Part of the Kubota Operator Manuals.
Kubota built this BX1870D, BX2370D, BX2670D Operator Manual (OEM #K2771-7121-1) to keep your sub-compact tractor working safely and on schedule. The maintenance chart is tiered, running from daily walk-arounds through 3,000-hour injection pump checks, and it sits alongside fluid capacity specs and tire inflation pressures. Operating procedures cover PTO selection, three-point hitch setup, differential lock engagement, and slope terrain technique. Instrument panel callouts explain every switch and indicator; foldable ROPS adjustment steps, cold-weather starting, and a storage and engine troubleshooting section fill out the rest. Torque front wheel bolts to 149.2 to 179.0 N-m (110 to 132 lbf-ft) and rear bolts to 108.5 to 130.2 N-m. Change the oil filter every 200 hours. Search any spec by keyword instead of digging through forum threads.
What's Inside This Kubota BX1870D, BX2370D, BX2670D Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Safe Operation | - | Before Operating the Tractor, Cab, ROPS (Service As Required, Storage, Troubleshooting, Options, Appendices, Index), Parking the Tractor, Operating the P.T.O., Using 3-Point Hitch |
| Danger, Warning and Caution Labels | - | Part No. K2651-6557-2, Part No. K2561-6548-2, Part No. K2561-6552-2, Part No. K1272-6585-2, Part No. K2591-6557-2, Part No. K2581-6554-1, Part No. K2581-6555-1 |
| Servicing of Tractor | - | Part No. K1221-6118-1, Part No. K2591-6564-2, Warranty, Scrapping the Tractor and Its Procedure, Care of Danger, Warning and Caution Labels |
| Specifications | - | PTO Power, Engine, Capacities, Dimensions, Weight, Traveling System |
| Implement Limitations | - | Tread, Actual Figures, Forestry Application, Front Loader, Rear Ballast, Implement As Counter Weight |
| Instrument Panel and Controls | - | Instrument Panel, Switches and Hand Controls |
| Pre-Operation Check | - | Daily Check, Operating the Engine, Starting the Engine, Block Heater, Stopping the Engine |
| Operating the Tractor | - | Operating New Tractor, Changing Lubricating Oil for New Tractors, Boarding and Leaving the Tractor |
| Parking | - | Hourmeter/Tachometer |
| Operating Techniques | - | Differential Lock, Operating the Tractor on a Road, Operating on a Slopes and Rough Terrain, Transport the Tractor Safely, Directions for Use of Power Steering |
| PTO | - | PTO Operation (PTO Select Lever, Rear PTO, Mid-PTO, Mid-Rear PTO), PTO Clutch Lever, PTO Shaft Cover and Shaft Cap |
| Three-Point Hitch & Drawbar | - | Stationary PTO, PTO Drive Shaft, Use Holder Plate to Hold Lower Link Higher While Mowing with Mid-Mount Mower Only Over Uneven Terrain |
| Point Hitch | - | Attaching and Detaching Implements, Lifting Rod, Top Link, Check Chains, Hitch |
| Tires, Wheels and Ballast | - | Tires (Inflation Pressure, Dual Tires), Wheel Tread (Front Wheels, Rear Wheels), Ballast (Front Ballast, Front End Weights, Rear Ballast, Liquid Ballast in Rear Tires) |
| Maintenance | - | Service Intervals, Lubricants, Fuel and Coolant, Engine Oil, Fuel, Transmission Oil |
| Periodic Service | - | How to Open the Hood (Engine Cover) |
| Storage | - | Tractor Storage, Removing the Tractor From Storage, Engine Troubleshooting |
| Options | - | Tires, Arm Rest, Speed Set Device, Grille Guard, Engine Block Heater, Rear Work Light, Front End Weights, Rear Wheel Weight |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Front wheel bolt torque | 149.2 to 179.0 N-m (15.2 to 18.3 kgf-m, 110 to 132 lbf-ft) | p. 37 |
| Rear wheel bolt torque | 108.5 to 130.2 N-m (11.1 to 13.3 kgf-m, 80 to 96 lbf-ft) | p. 37 |
| Engine oil filter tightening torque | additional 1/2 turn only (by hand) | p. 40 |
| Engine oil filter replacement interval | every 200 Hr | p. 32 |
| Transmission oil filter tightening torque | additional 1/2 turn only (by hand) | p. 41 |
| Transmission oil filter replacement interval | every 200 Hr | p. 32 |
| Air cleaner element cleaning compressed air pressure | under 205kPa (2.1kgf/cm², 30psi) | p. 38 |
| Air cleaner element replacement interval | Once yearly or after every sixth cleaning, whichever comes first | p. 38 |
| Fuel filter replacement interval | every 500 Hr | p. 32 |
| BX1870D | ||
| Coolant capacity | 2.9 L (3.06 U.S.qts.) | p. 33 |
| BX2370D | ||
| Coolant capacity | 3.1 L (3.3 U.S.qts.) | p. 33 |
Kubota BX1870D, BX2370D, BX2670D Common Problems This Manual Covers
After first oil change on a new Kubota BX tractor, engine oil reads low or puddle appears underneath p. 40
Confirm the old filter gasket is not still stuck to the engine block before installing the new filter. Tighten the new filter by hand until the gasket seats, then turn an additional 1/2 turn only (page 40). After starting, inspect around the filter and drain plug for seeps, then verify oil level on the dipstick.
