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Kubota B6100 Maintenance

The Kubota B6100 sub compact tractor was manufactured from 1978 to 1997. This model was designed in 4 versions: B6100E (2WD Gear), B6100D (4WD Gear), B6100HST-E (2WD Hydrostatic), and B6100HST-D (4WD Hydrostatic). The Kubota B6100 tractor is powered by 41.2 cubic inches (675 cc) Kubota D650-A 4-cycle vertical three-cylinder liquid-cooled diesel engine.

The engine has a cylinder bore of 2.52" (64 mm), piston stroke of 2.76" (70 mm), rated power of 14.3 hp (10.6 kW), and 36.5 Nm (27.1 lb-ft) of max torque at 1800 rpm. The Kubota B6100 is fitted with two transmission options: mechanical transmission with 6 forward and 2 reverse gears, or 2-range hydrostatic transmission with infinite forward and reverse gears. The maximum travel speed (forward and reverse): 9.1 mph (14.5 km/h) / 6.2 mph (10.1 km/h).

The Kubota B6100 is equipped with a manual steering system, mechanical shoe (Gear) or internal expanding (HST) brakes, 4.00x9 (2WD) or 6.00x12 (4WD) front tires, and 7.00x16 (2WD) or 8.00x16 (4WD) rear tires. The gear models have a wheelbase of 48.9" (1240 mm) with 2WD or 49.1" (1245 mm) with 4WD. The HST models have a wheelbase of 54.7" (1380 mm) with 2WD or 55.1" (1390 mm) with 4WD.

Refill Capacities
Engine oil capacity, gal (L) 1.03 (3.9)
Engine coolant capacity, gal (L) 1.2 (4.6)
Hydraulic/transmission fluid capacity (Gear), gal (L) 3.03 (11.5)
Hydraulic/transmission fluid capacity (HST), gal (L) 3.6 (13.5)
Front axle oil capacity, qts (L) 0.65 (0.60)

Recommended Oil and Fluid
Engine oil type SAE 20, SAE 30, SAE 10W, 10W-30. API Service category CC, CD
Engine coolant type Kubota Antifreeze/Coolant
Hydraulic/transmission fluid type Kubota UDT or Super UDT
Front axle oil type Gear lube SAE 80, SAE 80W-90

Service Intervals
Check battery and clean terminals Every 50 hours
Check front axle oil level Every 50 hours
Check hydraulic/transmission fluid level Every 50 hours
Lubricate axle hub bearings Every 50 hours
Change engine oil Every 75 hours
Clean engine air filter element Every 100 hours
Clean engine fuel filter Every 100 hours
Inspect and adjust fan belt Every 100 hours
Replace engine oil filter Every 150 hours
Replace hydrostatic transmission filter (HST) Every 200 hours
Replace hydraulic/transmission oil filter Every 300 hours
Change hydraulic/transmission fluid Every 300 hours
Change front axle oil Every 300 hours
Check and adjust engine idling Every 300 hours
Adjust parking and service brakes Every 300 hours
Clean radiator fins Every 500 hours
Replace engine air filter element Every 500 hours
Change engine fuel filter element Every 500 hours
Check and adjust valve clearance Every 500 hours
Flush cooling system and add new coolant Every 1000 hours

Replacement Parts
Engine oil filter part number HH150-32094
Engine fuel filter part number 1T021-43560 (Element)
Engine air filter part number 70000-11221
Hydraulic/transmission oil filter part number 66021-36390
Hydraulic/transmission filter gasket part number 04811-10300
Hydrostatic transmission filter part number HH660-36060
Drive belt part number 70000-73818



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MF 250 MF 690 MF 3060 MF 6180
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