p. 67PTO slips or will not engage
Worn PTO gears and splines show up on machines run with heavy implements. The rear PTO section maps the gears and shafts for replacement.
Manual Section: Rear PTO p. 147Frequently Asked Questions
Which Kubota tractor does this parts catalog cover?
It covers the Kubota B1550D, the 4WD variant of the B1550 compact diesel tractor. Part numbers, reference callouts, and serial number ranges throughout are specific to this model.
Is this a repair manual or a parts catalog?
It is a parts catalog. You get exploded diagrams, Kubota part numbers, quantities, and serial number ranges to identify and order components, not step by step repair or torque procedures.
Does it include four wheel drive front axle parts?
Yes. Because the B1550D is a 4WD tractor, the catalog diagrams the front wheel hub, front axle, and bi-speed turn hardware so front drivetrain parts can be identified by number. p. 187
Can I find hydraulic pump parts in it?
Yes. The hydraulic gear pump is shown broken down into its component parts, so you can order pump internals and related fittings. p. 69
How quickly can I access this manual after buying?
Checkout delivers the 302-page searchable PDF immediately. Open it on a laptop, tablet, or phone, then carry it out to the shop floor.
Am I able to print pages from this manual?
No restrictions. The PDF is DRM-free, so print whatever sections you want on standard letter or A4 paper and take them to the shop.
Does this Kubota B1550D manual include hydraulic schematics?
Yes. The catalog includes detailed exploded-view diagrams for every hydraulic component, including the gear pump, control valve, lift arms, and hydraulic pipes. It does not include full hydraulic system schematics or pressure test specifications.
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