Every figure in this 323-page Kubota B7400HSD catalog points at one thing: the correct factory part number, identified before you call the dealer. Exploded-view diagrams sit next to numbered parts lists for every system on the tractor, from crankcase and piston-crankshaft assemblies through the HST unit, front and rear differentials, hydraulic cylinder, and three-point linkage hardware. Hydraulic schematics map the suction and delivery oil lines, HST plumbing, and oil cooler circuit, with control valve component parts broken out in their own section. Check your filter specs first: the hydraulic oil filter lists at 0.39 kgf (0.858 lb), the engine oil filter at 0.195 kgf. Bookmarks let you jump straight to the system you need, and the PDF opens just as well on a phone or tablet in the shop as on a desktop.
What's Inside This Kubota B7400HSD Parts Manual
| System | Pages |
|---|---|
| Crankcase | 6-7 |
| Oil Pan | 8-9 |
| Cylinder Head | 10-11 |
| Gear Case | 12-13 |
| Head Cover | 14-15 |
| Oil Filter | 16-17 |
| Dipstick and Guide | 18-19 |
| Oil Pump | 20-21 |
| Main Bearing Case | 22-23 |
| Camshaft and Idle Gear Shaft | 24-25 |
| Piston and Crankshaft | 26-27 |
| Flywheel | 28-29 |
| Clutch | 30-31 |
| Fuel Camshaft and Governor Shaft | 32-33 |
| Engine Stop Lever | 34-35 |
| Injection Pump | 36-37 |
| Injection Pump [Component Parts] | 38-39 |
| Governor | 40-41 |
| Speed Control Plate | 42-43 |
| Nozzle Holder and Glow Plug | 44-45 |
| Nozzle Holder [Component Parts] | 46-47 |
| Fuel Pump(Mechanical) | 48-49 |
| Dynamo and Pulley | 50-51 |
| Dynamo [Component Parts] | 52-53 |
| Water Flange and Thermostat | 54-55 |
| Water Pump | 56-57 |
| Valve and Rocker Arm | 58-59 |
| Inlet Manifold | 60-61 |
| Exhaust Manifold | 62-63 |
| Hydraulic Pump | 64-65 |
| Hydraulic Pump [Component Parts] | 66-67 |
| Upper Gasket Kit | 68-69 |
| Lower Gasket Kit | 70-71 |
| Piston Kit [Option] | 72-73 |
| Air Cleaner | 74-75 |
| Muffler | 76-77 |
| Accelerator Lever [Hst Type] | 78-79 |
| Fuel Tank | 80-82 |
| Fuel Pipe | 83-84 |
| Fuel Filter [Component Parts] | 85-86 |
| Fan | 87-88 |
| Water Pipe | 89-90 |
| Radiator [Except[Au]] | 91-92 |
| Radiator [Au] | 93-94 |
| Reserve Tank [Except[Au]] | 95-96 |
| Reserve Tank [Au] | 97-98 |
| Stop Solenoid | 99-100 |
| Starter | 101-102 |
| Starter [Component Parts] | 103-104 |
| Battery [Except[Au]] | 105-106 |
| Battery [Au] | 107-108 |
| Switch [Hst Type] | 109-110 |
| Panel Board | 111-112 |
| Panel Board [Component Parts] | 113-114 |
| Head Light | 115-116 |
| Hazard Light | 117-118 |
| Tail Light | 119-120 |
| Electrical Wiring [Hst Type] | 121-122 |
| Clutch Rod | 123-124 |
| Clutch Pedal | 125-126 |
| Clutch Housing | 127-128 |
| Clutch Dipstick and Guide [Hst Type] | 129-130 |
| Front Frame | 131-132 |
| Center Frame [Hst Type] | 133-134 |
| Transmission Case [Hst Type] | 135-136 |
| Differential Gear Case | 137-138 |
| Rear Axle Case | 139-140 |
| Clutch Shaft | 141-142 |
| Propeller Shaft [Hst Type] | 143-144 |
| HST [Hst Type] | 145-146 |
| HST [Component Parts] [Hst Type] | 147-149 |
| Front Shaft [Hst Type] | 150-151 |
| PTO Shaft [Hst Type] | 152-153 |
| Mid PTO [Hst Type] | 154-155 |
| Rear Differential | 156-157 |
| Front Wheel Propeller Shaft [Hst Type] | 158-159 |
| 2Nd Shaft [Hst Type] | 160-161 |
| 3Rd Shaft [Hst Type] | 162-163 |
| 4Th Shaft [Hst Type] | 164-165 |
| Range Gear Shift Fork [Hst Type] | 166-167 |
| PTO Gear Shift Fork [Hst Type] | 168-169 |
| Differential Lock Shift Fork | 170-171 |
| Rear Axle | 172-173 |
| Brake [Hst Type] | 174-175 |
| Brake Rod 1 [Hst Type] | 176-177 |
| Parking Brake Lever [Hst Type] [Except[Au]] | 178-179 |
| Parking Brake Lever [Hst Type] [Au] | 180-181 |
| Speed Set Lever [Hst Type] | 182-183 |
| Neutral Holder Link [Hst Type] | 184-185 |
