Part of the Kubota Parts Manuals.
This is the Kubota B7800HSD parts catalog, a 332-page illustrated guide to every component on this compact 4WD hydrostatic diesel tractor, printed under book number 100K0716. Each assembly appears as an exploded diagram with a numbered parts list showing part numbers, quantities, and serial-range and country-code notes.Coverage includes the engine and its old-parts variants, fuel and cooling systems, the HST hydrostatic transmission and component parts, clutch, sub and center frames, front and rear axles, mid-PTO and rear PTO, brakes, steering, panel board, and electrical wiring. Interchangeability symbols flag whether a part suits earlier or later machines.Use it to identify the exact replacement part before you order, confirm a superseded number, or plan a rebuild. This PDF download is fully searchable and printable on any device.
What's Inside This Kubota B7800HSD Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Clutch & Transmission | Clutch, Clutch Rod, Clutch Pedal, Clutch Housing, Transmission Case, Clutch Shaft, HST, 2Nd Shaft, 3Rd Shaft, 4Th Shaft, Neutral Holder Link, Range Gear Shift Lever, PTO Gear Shift Lever | |
| Fuel System | Fuel Camshaft and Governor Shaft, Idle Apparatus, Injection Pump, Governor, Speed Control Plate, Nozzle Holder and Glow Plug, Nozzle Holder, Fuel Pump, Air Cleaner, Accelerator Lever, Fuel Tank, Fuel Pipe, Fuel Filter, Stop Solenoid, Speed Control Pedal | |
| Cooling System | Water Flange and Thermostat, Water Pump, Fan, Water Pipe, Radiator, Reserve Tank | |
| Engine | Crankcase, Oil Pan, Cylinder Head, Gear Case, Head Cover, Oil Filter, Dipstick and Guide, Main Bearing Case, Camshaft and Idle Gear Shaft, Piston and Crankshaft, Flywheel, Valve and Rocker Arm, Inlet Manifold, Exhaust Manifold, Muffler, Upper Gasket Kit | |
| Electrical System | Dynamo, Starter, Battery, Switch, Panel Board, Head Light, Hazard Light, Tail Light, Winker Lamp, Electrical Wiring | |
| PTO | PTO Shaft, Mid PTO, PTO Protector | |
| Rear Axle, Differential & Brakes | Rear Axle Case, Rear Differential, Rear Axle, Brake, Brake Rod, Parking Brake Lever, Brake Pedal, Differential Lock Pedal, Front Axle Case, Differential Gear Shaft, Rear Wheel | |
| Front Axle & Steering | Propeller Shaft, Front Wheel Propeller Shaft, Front Wheel Drive Lever, Front Axle Frame, Front Differential, Front Axle, Front Drive Shaft, Drag Link, Tie Rod, Steering Handle, Steering Post, Front Wheel | |
| Hydraulics & 3-Point Hitch | Hydraulic Control Lever, Hydraulic Pump, Hydraulic Oil Line, Hydraulic Cylinder, Feed Back Lever, Control Valve, 3-Point Linkage 2, Lower Link, 3-Point Linkage 1, Hitch/Drawbar | |
| Body & Operator Station | Center Frame, Sub Frame, Front Grille, Bonnet, Panel Cover, Side Cover, Shutter Plate, Fender, Floor Seat, Seat Support, Step, ROPS, Smv Emblem | |
| Other Components | Front Shaft, Speed Set Lever, Check Chain |
Every system also includes interchangeability symbols definition, a diagram, and a parts list.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Crankcase Weight | 46 kgf (101.2 lb) | p. 8 |
| Oil Pan Weight | 1.7 kgf (3.74 lb) | p. 13 |
| Cylinder Head Weight | 12.1 kgf (26.62 lb) | p. 16 |
| Oil Filter Weight | 0.4 kgf (0.88 lb) | p. 24 |
| Piston (STD) Weight | 0.4 kgf (0.88 lb) | p. 33 |
| Piston (+0.5mm) Weight | 0.415 kgf (0.913 lb) | p. 33 |
| Crankshaft Weight | 5 kgf (11 lb) | p. 33 |
| Flywheel Weight | 17.3 kgf (38.06 lb) | p. 36 |
| Injection Pump Shim Thickness | 0.20mm | p. 43 |
| Valve Inlet Weight | 0.005 kgf (0.011 lb) | p. 65 |
| Radiator Weight | 3.5 kgf (7.7 lb) | p. 98 |
Kubota B7800HSD Common Problems This Manual Covers
No-start with a blown fuse
Electrical starting problems, including blown fuses and wiring faults, are a common no-start cause on the B7800. The electrical wiring section shows the harness, fuse holder, and connections with their part numbers.
Manual Section: Electrical Wiring p. 136Engine cuts out at the fuel shutoff solenoid
A faulty fuel shutoff solenoid can block starting or stop a running engine. The stop solenoid section identifies the solenoid and its mounting parts to order a replacement.
Manual Section: Stop Solenoid p. 101Hydrostatic transmission loses drive
The HST can lose drive or weaken after fluid neglect, contamination, or overheating. The HST component parts diagrams break the unit into individually numbered pump, motor, and seal parts.
Manual Section: HST [Component Parts] p. 163Cranks but will not fire
Fuel filter restriction or air in the fuel system leaves the engine cranking without firing. The fuel filter component parts section shows the filter and related pieces to replace.
Manual Section: Fuel Filter [Component Parts] p. 894WD or front drive trouble
Uneven pulling or one side not driving points to front drive components. The front wheel propeller shaft section shows the shaft and coupling parts with their numbers.
Manual Section: Front Wheel Propeller Shaft p. 179Charging or dynamo faults
Charging irregularities can trace to the dynamo or its internal parts. The dynamo section and its component parts diagram give the numbers for a replacement or rebuild.
Manual Section: Dynamo p. 104Frequently Asked Questions
Which model does this catalog cover?
It covers the Kubota B7800HSD compact 4WD hydrostatic tractor, printed under book number 100K0716.
Is this a repair manual or a parts catalog?
It is a parts catalog. It gives exploded diagrams and numbered parts lists for ordering replacements, not step-by-step repair procedures.
Where are the hydrostatic transmission parts?
The HST section shows the assembly and the HST component parts diagrams break it down into individually numbered pump, motor, and seal parts. p. 163
Does it include the mid-PTO parts?
Yes. There are separate mid-PTO diagrams for mid-PTO and non mid-PTO machines, each with its own numbered parts list. p. 173
How will I receive this Kubota B7800HSD Parts Catalog?
Download is instant. The full 332-page searchable Parts Catalog is yours immediately after payment, ready on a laptop, tablet, or phone out in the shop.
Is this Kubota B7800HSD Parts Catalog printable?
Yes, it prints cleanly. The PDF is DRM-free, so print whatever sections you want to take out to the shop. Standard letter or A4 paper works.
Does this Kubota B7800HSD Parts Catalog include hydraulic component diagrams?
It includes exploded parts diagrams of the hydraulic components — pump, control valve, cylinder, and oil lines — with OEM part numbers and quantities. This is a parts catalog, not a workshop repair manual, so the diagrams show part identification and assembly layout rather than circuit-level hydraulic flow.
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