OEM catalog #100K0032 for the Kubota B6100HST-D, 138 pages in searchable PDF with bookmarks. Exploded-view parts lists span crankcase internals, injection pump, hydrostatic transmission, control valve, and the full 4WD front axle assembly. hydraulic parts diagrams cover the HST circuit and lift system. Cross-references run through drivetrain, brake, steering, and chassis sections. Factory-listed weights appear throughout each component entry (front axle gear case LH at 4.5 kgf, main bearing case at 0.8 kgf, cylinder head gasket at 0.064 kgf), so you can verify you're looking at real OEM data, not aftermarket guesses. Wrong parts on your bench cost money and time. Search by keyword or jump to any bookmark, pull the exact part number, and order right the first time.
What's Inside This Kubota B6100HST-D Parts Manual
| System | Pages |
|---|---|
| Crankcase | - |
| Cylinder Head | - |
| Gear Case | - |
| Bearing Case | - |
| Breather | - |
| Inlet Manifold | - |
| Valve Rocker Arm | - |
| Head Cover | - |
| Camshaft | - |
| Piston Crankshaft | - |
| Flywheel | - |
| Nozzle Holder | - |
| Injection Pump | - |
| Speed Control Plate | - |
| Governor | - |
| Dynamo | - |
| Clutch | - |
| Name Plate | - |
| Starter | - |
| Oil Pressure Pump | - |
| Transmission Case | - |
| Case Cover | - |
| Axle Case | - |
| Wheel Hub [America] | - |
| Clutch Rod | - |
| 1st Shaft 4th Shaft | - |
| 2nd Shaft Front Wheel Shaft | - |
| 3rd 5th PTO Shaft | - |
| Differential | - |
| Aux. Speed Change | - |
| Rotary Speed Change | - |
| Brake | - |
| Hydraulic Pipe | - |
| Hydrostatic Transmission | - |
| Control Valve | - |
| Hydraulics 1 | - |
| Hydraulics 2 | - |
| Steering | - |
| Brake Rod | - |
| Release Rod | - |
| Speed Change 1 | - |
| Speed Change 2 | - |
| Seat | - |
| Clutch Housing | - |
| Front Wheel Support | - |
| Radiator | - |
| Fender | - |
| Bonnet | - |
| Muffler | - |
| Fuel Tank | - |
| Battery | - |
| Panel | - |
| Air Cleaner | - |
| Fuel Filter | - |
| Front Axle Case [Dp] | - |
| Front Wheel Gear Case [Dp] | - |
| Knuckle Arm [Dp] | - |
| Front Differential [Dp] | - |
| Front Axle Joint [Dp] | - |
| Drive Shaft [Dp] | - |
| 3-Point Linkage [Ep Dp] | - |
| Speed Change 2 [Option] | - |
| Accessory and Service Parts | - |
Every system also includes a diagram and a parts list.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Weight of CASE GEAR LH | 4.5 kgf | p. 124 |
| Weight of PIPE SUCTION (HST) | 0.3 kgf | p. 78 |
| Weight of FILTER (Fuel Tank) | 0.01 kgf | p. 112 |
| Weight of SEAL OIL (CRANKCASE) | 0.01 kgf | p. 6 |
| Weight of CASE MAIN BEARING 1 | 0.8 kgf | p. 12 |
| Weight of GASKET CYLINDER HEAD | 0.064 kgf | p. 8 |
Kubota B6100HST-D Common Problems This Manual Covers
Kubota B6100HST-D front wheel gear case failed, need correct internal gear and bearing part numbers p. 123
Open the Front Wheel Gear Case [Dp] exploded view on page 123. Identify each failed component by position number, then cross-reference the parts list on page 124. The left-side gear case assembly (CASE GEAR LH) weighs 4.5 kgf; use that as a cross-check when verifying you have the correct casting. Match your serial number range before ordering. Left and right cases are not interchangeable.
Manual Section: Front Wheel Gear Case [Dp]Hydrostatic transmission lost drive, need to identify which internal HST components to order p. 77
Turn to the Hydrostatic Transmission exploded view on page 77. Locate the suction pipe assembly (PIPE SUCTION, 0.3 kgf per the parts list on page 78) and map surrounding components by position number. Cross-reference the Control Valve parts list on page 79 if the fault sits in the valve block rather than the pump body. Order by position number, not description alone; HST internals share similar names across Kubota models.