| Speed Control Pedal [Hst Type] | 186-187 |
| Range Gear Shift Lever [Hst Type] | 188-189 |
| Front Wheel Drive Lever | 190-191 |
| PTO Gear Shift Lever | 192-193 |
| Hydraulic Control Lever | 194-195 |
| Brake Pedal | 196-197 |
| Differential Lock Pedal [Hst Type] | 198-199 |
| Front Axle Case | 200-209 |
| Front Differential | 202-203 |
| Differential Gear Shaft | 204-205 |
| Bevel Gear Case | 206-207 |
| Front Axle | 210-211 |
| Front Drive Shaft [Hst Type] | 212-213 |
| Knuckle Arm | 214-215 |
| Drag Link | 216-217 |
| Tie Rod | 218-219 |
| Steering Handle | 220-221 |
| Universal Joint | 222-223 |
| Steering Controller | 224-225 |
| Steering Controller [Component Parts] | 226-227 |
| Hydraulic Oil Line(Suction) | 228-229 |
| Hydraulic Oil Line(Delivery) | 230-231 |
| Hydraulic Oil Line (HST) [Hst Type] | 232-233 |
| Hydraulic Oil Line (Oil Cooler) [Hst Type] | 234-236 |
| Hydraulic Cylinder | 237-238 |
| Hydraulic Piston/Lift Arm | 239-240 |
| Feed Back Lever | 241-242 |
| Control Valve | 243-244 |
| Control Valve [Component Parts] | 245-246 |
| 3-Point Linkage 2(Lift Rod) | 247-248 |
| Lower Link | 249-250 |
| 3-Point Linkage 1(Lower Link) | 251-252 |
| Check Chain | 253-254 |
| Drawbar | 255-256 |
| Hitch | 257-258 |
| PTO Protector [Except[Au]] | 259-260 |
| PTO Protector [Au] | 261-262 |
| Front Grille [Except[Au]] | 263-264 |
| Front Grille [Au] | 265-266 |
| Bonnet | 267-268 |
| Panel Cover | 269-270 |
| Side Cover | 271-272 |
| Shutter Plate [Except[Au]] | 273-274 |
| Shutter Plate [Au] | 275-276 |
| Lever Guide [Hst Type] | 277-278 |
| Fender [Except[Au]] | 279-280 |
| Fender [Au] | 281-282 |
| Fender Stay | 283-284 |
| Floor Seat | 285-286 |
| Seat Support | 287-288 |
| Step | 289-290 |
| ROPS | 291-292 |
| Smv Emblem | 293-294 |
| Front Wheel (6-12) [Except[Au]] | 295-296 |
| Front Wheel (21X8.00-10) [Except[Au]] | 297-298 |
| Front Wheel (6-12B) [Au] | 299-300 |
| Front Wheel (22X8.50-12) [Au] | 301-302 |
| Rear Wheel (8.3-16) [Except[Au]] | 303-304 |
| Rear Wheel (29X12.5-15) [Except[Au]] | 305-306 |
| Rear Wheel (31X15.5-15) [Except[Au]] | 307-308 |
| Rear Wheel (8-16) [Au] | 309-310 |
| Rear Wheel (31X13.5-15) [Au] | 311-312 |
| Label [Hst Type] [A] | 313-314 |
| Label [Hst Type] [Ca] | 315-316 |
| Label [Hst Type] [Au] | 317-318 |
| Accessories and Service Parts | 319-319 |
| Warking Light Kit [Option] | 320-321 |
| ROPS Kit [Option] | 322-323 |
Every system also includes a figure, a parts list, and interchangeability symbols legend.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic oil filter weight | 0.39 kgf | p. 229 |
| Engine oil filter weight | 0.195 kgf | p. 17 |
| Air filter element weight (ASSY ELEMENT) | 0.24 kgf | p. 75 |
| Air filter element weight (ELEMENT INNER) | 0.2 kgf | p. 75 |
| Fuel filter weight (ASSY FILTER FUEL) | 0.09 kgf | p. 86 |
| Fuel filter weight (FILTER) | 0.025 kgf | p. 86 |
| V BELT weight | 0 kgf | p. 88 |
| Battery weight (ASSY BATTERY) | 0 kgf | p. 106 |
| Hose water weight (6C090-58630) | 0.09 kgf | p. 90 |
| Hose water weight (6C090-58570) | 0.14 kgf | p. 90 |
| Clearance (SHIM INJECTION PUMP 16006-52092) | 0.20mm | p. 37 |
| Clearance (SHIM INJECTION PUMP 16006-52112) | 0.25mm | p. 37 |
Kubota B7400HSD Common Problems This Manual Covers
Kubota B7400HSD HST needs rebuild, can't match internal component part numbers to exploded diagram p. 147
Open the HST [Component Parts] exploded view on page 147. Each internal part has its own line-item callout; match the callout number to the parts list running through page 149. Adjusting collars come in five tolerance grades (1.5+0.015mm to +0.155mm per page 148), so identify the correct grade before ordering. Confirm part numbers against your serial number range before placing the order.
