Part of the Kubota Parts Manuals.
This is the factory parts catalog for the Kubota B5100D-P compact diesel tractor, delivered as a downloadable PDF. It documents the machine group by group, from the crankcase, cylinder head, and injection pump through the clutch, transmission, differential, hydraulic control valve, steering, and the four wheel drive front axle unique to the D-P.Every group pairs an exploded diagram with a numbered parts list showing reference numbers, Kubota part numbers, quantities, and serial number ranges, so you can identify the exact component your tractor needs and confirm it fits your serial number before ordering. Interchangeability notes flag where a part supersedes an older one.Use it to plan a repair, order the right seals, gaskets, bearings, or wear items the first time, and avoid guesswork when working on an engine, driveline, or hydraulic job on your B5100D-P.
What's Inside This Kubota B5100D-P Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Clutch & Transmission | Clutch, Transmission Case, Clutch Rod, 1st Shaft 4th Shaft, 2nd Shaft Reverse Shaft, Main Speed Change, Aux.Speed Change, Clutch Housing | |
| Fuel System | Nozzle Holder, Injection Pump, Speed Control Plate, Governor, Accelerator Pedal, Fuel Tank, Air Cleaner, Fuel Filter | |
| Cooling System | Radiator | |
| Engine | Crankcase, Cylinder Head, Gear Case, Bearing Case, Breather, Inlet Manifold, Valve Rocker Arm, Head Cover, Camshaft, Piston Crank Shaft, Flywheel, Muffler, Front Wheel Gear Case | |
| Electrical System | Dynamo, Starter, Battery | |
| PTO | 3rd 5th PTO Shaft | |
| Rear Axle, Differential & Brakes | Axle Case, Rear Wheel, Brake, Brake Rod, Front Axle Case | |
| Front Axle & Steering | Front Drive, Steering, Front Wheel Support, Knuckle Arm, Front Wheel | |
| Hydraulics & 3-Point Hitch | Oil Pressure Pump, Control Valve, 3-Point Linkage | |
| Body & Operator Station | Case Cover, Seat, Fender, Bonnet, Panel | |
| Decals & Accessories | Name Plate, Accessary and Service Parts | |
| Other Components | Differential, Oil Pressure Pipe, Oil Pressure Group 1, Oil Pressure Group 2, Drive Shaft |
Every system also includes a parts list and an exploded view.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Manifold Exhaust Weight | 1.19 kgf | p. 16 |
| Piston Weight (STD) | 0.304 kgf | p. 24 |
| Case Transmission Weight | 3 kgf | p. 52 |
Kubota B5100D-P Common Problems This Manual Covers
Transmission bearing failure
Cheap or incorrect replacement bearings can fail inside the transmission and damage neighboring gears. The Transmission Case Group section shows the correct bearings and case parts by serial number so you order the right components.
Manual Section: Transmission Case Group p. 51Worn clutch and drive engagement
As the disc and release parts wear, the clutch slips or drags and drive becomes unreliable. The Clutch Group section lists the disc, cover, and release bearing needed to rebuild it.
Manual Section: Clutch Group p. 37Weak or erratic hydraulics
Worn seals or a tired control valve leave the three point hitch slow or unable to hold a load. The Control Valve Group section identifies the valve body, spools, and seals to service it.
Manual Section: Control Valve Group p. 79Hard starting and fuel starvation
A clogged fuel filter or air in the lines causes hard starts and rough running on this diesel. The Fuel Filter Group section shows the filter and fuel parts to renew during a fuel system service.
Manual Section: Fuel Filter Group p. 129Charging system trouble
An aging dynamo or worn charging parts leave the battery flat after short runs. The Dynamo Group section lists the charging components for this tractor.
Manual Section: Dynamo Group p. 35Front axle wear on the 4WD model
The B5100D-P front drive axle develops play and leaks at the gear case and knuckles with age. The Front Axle Case Group section covers the housings, gears, and seals specific to the D-P.
Manual Section: Front Axle Case Group [B5100D-P] p. 114Frequently Asked Questions
Which Kubota model does this parts catalog cover?
It covers the Kubota B5100D-P, the four wheel drive version of the B5100 compact diesel tractor. Groups specific to the D-P front axle, such as the front axle case and knuckle arm, are included alongside the shared engine and driveline groups.
What information does each parts listing include?
Every group has an exploded diagram plus a table of reference numbers, Kubota part numbers, descriptions, quantities, serial number ranges, and interchangeability notes, so you can match a part to your exact machine and confirm whether it supersedes an older number.
Where are the clutch parts listed?
The Clutch Group section covers the clutch disc, cover, and release parts for the B5100D-P, with part numbers and quantities for a full clutch rebuild. p. 37
Does it cover the hydraulic system parts?
Yes. The Control Valve Group section identifies the hydraulic valve components, and related oil pressure and pipe groups cover the rest of the three point hydraulic system. p. 79
How quickly can I access this manual after buying?
Instant PDF download. The full 134-page searchable Parts Catalog is available immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Are there any print restrictions on this manual?
No restrictions. The PDF is DRM-free, so print any page or section you need. Works with any standard printer.
Can I find hydraulic circuit diagrams in this Kubota B5100D-P manual?
This is a parts catalog, so it shows exploded parts diagrams rather than circuit schematics. It includes detailed exploded views of the hydraulic components, pump, control valve, cylinder, and oil lines, with OEM part numbers, not wiring-style circuit diagrams.
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