Description

Kubota B2100E Parts Catalog – Stop Guessing Part Numbers

If you’ve ever pulled a part off a Kubota B2100E, measured it, and ordered something close only to have it not fit – I’ve been there. That’s wasted time, shipping fees, and a machine down. This Kubota B2100E Parts Catalog is the factory-issued book, 237 pages, that gives you the exact part number for every bolt, gasket, and hydraulic seal. No aftermarket guesswork, no cross-referencing from a generic site. Page 1 explains the column headers: Ref.No ties the diagram to the part number; Part No. is what you write on the order; Q’ty tells you how many; S.No. locks the part to your serial number range. You need that last one because Kubota made running changes. Without the serial range, you can end up with a piston that doesn’t match your crankcase.

I’ve torqued enough head bolts to know that a 50-cent part ordered wrong costs you an hour of labor. This catalog covers the engine from crankcase to cylinder head, including the valve train, camshaft assembly, and fuel system. The cylinder head section alone lists the head gasket, valve guides, seals – everything down to the glow plug nozzle. The index on page 2 groups everything by system: ENGINE, FUEL SYSTEM, ELECTRICAL, CLUTCH, TRANSMISSION, etc. You flip to the right chapter, find the exploded drawing, and pull the Ref.No. Simple, fast, accurate.

For other Kubota powerplants, check the Kubota V3300-T-E2B-EPS-1 Parts Catalog – 53-Page OEM Parts Breakdown or the Kubota YU4210, YW0981 Parts Catalog – 274-Page OEM Parts Breakdown. If you need deck parts, the Kubota RCK60-27B Parts Catalog – 27-Page OEM Breakdown covers that.

What This 237-Page Parts Catalog Covers

Every subsystem is broken into its own chapter with a dedicated exploded view and part list. You get the engine block (CRANKCASE, OIL PAN, CYLINDER HEAD, GEAR CASE, HEAD COVER, MAIN BEARING CASE, CAMSHAFT AND IDLE GEAR SHAFT, PISTON AND CRANK SHAFT, FLYWHEEL, FUEL CAMSHAFT AND GOVERNOR SHAFT, STOP SOLENOID, INJECTION PUMP, GOVERNOR, SPEED CONTROL PLATE, NOZZLE HOLDER AND GLOW PLUG). Then the VALVE AND ROCKER ARM, INLET MANIFOLD, EXHAUST MANIFOLD, AIR CLEANER (single and double), MUFFLER, and both upper and lower gasket kits – each with its own part number. The fuel system runs from the ACCELERATOR LEVER through the FUEL TANK, FUEL PIPE, and FUEL FILTER. Cooling includes WATER FLANGE AND THERMOSTAT, WATER PUMP, FAN, WATER PIPE, RADIATOR. Electrical: ALTERNATOR, DYNAMO, STARTER, BATTERY, PANEL BOARD, lights, and full ELECTRICAL WIRING. Powertrain: CLUTCH (rod, pedal, housing), FRAME, TRANSMISSION CASE, DIFFERENTIAL GEAR CASE, REAR AXLE CASE, shafts (CLUTCH SHAFT/PROPELLER SHAFT, 2ND/3RD/4TH, 5TH/PTO, MID PTO), REAR DIFFERENTIAL, FRONT WHEEL PROPELLER SHAFT, MAIN GEAR SHIFT FORK, REAR AXLE, BRAKE, PARKING BRAKE LEVER, shift levers. Steering: STEERING HANDLE, STEERING CONTROLLER with component parts. Hydraulics: HYDRAULIC PUMP, HYDRAULIC OIL LINE (suction and steering), FLOW DIVIDER VALVE, HYDRAULIC CYLINDER CASE, CONTROL VALVE, LIFT ROD, LOWER LINK, TOP LINK. Body: FRONT GRILLE, HOOD(BONNET), SIDE COVER, FENDER, SEAT SUPPORT, SEAT, STEP, ROPS. Wheel options: FRONT (5.00-10), REAR (9.5-16, 33×12.5-15, 31×15.5-15). And the options section: STARTER RELAY KIT, LABEL, ACCESSORIES AND SERVICE PARTS. It’s all there, organized the way Kubota intended.

