Kubota B7100 Overview
The Kubota B7100 is a compact B-series utility tractor built from 1976 through 1985. It is a small, light machine by farm-tractor standards, with a 46.5 cubic inch diesel engine, 13 claimed PTO horsepower, and an operating weight of 1,080 pounds.
The working setup is simple and useful: an unsynchronized gear transmission with 6 forward and 2 reverse speeds, a transmission-driven 540-rpm rear PTO, Category I rear hitch, open-center hydraulics, and a 400-pound rear lift rating. That makes the B7100 more of a small-acreage, mowing, loader, tiller, and chore tractor than a heavy field tractor.
Configuration matters on this model family. Gear-drive B7100 and B7100D material should not be blended with B7100HST/HSD hydrostatic sources unless the tractor and document coverage match.
Kubota B7100 Quick Answers
- Production yearsThe Kubota B7100 was produced from 1976 through 1985.
- PowerThe Kubota B7100 is rated at 16 engine horsepower and 13 claimed PTO horsepower.
- EngineThe Kubota B7100 engine displacement is 46.5 ci 0.8 L.
- PTO and hitchThe Kubota B7100 has a 540 (1.375) rear PTO and a Category I rear hitch.
- Service capacityPublished capacities include 4.1 quarts of engine oil, 12.2 quarts of transmission oil, and 3.6 gallons for the hydraulic system.
Engine and Power
The B7100 engine is a small Kubota diesel with 46.5 cubic inches of displacement, glow-plug preheating, and a 2,800-rpm rated speed. Use the 13 claimed PTO horsepower figure as a compact-tractor rating, not as a heavy tillage benchmark.
Diesel engine
Kubota D750-A / diesel / 3-cylinder / liquid-cooled
| Displacement | 46.5 ci 0.8 L |
|---|---|
| Bore Stroke | 2.68x2.76 inches 68 x 70 mm |
| Power Gross | 16 hp 11.9 kW |
| Air Cleaner | dry |
| Pre Heating | glow plugs |
| Rated Rpm | 2800 |
| Firing Order | 1-2-3 |
| Starter Volts | 12 |
| Starter Power | 1.1 hp 0.8 kW |
| Coolant Capacity | 4.9 qts 4.6 L |
Manufacturer
Manufacture years
Transmission
The B7100 gear-drive tractor uses an unsynchronized gear transmission with 6 forward and 2 reverse speeds and a dry-plate clutch. Hydrostatic B7100 variants should be treated separately when matching transmission parts or service information.
6-speed unsynchronized gear
| Type | unsynchronized gear |
|---|---|
| Gears | 6 forward and 2 reverse |
| Clutch | dry plate |
| Transmission Oil Capacity | 12.2 qts 11.5 L |
PTO and Hitch
The rear PTO is transmission driven and rated at 540 rpm, with a Category I rear hitch and 400-pound rear lift rating. That is enough for many small implements, but implement weight, PTO demand, ballast, and tire setup still matter on a tractor this light.
Rear PTO
Rear PTO type
Engine RPM
Rear hitch
Rear lift
Hydraulics
The B7100 hydraulic specs are modest: open-center hydraulics, 3 gpm pump flow, and a 3.6-gallon hydraulic system capacity. Good pump condition and the right implement setup matter more here than on a larger utility tractor with more hydraulic reserve.
Type
Capacity
Pump flow
Fluids, Battery, and Service Facts
Key B7100 service capacities are 4.1 quarts of engine oil, 12.2 quarts of transmission oil, 3.6 gallons for the hydraulic system, and 4.9 quarts of coolant. The electrical system is 12 volt with negative ground; filter, belt, and battery replacements still need to be matched by suffix, serial range, and parts source.
Fuel tank
Engine oil capacity
Hydraulic system
Battery volts
Battery Ah
Tires and Dimensions
Tire and dimension values can vary by wheel, axle, and configuration.
Wheelbase
Weight
Length
Width
Front tire
Electrical
Electrical rows are included when documented.
Ground
Battery volts
Serial Number Lookup
The B7100 serial number is on the left side of the clutch housing, and the year table runs from 1976 through 1985. Use the serial table as a starting point, then keep model suffix and transmission type in mind when matching documents or parts.
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
location
Manuals and Documents
The documents below add manual, service, and parts context for the Kubota B7100. They are useful for controls, lubrication, routine service categories, hydraulic and transmission context, and parts matching.
Match coverage carefully before relying on a document for service decisions, especially when a source covers several B-series models or separates gear-drive and hydrostatic variants.
- Kubota B5100D/B6100D/B7100D operator manualOperator manual covering the gear-drive B7100D along with related B-series models.Open manual PDF
- Kubota B5100/B6100/B7100 owners manualOwner manual covering B-series controls, operation, safety, lubrication, and routine service categories.Open manual PDF
- Kubota B5100/B7100 service manual part 1Service manual segment for mechanical systems and repair categories across related B-series tractors.Open service PDF
- Kubota B5100/B7100 service manual part 3Service manual segment with hydraulic and transmission-service context for related B-series tractors.Open service PDF
- Kubota B7100D-P parts diagramsOEM-derived parts diagrams for B7100D-P assemblies and parts matching.View parts diagrams
Parts Checks Before Ordering
Do not order Kubota B7100 parts from the model name alone. Match the part to the tractor's model suffix, drive type, gear or hydrostatic transmission, serial year, PTO equipment, and tire setup before choosing service parts.
Filters, fluids, belts, electrical parts, clutch and PTO parts, and hydraulic parts can vary by setup. Exact part numbers need a parts catalog, manual, or trusted supplier source before they become recommendations.
Accuracy Note
Tractor specifications can vary by year, region, factory configuration, installed equipment, and later repairs. Match serial range, engine, transmission, PTO setup, and model code before ordering parts or doing service work.