Manual Section: Hydrostatic Transmission4WD not engaging, front axle drivetrain parts needed but unsure which assembly to order p. 121
Review the Front Axle Case [Dp] diagram on page 121, then the Front Differential [Dp] on page 127 and Drive Shaft [Dp] on page 131 to isolate which sub-assembly holds the failed part. For knuckle and steering components, see page 125. Each section carries its own parts list. Identify the position number in the exploded view before ordering to avoid buying a full assembly when only one internal component is worn.
Manual Section: Front Axle Case [Dp]Transmission case seals and gaskets leaking, can't confirm correct part numbers for the rear axle area p. 51
Start with the Transmission Case parts list on page 51, then check the Axle Case on page 55 and Case Cover on page 53 for gasket and seal positions. Each exploded view lists individual seal and gasket part numbers by position. Verify the crankcase oil seal part number against page 6 (SEAL OIL, 0.01 kgf) if the leak is at the engine-to-transmission interface rather than inside the gearbox.
Manual Section: Transmission CaseDifferential lock or differential components worn, need part numbers for internal diff parts p. 67
Consult the Differential exploded view on page 67 for the rear differential parts list. For the front axle differential on 4WD models, use the Front Differential [Dp] diagram on page 127. Cross-check position numbers between both diagrams; front and rear differential internals are not interchangeable despite similar appearance. Note the serial number suffix ([Dp] denotes 4WD) before placing any order.
Manual Section: DifferentialFuel system filters need replacement, unclear which filter part numbers apply to tank versus inline p. 119
Locate the Fuel Tank section on page 111 for the in-tank filter (FILTER, 0.01 kgf per page 112; use that weight to confirm you have the correct part in hand). For the inline fuel filter assembly, check the Fuel Filter parts list on page 119. Both sections carry separate part numbers. Ordering the wrong filter is a common mistake when only one part number is referenced.
Manual Section: Fuel FilterFrequently Asked Questions
What type of hydraulic control does the Kubota B6100HST 3-point hitch use?
The B6100HST 3-point hitch runs a lever-controlled hydraulic system. The control valve assembly includes an "ASSY VALVE CONTROL" (part number 66711-36200) paired with a "LEVER CONTROL" (part number 66711-36250).
What are the replacement specifications for front axle gear case parts?
Each front axle gear case part is listed with its part number, description, quantity, and weight. For example: "CASE GEAR LH" is part number 66711-56410, quantity 1, weighing 4.5 kgf (9.9 lb). The "BOLT" (66591-56440) weighs 0.02 kgf (0.044 lb), and "BUSH KING PIN" (66711-56470) weighs 0.064 kgf (0.1408 lb).
What are the replacement specifications for hydrostatic transmission components?
Each HST component is listed with part number, description, quantity, and weight. The main "ASSY HST" is part number 66204-36142, quantity 1, at 0 kgf (0 lb). The "STRAINER" (66204-36210) weighs 0.367 kgf (0.8074 lb), and the "PIPE SUCTION (HST)" (66204-36190) weighs 0.3 kgf (0.66 lb).
How will I receive this Kubota B6100HST-D Parts Catalog?
It's a 138-page searchable PDF, delivered instantly after checkout. Open it on your laptop, tablet, or phone and bring it straight to the shop floor.
Am I able to print pages from this Kubota B6100HST-D manual?
Yes. No DRM or copy protection. Print the whole catalog or just the pages you need. Any home or office printer works.
Does this Kubota B6100HST-D manual include hydraulic schematics?
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.
Document Quality
This document is a scanned PDF with an optical character recognition (OCR) layer, allowing you to search and copy the full text. The text quality is crisp and clear throughout, making it easy to read. Diagrams and illustrations are raster images, but their labels are generally readable. Pages are clean with no significant scan artifacts or marks, though some are slightly skewed. One page explicitly states "IMAGE NOT AVAILABLE" as a placeholder.
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