Manual Section: HST [Component Parts] [Hst Type]Hydraulic suction filter replacement due, aftermarket listings show two part numbers for the same position p. 228
Turn to the Hydraulic Oil Line (Suction) diagram on page 228. The suction filter assembly is listed as a separate line item in the parts table on page 229 (listed weight 0.39 kgf). Pull the exact part number from the exploded view callout. Aftermarket cross-references often include superseded numbers; the catalog callout is authoritative for your serial range.
Manual Section: Hydraulic Oil Line(Suction)Air filter service due, outer and inner element part numbers look interchangeable but aren't p. 74
Check the Air Cleaner parts list on page 74. The outer element (ASSY ELEMENT, 0.24 kgf) and the inner safety element (ELEMENT INNER, 0.20 kgf) carry distinct part numbers as separate line items, so order both by their own callout numbers rather than assuming one covers the other.
Manual Section: Air CleanerNeed seal kit part numbers for hydraulic lift cylinder, 3-point hitch drops under load p. 237
Locate the Hydraulic Cylinder exploded view on page 237. Seal components are listed individually in the parts table; find each by its callout number and record the exact part number for every seal and O-ring in the assembly. If the control valve is also suspect, cross-reference the Control Valve [Component Parts] on page 245, which lists internal valve seals as separate line items.
Manual Section: Hydraulic CylinderFuel filter replacement due, three separate listings for bowl, element, and complete assembly confusing p. 85
Go to the Fuel Filter [Component Parts] section on page 85. The complete assembly (ASSY FILTER FUEL, 0.09 kgf per page 86) and the bare filter element (FILTER, 0.025 kgf) appear as distinct line items with separate part numbers. Order the assembly part number when replacing the full unit; order only the element part number when swapping media inside an existing bowl.
Manual Section: Fuel Filter [Component Parts]Starter motor rebuild needed, internal brush and spring part numbers not visible on main diagram p. 103
Pull up the Starter [Component Parts] exploded view on page 103. Every internal piece including brushes, springs, bearings, and the drive pinion carries its own part number in the table on page 104. The complete starter assembly (3.6 kgf per page 102) is also listed if a full exchange is simpler. Record each callout number from the diagram before ordering to avoid receiving the wrong sub-assembly.
Manual Section: Starter [Component Parts]Frequently Asked Questions
What are the replacement specifications for hydraulic oil filter?
The hydraulic oil filter for the Kubota B7400HSD is a CARTRIDGE OIL FILTER with Part No. 66021-36060. It has a weight of 0.34 kgf (0.748 lb).
What are the replacement specifications for engine oil filter?
Kubota lists the B7400HSD engine oil filter as a CARTRIDGE OIL FILTER, Part No. 15853-32430, weighing 0.195 kgf (0.429 lb).
How will I receive this Kubota B7400HSD Parts Catalog?
A 323-page Parts Catalog in searchable PDF format, available the moment you complete checkout. Open it on a computer, tablet, or phone. No shipping wait.
Am I able to print pages from this Kubota B7400HSD manual?
None at all. The PDF is DRM-free, so print whatever sections you need for the shop. Standard letter or A4 paper works.
Are there hydraulic schematics in this Kubota B7400HSD manual?
Yes, this Kubota B7400HSD Parts Catalog includes hydraulic system diagrams, circuit schematics, and component specifications.
Document Quality
This document is an OCR'd scanned PDF, allowing you to search and copy text from its pages. The text quality is crisp and generally easy to read throughout. Diagrams and illustrations are clear raster images, with all labels remaining perfectly readable. Pages are clean with no noticeable scan artifacts, stains, or marks, though some exhibit minor skewing. There are no blank or filler pages, with all content directly related to parts information.
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