Kubota B2650 / B3350 service schedule
Kubota B series · Emission-regulated version; build years not found, check your handbook
Covers the Kubota B2650 / B3350 (hydrostatic).
Every maker's service job for the Kubota B2650 / B3350, counted in hours, with the oils, filters and parts each one needs. Add your tractor to Farmyard Workshop and it works out what's due from your hours and dates, and keeps the service history.
Track your B2650 / B3350 for freeVersions: B2650 (4.0 L engine oil); B3350 / B3350SU (4.8 L engine oil, turbo)
Service intervals
| Job | When |
|---|---|
| Grease points (50-hour list) | every 50 hours |
| Wheel bolt torque | every 50 hours |
| Air cleaner element | every 100 hours or every year |
| Fan belt, brakes and battery | every 100 hours |
| Hoses and toe-in | every 200 hours or every 2 years |
| Engine oil and filter change | every 200 hours |
| Transmission oil filter (HST) | every 200 hours |
| Transmission fluid and hydraulic filter | every 400 hours |
| Front axle case oil | every 400 hours |
| Fuel filter | every 400 hours |
| Valve clearance | every 800 hours |
| Coolant change and system flush | every 2 years |
Service jobs and parts
Grease points (50-hour list)
Chassis · every 50 hours
The handbook lists greasing, wheel bolt torque and the engine start system check every 50 hours.
| Part | Qty | Notes | Part number |
|---|---|---|---|
| Grease | 1 | EP2 grease. Multipurpose NLGI-2 or NLGI-1 (GC-LB). Aztec Oils match: VOLCATEC LITHIUM EP 2 | check your handbook |
Step-by-step
- Stop the engine and chock the wheels.
- Grease the top link, right lift rod, speed control pedal and the other fittings in the handbook until grease overflows.
- Smear the battery terminals with grease.
Tools: Grease gun
Wheel bolt torque
Chassis · every 50 hours
Checked every 50 hours.
Step-by-step
- Check torque to the figure in your handbook.
Tools: Torque wrench
Air cleaner element
Engine · every 100 hours or every year
Clean the element every 100 hours and replace it once a year or after 6 cleanings.
| Part | Qty | Notes | Part number |
|---|---|---|---|
| Air filter element (primary) | 1 | OEM-format number listed by FridayParts, not a Kubota parts book; confirm with a Kubota dealer | 6C060-99410 |
| Secondary element | 1 | OEM-format number listed by FridayParts, not a Kubota parts book; confirm with a Kubota dealer | 32721-58242 |
Step-by-step
- Remove the element and blow clean from the inside.
- Replace on the 1-year or 6-cleanings limit.
Tools: Low-pressure air
Fan belt, brakes and battery
Chassis · every 100 hours
Fan belt tension, brake adjustment and battery condition are 100-hour checks.
Step-by-step
- Check belt deflection.
- Check and adjust the brakes.
- Check battery fluid and terminals.
Tools: Rule
Hoses and toe-in
Engine · every 200 hours or every 2 years
Hoses are checked every 200 hours and replaced every 2 years; toe-in is checked at 200 hours.
Step-by-step
- Inspect hoses and clamps.
- Check toe-in.
Tools: Tape measure
Engine oil and filter change
Engine · every 200 hours
Oil and filter are both changed every 200 hours in the handbook.
| Part | Qty | Notes | Part number |
|---|---|---|---|
| Engine oil | 1 | 10W-30 or 15W-40. 4.0 L (B2650) / 4.8 L (B3350) with filter. Aztec Oils match: EMPROTEC EHPD 10W-30 | check your handbook |
| Engine oil filter | 1 | B2650 number. OEM-format number listed by FridayParts, not a Kubota parts book; confirm with a Kubota dealer. B3350 may differ | HH150-32094 |
Step-by-step
- Warm the engine, then stop it.
- Drain the sump. Remove the old filter and make sure its gasket has gone.
- Oil the new gasket and fit the filter hand tight plus 1/2 turn.
- Refill and check the dipstick.
- Run and check for leaks.
Tools: Drain tray (8 L), Filter wrench
Transmission oil filter (HST)
Transmission · every 200 hours
The hydrostatic transmission oil filter is replaced every 200 hours.
| Part | Qty | Notes | Part number |
|---|---|---|---|
| HST filter | 1 | OEM-format number listed by FridayParts, not a Kubota parts book; confirm with a Kubota dealer | HH660-36060 |
Step-by-step
- Clean around the filter, unscrew it and fit the new one.
- Check the transmission oil level and for leaks.
Tools: Drain tray, Filter wrench
Transmission fluid and hydraulic filter
Transmission · every 400 hours
Fluid change and hydraulic oil filter replacement are both at 400 hours.
| Part | Qty | Notes | Part number |
|---|---|---|---|
| Transmission fluid | 1 | Kubota UDT fluid. Quantity: check your handbook | check your handbook |
| Hydraulic oil filter | 1 | OEM-format number listed by FridayParts, not a Kubota parts book; confirm with a Kubota dealer | HH670-37710 |
Step-by-step
- Warm the tractor and stop it.
- Drain the transmission case.
