Built around the V1505-T-E4 and D1305-E4 engines, HST drivetrain, and DPF after-treatment, the B2650HSDC and B3350HSDC compact cab tractors share one service manual: OEM #9Y111-08220, 470 pages. Wiring diagrams cover both chassis. Fifteen pages of hydraulic schematics map the HST pump, three-point hitch control valve, position control, and steering circuit, while 100 pages of exploded views trace every fastener from the front axle to the cabin A/C compressor. Four troubleshooting sections work through engine no-start, HST faults, brake drag, and front axle wander, each with a cause-and-remedy table. Rear wheel bolts torque to 196-225 N·m; front wheel nuts go to 78-90 N·m. When the machine sits idle, this gets you the factory number on the first try, searchable by keyword on any device.
What's Inside This Kubota B2650HSDC, B3350HSDC Manual
| System | Pages | Key Topics |
|---|---|---|
| I Information | 3-14 | Safety First, Safety Decals, Specifications, Traveling Speeds, Dimensions |
| G General | 15-78 | Tractor Identification (Model Name And Serial Number, Cylinder Number) |
| 1 Engine | 79-158 | Engine Body (Closed Breather, Half-Floating Head Cover, Engine Control System [V1505-T-E4], Electronic Governor [V1505-T-E4], Governor [D1305-E4]) |
| 2 Transmission | 159-240 | Structure, Front Case, Hydrostatic Transmission (Structure, Pump And Motor, Oil Flow And Valves, Control Linkage), Cruise Control (Linkage), Range Gear Shift Section |
| 3 Rear Axle | 241-250 | Structure, Troubleshooting, Tightening Torques |
| 4 Brakes | 251-264 | Linkage, Operation, Troubleshooting, Servicing Specifications, Tightening Torques, Checking |
| 5 Front Axle | 265-284 | Structure (Wheel Drive Model), Troubleshooting, Servicing Specifications, Tightening Torques, Checking |
| 6 Steering | 285-300 | Hydraulic Circuit, Steering Controller, Steering Cylinder, Hydraulic Pump |
| 7 Hydraulic System | 301-336 | Hydraulic Circuit, Hydraulic Pump |
| 8 Electrical System | 337-407 | Electrical Circuit (B2650, B3350), Engine Starting System And Stopping System (Opc System Circuit, Controller, Safety Switch, Safety Switch Position And Engine Condition) |
| 9 Cabin | 408-470 | Air Conditioner System (Outline Of Air Conditioning System), Refrigeration System (Compressor, Condenser, Receiver, Air Conditioner Unit), System Control |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Rear wheel mounting nut torque | 167 to 191 N·m (17 to 19.5 kgf·m, 123 to 141 lbf·ft) | p. 38 |
| Rear wheel mounting bolt torque | 196 to 225 N·m (20 to 23 kgf·m, 145 to 166 lbf·ft) | p. 38 |
| Battery (Volt) | 12 V | p. 40 |
| Battery (Capacity at 5 H.R.) | 36 | p. 40 |
| Engine Stop Solenoid Relay (Resistance) | 0 Ω | p. 397 |
| Seat switch (Operator on the seat) | 0 Ω | p. 373 |
| Seat switch (Vacant) | Infinity | p. 373 |
| Fuel filter element (Clean interval) | every 100 hours | p. 29 |
| Fuel filter element (Replace interval) | every 400 hours | p. 29 |
| Transmission oil filters (Replace interval) | every 300 hours | p. 29 |
| Engine oil filter (Replace interval) | every 200 hours | p. 29 |
| Charge Relief Valve Setting Pressure | 0.4 to 0.6 MPa (4 to 6 kgf/cm², 60 to 80 psi) | p. 194 |
Kubota B2650HSDC, B3350HSDC Common Problems This Manual Covers
Kubota B2650HSDC and B3350HSDC won't crank or start after tractor shuts down unexpectedly
Check the OPC safety switch circuit before anything else. With the operator seated, the seat switch must read 0 Ω; vacant reads infinity. The HST pedal switch must be in neutral and the parking brake must be engaged (page 373). Also measure battery voltage; the spec calls for a 12 V battery rated at 430 cold cranking amps (page 40).
