Kubota B7800 Specs
| Engine Detail | |
| Kubota V1505-E-D16 | |
| diesel | |
| 4-cylinder | |
| liquid-cooled | |
| Displacement | 91.5 ci 1.5 L |
| Bore/Stroke | 3.07×3.09 inches 78 x 78 mm |
| Power (gross) | 30 hp 22.4 kW |
| Air cleaner | dry |
| Rated RPM | 2600 |
| Starter volts | 12 |
| Oil capacity | 4.3 qts 4.1 L |
| Coolant capacity | 4.7 qts 4.4 L |
| Transmission | |
| Type | hydrostatic |
| Gears | infinite forward and reverse (3-range) |
| Oil capacity | 15.3 qts 14.5 L |
| Kubota B7800 Power | |
| Engine (gross) | 30 hp 22.4 kW |
| PTO (claimed) | 22 hp 16.4 kW |
| Mechanical | |
| Four-wheel drive | |
| Final drives | spur gear |
| Differential lock | mechanical rear |
| Power steering | |
| Wet disc brakes | |
| Two-post fixed ROPS. Folding ROPS optional. | |
| Hydraulics | |
| Type | open center |
| Pump flow | 6.4 gpm 24.2 lpm |
| Total flow | 9.5 gpm 36.0 lpm |
| Steering flow | 3.1 gpm 11.7 lpm |
| Power Take-off (PTO) | |
| Rear PTO | live |
| Rear PTO Type | 540 (1.375) |
| Engine RPM | 540@2600 |
| Mid PTO | live * |
| Mid PTO Type | 2500 (Kubota 10-spline) |
| Engine RPM | 2500@2578 |
| Electrical | |
| Ground | negative |
| Battery CCA | 443 |
| Battery volts | 12 |
| Tractor hitch | |
| Rear Type | I |
| Control | quarter-inching valve |
| Rear lift (at ends) | 1655 lbs 750 kg |
| Rear lift (at 24″/610mm) | 1300 lbs 589 kg |
| Kubota B7800 Tires | |
| Ag front | 7-12 |
| Ag rear | 12.4-16 |
| Lawn/turf front | 24×8.50-14 |
| Lawn/turf rear | 13.6-16 |
| Industrial front | 23×8.50-14 |
| Industrial rear | 12.4-16 |
| Dimensions | |
| Wheelbase | 65.6 inches 166 cm |
| Length | 99.2 inches 251 cm |
| Width | 53.8 inches 136 cm |
| Height (ROPS) | 78.5 inches 199 cm |
| Weight | 1741 lbs 789 kg |
| Ground clearance | 14.6 inches 37 cm |
Kubota B7800 Attachments
| Attachment overview | |
| 60″ mid-mount mower deck | |
| 72″ mid-mount mower deck | |
| Snowblower | |
| Blade | |
| Front-end loader | |
| Backhoe |
| Kubota B4672A Backhoe | |
| Backhoe type | Kubota B4672A Backhoe |
| Weight | 845 lbs 383 kg |
| Transport height | 67.7 inches 171 cm |
| Digging depth | 73.9 inches 187 cm |
| Reach from pivot | 98.1 inches 249 cm |
| Loading height | 65 inches 165 cm |
| Bucket Rotation | 180° |
| Swing Arc | 180° |
| Bucket force | 2950 lbs 1338 kg |
| Dipperstick force | 1740 lbs 789 kg |
| Kubota BL4690A Backhoe | |
| Backhoe type | Kubota BL4690A Backhoe |
| Weight | 890 lbs 403 kg |
| Transport height | 76 inches 193 cm |
| Digging depth | 90.2 inches 229 cm |
| Reach from pivot | 116.5 inches 295 cm |
| Loading height | 78.9 inches 200 cm |
| Bucket Rotation | 180° |
| Swing Arc | 180° |
| Bucket force | 2950 lbs 1338 kg |
| Dipperstick force | 1740 lbs 789 kg |
Kubota B7800 Problems
The Kubota B7800, like many tractors, can face a range of issues. Here are some common problems reported by users:
Starting Issues:
- Won’t Start: A common complaint is that the B7800 won’t start even when the battery is fully charged. Users mention that the glow plug light turns on, but the starter doesn’t engage. This could be due to problems with the safety switches, such as the forward/reverse pedal switch, which needs to be in the neutral position for the engine to crank. Dirt buildup or mechanical failure in these switches can prevent the tractor from starting.
- Intermittent Cranking: Some users have reported issues where the tractor either won’t crank at all or stops cranking when the operator shifts their weight off the seat. This may be caused by a faulty microswitch that senses the position of the forward/reverse pedal.
Handling and Performance Problems:
- Pulling to the Right in 4WD: In four-wheel drive mode, some B7800 models tend to pull sharply to the right. This could be due to uneven tire pressure or a mechanical problem within the drive system.
- Overheating Hydraulics: Another reported issue is the hydraulic system overheating after prolonged use, like during mowing. This can happen even after replacing the fluid and filter with the recommended Kubota products, indicating there may be a deeper issue within the hydraulic system.
Engine Performance Issues:
- Engine Stops Suddenly: Some operators have noticed that while the engine runs smoothly, it can suddenly shut off, only to restart right away. This could be related to a fuel shut-off solenoid or other fuel delivery problems.
- Throttle Problems: There have been reports that the engine cuts off when using the foot throttle, though it works fine with the hand throttle. This points to a possible issue with the throttle linkage or control system.
These common issues emphasize the need for regular maintenance and careful attention to the mechanical components of the Kubota B7800 to keep it running smoothly.
Kubota B7800 Review
The Kubota B7800 is a compact tractor that users generally speak highly of, praising its reliability, power-to-weight balance, and overall ease of use. Here’s a summary of what people have shared based on their experiences:
Overall Impressions:
- Dependability: Many users consistently describe the B7800 as a reliable and solidly built tractor. Whether they’re mowing, landscaping, or doing light farm work, they appreciate its steady performance.
- Power and Size: The tractor’s excellent power-to-weight ratio stands out, allowing it to handle a variety of tasks without being too heavy. This is especially helpful for those working in tight spaces or on softer ground where heavier equipment might cause damage.
Pros:
- Easy Loader Attachment: The front loader is simple to remove, making it versatile for different tasks.
- Good Fuel Efficiency: Users have noted that the B7800 is fuel-efficient, which is a big plus for those using it over long periods.
- User-Friendly Controls: The controls and pedal layout are considered intuitive, making it easy for operators to handle tasks smoothly.
Cons:
- Dump Height: Some users have mentioned that the loader’s dump height could be higher, which can be limiting in certain situations.
- Quarter-Inching Valve Issues: A common issue reported is the quarter-inching valve, which may get stuck, leading to slow drift and unintentional lowering of implements.
- Lighting: The factory-installed lights are often considered inadequate, with many opting to upgrade to LED lights for better visibility.
Summary:
All in all, the Kubota B7800 is well-regarded for its dependability and efficiency, making it a popular choice for homeowners and small-scale farmers. Although there are a few minor drawbacks, like the dump height and lighting, the tractor’s overall performance and ease of use tend to outweigh these issues. Many owners express long-term satisfaction, stating that it effectively meets their needs.