Cylinder Head and Valve Train – Factory Part Numbers

Under the CYLINDER HEAD chapter, you get the head gasket part number, the valve guides, valve springs, retainers, and the NOZZLE HOLDER assembly. The VALVE AND ROCKER ARM section lists the rocker arms, shafts, push rods, and the intake/exhaust valves with their part numbers and quantities. If you’re rebuilding a head, this is the one source you trust. The column “I/C” (interchangeability) tells you if a later part supersedes an older one – marked with a ↔ or # symbol. That saves you from buying a part that won’t swap. Aftermarket catalogs rarely give you that detail.

Fuel System and Camshaft – Finding the Right Components

The FUEL CAMSHAFT AND GOVERNOR SHAFT chapter shows the camshaft lobes, the governor linkage, and the spring. The INJECTION PUMP section gives you the pump assembly part number and all internal seals. The GOVERNOR and SPEED CONTROL PLATE parts are listed separately – critical if you’re chasing a surging idle. The FUEL TANK includes the cap, strainer, and sending unit part numbers. The FUEL PIPE list shows the exact lines from tank to filter to pump. And the FUEL FILTER components – don’t guess the cartridge number; this book has it.

Why Should You Use an OEM Parts Catalog Instead of Aftermarket?

Aftermarket parts catalogs often mash multiple model years into one drawing and leave out the serial number range. The Kubota OEM book uses S.No. columns (≥ and ≤ symbols) that tie every part to your tractor’s serial number. Miss that and you could order a camshaft that has the wrong gear pitch. The “Remarks” column also flags country-specific parts – e.g., [CA] for Canada, [FR] for France. The parts I/C codes (↔, #, ←, →) tell you if a later part works back to older serial numbers. You don’t get that on a generic website. Trust the factory book. The [LINK_ID_EXT_0] notes that original equipment manufacturers maintain tighter tolerances – and that applies to part numbering too. Referencing [LINK_ID_EXT_1] reinforces why you want the exact OEM number.

3 Reasons to Ditch Third-Party Part Lists

One: aftermarket lists combine multiple revisions into one generic number, so you can’t be sure the part matches your engine build date. Two: they omit the I/C interchange codes, meaning you could buy a discontinue part when a superseded number exists. Three: the drawings are often blurry scans, not the crisp OEM line art. This parts catalog gives you clean diagrams, precise part numbers, and the serial number range. That’s three reasons to stick with what Kubota printed.

Decoding the Column Headings: Ref.No, Part No., Description, Q’ty, S.No., I/C, Remarks

Page 1 spells it out: Ref.No points to the figure number on the facing drawing. Part No. is the alphanumeric part identifier. Description is what the part is (e.g., “BOLT, FLANGE”). Q’ty is how many you need per assembly. S.No. shows the serial number range – a greater-than-or-equal symbol means your tractor’s serial must be at least that number; a lesser-than-or-equal means at most. The I/C column uses arrows: ↔ for interchangeable both ways, # for not interchangeable, ← for new part replaces old but old won’t work in new. Remarks flags country exceptions (e.g., EXCEPT [CA]). Use these columns, and you’ll never order the wrong injector nozzle again.

Frequently Asked Questions

Does this parts catalog include the part numbers for the fuel injection pump?

Yes. The INJECTION PUMP chapter lists the pump assembly and all internal components with factory part numbers.

How do I use the reference numbers on the exploded diagrams to find the right part?

Each diagram has a Ref.No next to the part. Look at the facing page for that Ref.No – it will give you the Part No., Description, Q’ty, and S.No. range. Check your tractor’s serial number against the S.No. column to confirm the part fits. If the I/C column shows a ↔ symbol, the part works for older and newer serial numbers. If it shows #, the part is specific to that range only. Always verify the Remarks column for country code exceptions. This process takes 30 seconds and eliminates return shipping. Don’t skip the S.No. check – I’ve seen techs order a cylinder head for a B2100E that was built before a running change and it didn’t fit. Save yourself the headache.

Stop wasting time on mismatched parts. Access the Factory Manual and get the exact number every time.