Manual Section: Electrical System Fuse/Wiring / Battery / Starting SystemEngine cranks slowly or won't fire at all in cold weather conditions
Measure battery voltage before cranking; the 12 V battery is rated at 430 CCA (page 40) and loses cranking power fast in cold conditions. If the battery tests good, check for air in the fuel system and inspect the fuel filter, due for cleaning every 100 hours (page 29). Check the no-start diagnostic chart to isolate fuel delivery from compression problems.
Manual Section: Engine Does Not Start / Engine Revolution Is Not SmoothHydrostatic transmission has no drive or loss of power in both directions
Verify the HST transmission fluid level before anything else; low fluid is the most common cause of no-drive complaints. Check charge relief valve pressure, which should measure 0.4 to 0.6 MPa (page 194). Inspect the pedal linkage for damage or binding, and measure piston slipper thickness against the allowable limit of 2.90 mm (page 194) before condemning the pump.
Manual Section: Hydrostatic Transmission System Will Not Operate / Loss of PowerThree-point hitch won't raise the implement or load drops slowly once raised
Inspect the hydraulic oil filter first; replacement is scheduled every 300 hours (page 29). Measure pump delivery at the 3-point hitch with no backpressure; minimum acceptable flow is 17.0 L/min (page 320). Check lift arm free play as well, which should measure 10 to 15 mm (page 323). If pump flow tests good, move to the control valve and relief valve.
Manual Section: Hydraulic System Implement Does Not Rise / Lower / DropsBrakes drag, pull to one side, or pedal feels hard and unresponsive
Adjust brake pedal free travel to 30 to 40 mm on both sides (page 257); uneven travel is the first thing to address on a drag or pull complaint. If that doesn't resolve it, inspect the brake cam for rust and the disc for wear. Contaminated transmission fluid causes brake disc slip, so drain and refill if fluid looks dark or burnt.
Manual Section: Brakes Uneven Braking Force / Drags / Poor BrakingFrequently Asked Questions
How do I reset the Kubota B2650HSDC/B3350HSDC DPF regeneration system?
There is no separate reset: you clear it by running a regeneration cycle. Once Particulate Matter builds up in the DPF, the indicator flashes to tell you regeneration is due. Park the tractor somewhere safe and start Parked Regeneration Mode, where the ECU burns off the accumulated PM in a slow, steady cycle.
What does error code mean on a Kubota B3350HSDC?
Three codes show on the B3350HSDC LCD when the master warning indicator blinks. ERROR-2 is a fuel sensor fault, ERROR-3 is a meter panel memory reading fault, and ERROR-21 points to a CAN communication fault.
What are the torque specs for Kubota B2650HSDC front axle or wheel bolts?
On the B2650HSDC, torque the front wheel mounting nut to 77 to 90 N·m (7.9 to 9.2 kgf·m, 57 to 67 lbf·ft). The front axle bracket mounting screw takes 200 to 230 N·m (20.4 to 23.4 kgf·m, 148 to 169 lbf·ft).
How to reset Kubota B2650HSDC DPF regen light
A blinking DPF Warning Indicator means PM warning level 3, so run Parked Regeneration as soon as you can. Move the tractor to a safe area, start Parked Regeneration Mode, and the ECU burns off the built-up PM to clear the light.
How will I receive this Kubota B2650HSDC, B3350HSDC Workshop Manual?
A 470-page searchable PDF downloads the moment you check out. Open it on a laptop, tablet, or phone and take it straight to the shop floor.
Can I print specific sections of this Kubota B2650HSDC, B3350HSDC manual?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
Are electrical wiring diagrams included in this Kubota B2650HSDC, B3350HSDC?
Yes, this Kubota B2650HSDC, B3350HSDC Workshop Manual includes complete electrical wiring diagrams, wire routing, and connector pinouts.
Document Quality
This document is a scanned PDF, but it includes an OCR layer, so you can search the full text and copy content. The text is consistently crisp and easy to read throughout the manual. Diagrams and illustrations are raster images, but they are clear, and all labels are readable. Pages are clean with no notable scan artifacts, stains, or skewed content.
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