Part of the Kubota Parts Manuals.
This is the factory parts catalog for the Kubota B1550HST-D hydrostatic compact tractor, publication number 100K0183. It is a 312 page PDF with a searchable text layer, so you can look up part numbers and copy them directly into an order.The catalog is organized by system, with exploded diagrams and Kubota part numbers for the complete engine, the fuel and cooling systems, the electrical system, the clutch and hydrostatic transmission, the front and rear axles, the hydraulic gear pump, brakes, and body panels. Parts are grouped section by section, from the crankcase through the rear wheels.Owners, restorers, and independent mechanics use it to identify the exact replacement part for a rebuild, order gaskets, bearings, seals, and hardware by number, and confirm which variant a part fits before buying. Serial and country code columns help you match the correct part to your machine.
What's Inside This Kubota B1550HST-D Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Clutch & Transmission | Clutch, Clutch Rod, Clutch Pedal, Clutch Housing, Transmission Case, Transmission Case Cover, HST, 2Nd Shaft, 3Rd Shaft/5Th Shaft, 4Th Shaft, Neutral Holder, Speed Change Plate, 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, Speed Control Pedal | |
| Cooling System | Water Pump, Water Flange, Water Pipe, Radiator, Oil Cooler | |
| 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 Drive 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, Lift Rod | |
| 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, Diff. Lock Pedal, Bevel Gear, Bi-Speed Turn Rod, Bi-Speed Turn Lever, Lace, Skirt |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Piston Oversize | +0.5MM | p. 12 |
| Crankpin Metal Undersize | -0.2MM SET | p. 12 |
| Side Metal Oversize | +0.2MM | p. 12 |
| Nozzle Holder Adjusting Washer Thickness | 1.00MM | p. 25 |
| Hydraulic Pump Gear Tooth Count | 27T | p. 70 |
| Hydraulic Pump Shaft Gear Tooth Count | 20T | p. 70 |
| Fuse Rating | 15A | p. 117 |
| HST Gear Shaft Tooth Count | 14T | p. 133 |
| 2nd Shaft Gear Tooth Count | 14T | p. 143 |
| 3rd/5th Shaft Gear Tooth Count | 21T | p. 145 |
| 4th Shaft Gear Tooth Count | 24T | p. 147 |
| Rear Axle Gear Tooth Count | 55T | p. 173 |
Kubota B1550HST-D Common Problems This Manual Covers
Loses power under load
A restricted fuel supply from a dirty fuel filter is a common cause of power loss during mowing or uphill work. The fuel filter breakdown identifies the filter element and related parts to replace.
Manual Section: Fuel Filter [Component Parts] p. 89Hydrostatic drive feels weak
Worn internal HST components or an overdue filter leave the hydrostatic drive slow and inconsistent. The HST section lays out the transmission assembly and its component parts for identification.
Manual Section: HST p. 131Sluggish hydraulics or three point hitch
A worn hydraulic gear pump reduces flow and leaves the three point hitch slow to lift. The gear pump breakdown shows the pump body, gears, and seals so you can rebuild or replace it.
Manual Section: Hydraulic Gear Pump p. 69Overheating from a clogged radiator
A blocked radiator or damaged cooling parts cause the engine to run hot after extended use. The radiator section identifies the core, screen, hoses, and mounting parts to service the cooling system.
Manual Section: Radiator p. 94Hard starting or weak cranking
Slow cranking after storage often points to a worn starter or its internal parts. The starter breakdown lists the motor and component parts needed to rebuild or replace it.
Manual Section: Starter p. 97Clutch slipping or worn
A slipping clutch that will not fully engage calls for inspecting the clutch pack. The clutch section identifies the clutch disc, cover, and related parts by Kubota part number.
Manual Section: Clutch p. 67Frequently Asked Questions
What does this parts catalog cover?
It is the Kubota B1550HST-D parts catalog under publication 100K0183, a 312 page book of exploded diagrams and Kubota part numbers spanning the engine, transmission, HST, axles, hydraulics, electrical system, and body.
Which section covers the HST parts?
The HST section begins at page 131 and is followed by the HST component parts pages, giving the exploded diagrams and part numbers for the hydrostatic transmission assembly. p. 131
Does it list engine rebuild parts and oversizes?
Yes. The piston and crankshaft section lists standard and oversize parts, including a +0.5MM oversize piston and undersize bearing sets for a bottom end rebuild. p. 11
Does it cover electrical parts and fuses?
Yes. The electrical listings include the dynamo or alternator, starter, wire harness, and panel switches, with a 15A fuse shown on page 117. p. 117
Is this Kubota B1550HST-D Parts Catalog a digital download?
A 312-page searchable PDF downloads instantly after checkout. Open it on your laptop, tablet, or phone, then carry it right to the shop floor.
Can I print this manual?
No restrictions. Print individual pages, full chapters, or the entire manual; the PDF is fully unlocked.
Does this Kubota B1550HST-D manual include hydraulic schematics?
Yes. The catalog has exploded-view diagrams for all hydraulic components, including the hydraulic pump, control valve, and hydraulic block. It does not include full hydraulic system schematics or pressure ratings, which live in a service manual.
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