Manual Section: Periodic ServiceAfter a hydraulic filter service, transmission fluid reads low on the dipstick p. 41
Read the dipstick immediately after installation; the fluid level will drop slightly as the new filter fills (page 41). Run the engine briefly, shut down, and recheck. If the level is below the prescribed mark, add fluid in small increments; the full transmission case capacity is 11.6 L (3.1 US gals.). Inspect the new filter seal for any seepage.
Manual Section: Periodic ServiceDuring mowing or loader work in summer heat, temperature gauge climbs into the red p. 36
Clean the radiator screen daily before starting work (page 36). Check coolant level in the overflow reservoir with the engine cold. Inspect the radiator core for packed debris and clear it with compressed air. Verify the fan belt deflects 7 to 9 mm when pressed at the midpoint (page 39).
Manual Section: Periodic ServiceEngine loses power in dusty conditions or air cleaner restriction warning light illuminates p. 38
Remove the air cleaner primary element and inspect it for dust or debris buildup. Clean from inside out using compressed air at under 205 kPa (30 psi), never exceeding that limit (page 38). Replace the element once yearly or after every sixth cleaning. Reinstall the pre-cleaner cap firmly and check the body seal for any gaps.
Manual Section: Periodic ServiceDuring loader work and mowing, unusual vibration and knocking come through the seat and controls p. 15
Walk around the tractor before each session and check all visible pins, bolts, and implement attachment points for looseness (page 15). If wheel wobble is present, verify front wheel bolt torque at 149.2 to 179.0 N-m (110 to 132 lbf-ft) and rear wheel bolts at 108.5 to 130.2 N-m (80 to 96 lbf-ft) on page 30.
Manual Section: Pre-Operation CheckFrequently Asked Questions
What are the replacement specifications for engine oil filter?
Replace the engine oil filter every 200 hours (page 44). Coat the rubber seal of the new filter with clean engine oil, then spin it on until it meets the mounting surface and add a final 1/2 turn by hand (page 40). Use only a KUBOTA genuine filter; substitutes risk serious engine damage (page 40).
What are the replacement specifications for hydraulic/transmission filter?
Plan on a new transmission oil filter every 200 hours (page 44). Wipe clean transmission oil onto the rubber seal, thread the filter on until it touches the mounting surface, then give it one more 1/2 turn by hand (page 41). Stick with a KUBOTA genuine filter to avoid serious damage to the hydraulic system (page 41).
What should I check if the temperature gauge climbs into the red during operation?
Clean the radiator screen daily before starting work (page 36). Check coolant level in the overflow reservoir with the engine cold. Inspect the radiator core for packed debris and clear it with compressed air. Verify the fan belt deflects 7 to 9 mm when pressed at the midpoint (page 39).
What are the correct wheel bolt torque specifications for the BX1870D, BX2370D, BX2670D?
Walk around the tractor before each session and check all visible pins, bolts, and implement attachment points for looseness (page 15). Verify front wheel bolt torque at 149.2 to 179.0 N-m (110 to 132 lbf-ft) and rear wheel bolts at 108.5 to 130.2 N-m (80 to 96 lbf-ft) on page 30.
How quickly can I access this manual after?
A 49-page Operator Manual in searchable PDF, ready to download the moment checkout completes. Open it on a computer, tablet, or phone with no shipping wait.
Can I print specific sections of this manual?
No restrictions: the PDF is DRM-free. Print whatever sections you want to carry out to the shop. Standard letter or A4 paper both work.
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