- Replace the hydraulic filter and refill with UDT fluid.
- Run and bleed the hydraulics then recheck the level.
Tools: Drain tray (20 L)
Front axle case oil
Driveline · every 400 hours
Change every 400 hours; the front axle pivot is adjusted at the same time.
| Part | Qty | Notes | Part number |
|---|---|---|---|
| Front axle oil | 1 | Kubota UDT fluid. Quantity: check your handbook | check your handbook |
Step-by-step
- Drain from the plug, refill and check the level plug.
Tools: Drain tray
Fuel filter
Fuel · every 400 hours
The fuel filter element is cleaned every 100 hours and replaced every 400 hours.
| Part | Qty | Notes | Part number |
|---|---|---|---|
| Fuel filter | 1 | OEM-format number listed by FridayParts, not a Kubota parts book; confirm with a Kubota dealer | 6A320-59930 |
Step-by-step
- Close the shutoff, remove the cup and clean it.
- Replace the element at 400 hours.
- Bleed the fuel system.
Tools: Drain tray
Valve clearance
Engine · every 800 hours
Adjust every 800 hours.
Step-by-step
- Check your handbook for the clearance and procedure, or use a dealer.
Tools: Feeler gauges
Coolant change and system flush
Engine · every 2 years
Every 2 years.
| Part | Qty | Notes | Part number |
|---|---|---|---|
| Coolant | 1 | Check your handbook | check your handbook |
Step-by-step
- Drain, flush and refill.
Tools: Drain tray
Oils, fluids and capacities
| System | Oil or spec | Capacity |
|---|---|---|
| Engine | Kubota diesel (B2650); turbo diesel (B3350 and B3350SU) | |
| Engine oil | 10W-30 or 15W-40 (SAE30 above 25 C) | 4.0 L with filter (B2650), 4.8 L with filter (B3350 / B3350SU) |
| Coolant | Change every 2 years. Capacity: check your handbook | |
| Valve clearances | Adjust every 800 hours. Figure: check your handbook | |
| Engine oil | 10W-30 or 15W-40. Above 25 C SAE30 | 4.0 L (B2650) / 4.8 L (B3350) with filter |
| Transmission and hydraulic (HST) | Kubota UDT fluid | Check your handbook |
| Front axle case | Kubota UDT fluid | Check your handbook |
| Grease | EP2 grease. Multipurpose NLGI-2 or NLGI-1 (GC-LB) | Until grease overflows |
| Fuel | No.2-D S15 diesel; No.1-D S15 below -10 C | - |
Specifications
| Gearbox | Hydrostatic main with 3 ranges |
Known problems
US handbook
The only readable copy is the U.S.A. edition. Intervals match the UK tractor, but transmission and coolant capacities were not readable.
Repair guides
- Fuel filter bowl, bleeding, fan belt and clutch housing water (Kubota B2650 / B3350) (Easy, 45 minutes): Hard starting or stalling after the filter was cleaned or the tank ran dry, squealing or slack belt, or water in the clutch housing after washing or wet weather.
- Brake pedal free travel, toe-in and wheel bolt torque (Kubota B2650 / B3350) (Moderate, 1 hour): Long or uneven brake pedal travel, front tyre wear, or loose wheel bolts.
The full step-by-step guides are in Farmyard Workshop once you add your tractor.
Parts list with genuine part numbers
Kubota B2650 / B3350 (hydrostatic) - maker filter/service sheets and parts lists already cited on the site entry; serial splits are in the row notes
Engine service
| Part | Part number | Qty | Notes |
|---|---|---|---|
| Engine oil filter | HH150-32094 | 1 | B2650 number. OEM-format number listed by FridayParts, not a Kubota parts book; confirm with a Kubota dealer. B3350 may differ |
| Air filter element (primary) | 6C060-99410 | 1 | OEM-format number listed by FridayParts, not a Kubota parts book; confirm with a Kubota dealer |
| Secondary element | 32721-58242 | 1 | OEM-format number listed by FridayParts, not a Kubota parts book; confirm with a Kubota dealer |
Fuel
| Part | Part number | Qty | Notes |
|---|---|---|---|
| Fuel filter | 6A320-59930 | 1 | OEM-format number listed by FridayParts, not a Kubota parts book; confirm with a Kubota dealer |
Transmission and hydraulics
| Part | Part number | Qty | Notes |
|---|---|---|---|
| HST filter | HH660-36060 | 1 | OEM-format number listed by FridayParts, not a Kubota parts book; confirm with a Kubota dealer |
| Hydraulic oil filter | HH670-37710 | 1 | OEM-format number listed by FridayParts, not a Kubota parts book; confirm with a Kubota dealer |
Sources
- Kubota B2650 / B3350 / B3350SU operator's manual, English (U.S.A.) code 6C410-6311-1: service interval chart and procedures. Scribd 715061088, page-file method. These are the same tractors sold in the UK.
- OEM-format filter numbers (6C060-99410, 6A320-59930, HH670-37710) listed by FridayParts for B2301 to B2650
- OEM-format filter numbers HH150-32094, 32721-58242 and HH660-36060 listed by FridayParts
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