Kubota built the B3300SU-AUS one way, and this OEM manual (#9Y111-05191) documents it that way: system by system, from engine internals out to the OPC safety circuit. The hydraulic schematics trace full circuit routing for the HST, 3-point hitch, front loader control valve, and power steering pump. Wiring diagrams map the complete OPC system circuit, controller logic, and safety switch conditions. Troubleshooting charts sort faults across engine, clutch, transmission, brakes, front axle, steering, hydraulics, and electrical. Torque tables list every fastener value: cylinder head screws at 64 to 68 N·m, for instance, with the transmission taking exactly 14.5 liters of Kubota UDT or Super UDT. Every idle hour costs money, so pull the spec on the first try. Bookmarked by system and keyword-searchable, it opens on your phone right at the machine.
What's Inside This Kubota B3300SU-AUS Manual
| System | Pages | Key Topics |
|---|---|---|
| Information | 3-13 | Safety First, Safety Decals, Specifications, Traveling Speeds, Dimensions |
| General | 14-70 | Tractor Identification (Model Name And Serial Number, Cylinder Number) |
| Engine | 71-121 | Disassembling And Adjusting (Engine Body, Lubricating System, Cooling System, Fuel System), Preparation (Separating Engine From Clutch Housing), Servicing Specifications, Checking |
| Clutch | 122-138 | Linkage Mechanism, Operation, Preparation (Separating Engine From Clutch Housing), Disassembling And Servicing (Checking And Adjusting), Servicing Specifications, Checking |
| Transmission | 139-194 | Power Train For Travelling System (Hydrostatic Transmission), Power Train For Pto Gear (Rear Pto Section), Structure |
| Rear Axle | 195-205 | Structure, Disassembling And Servicing (Disassembling And Assembling) |
| Brakes | 206-221 | Linkage, Operation, Disassembling And Servicing (Checking And Adjusting), Servicing Specifications, Checking, Disassembling And Assembling (Brake Pedal) |
| Front Axle | 222-237 | Disassembling And Adjusting, Structure, Servicing Specifications, Checking, Disassembling And Assembling (Separating Front Axle) |
| Steering | 238-257 | Structure (Steering Linkage, Power Steering, Hydraulic Circuit For Power Steering System), Preparation (Hydraulic Pump For Power Steering, Separating Power Steering Assembly) |
| Hydraulic System | 258-290 | Hydraulic Circuit, Hydraulic Pump, Control Valve Assembly (Front Loader Control Valve), 3-Point Hitch Control Valve (Shim), Relief Valve |
| Electrical System | 291-337 | Wiring Diagram, Engine Starting System And Stopping System (Opc System Circuit, Controller, Safety Switch And Engine Condition) |
Every system also includes servicing, tightening torques, and troubleshooting.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Front wheel mounting nut torque | 79 to 92 N·m (8.1 to 9.4 kgf·m, 59 to 67 lbf·ft) | p. 228 |
| Rear wheel mounting nut torque | 146 to 150 N·m (14.8 to 15.3 kgf·m, 107 to 110 lbf·ft) | p. 200 |
| Cylinder head screw torque | 64 to 68 N·m (6.5 to 6.9 kgf·m, 47 to 50 lbf·ft) | p. 98 |
| Transmission fluid type | KUBOTA UDT or SUPER UDT fluid | p. 23 |
| Transmission fluid capacity | 14.5 L (3.83 U.S. gals, 3.19 Imp.gals) | p. 23 |
| Engine oil filter replacement interval | Replace at 50 hours | p. 27 |
| Transmission oil filter replacement interval | Replace at 200 hours | p. 27 |
| Fuel filter element replacement interval | Replace at 200 hours | p. 27 |
| Air cleaner element (primary) cleaning interval | Clean at 50 hours | p. 27 |
| Air cleaner element (secondary) replacement interval | Replace at 200 hours | p. 27 |
| Battery type | 55B24L(S)-MF | p. 36 |
| Battery voltage | 12 V | p. 36 |
Kubota B3300SU-AUS Common Problems This Manual Covers
Kubota B3300SU-AUS HST transmission emits high-pitched whine, sluggish response under load p. 23
Check transmission fluid level and type first. Drain and refill with Kubota UDT or Super UDT fluid; total capacity is 14.5 L (page 23). Incorrect or degraded fluid is the leading cause of HST whine on this model. If noise continues after the fluid change, verify the high-pressure relief valve against the 32.1 to 33.2 MPa spec on page 157.
Manual Section: Transmission (Hydrostatic) TroubleshootingEngine cranks slowly or won't fire in cold weather, glow plug light stays on p. 291
Test the battery before anything else. The spec is 12 V, 36 Ah (type 55B24L(S)-MF, page 36) with 433 A cold cranking amps; anything below spec kills cold starts. Work through the Electrical System Troubleshooting section at page 291 for starter circuit and pre-heat lamp faults. Also replace the fuel filter if it's past the 200-hour interval on page 27.
Manual Section: Electrical System TroubleshootingThree-point hitch fails to raise implements fully or drifts down under load p. 279
Inspect hydraulic fluid level and condition. The 3-point hitch pump should deliver 25.3 L/min at no pressure (page 276); weak lift points to a flow or pressure fault. Test the relief valve against the 14.4 to 15.2 MPa spec on page 279. The Hydraulic System Troubleshooting section covers implement not rising, low lift, and implement drop by weight.
Manual Section: Hydraulic System TroubleshootingEngine runs rough at idle, smokes heavily, or lacks power climbing hills p. 73
Verify valve clearance when cold; the spec is 0.145 to 0.185 mm on page 76, and a gap outside this range causes rough idle and smoke. Check the engine troubleshooting chart on page 73 to trace exhaust and low-power conditions. Clean the air cleaner primary element every 50 hours and replace the secondary at 200 hours per page 27.
Manual Section: Engine TroubleshootingClutch pedal feels stiff, transmission drags, or clutch chatters during engagement p. 128
Measure clutch pedal free travel; the spec is 20 to 30 mm on page 128. Adjust the linkage rod if out of range before assuming internal wear. The Clutch Troubleshooting section covers dragging, slipping, and chattering by symptom. If problems persist after adjustment, separate the engine from the clutch housing at page 130 and inspect the disc for wear.
Manual Section: Clutch TroubleshootingBrakes pull to one side or require excessive pedal force to stop p. 212
Compare both brake pedals for free travel; each should measure 30 to 40 mm per page 212. Uneven adjustment between left and right is the most common cause of pulling. The Brakes Troubleshooting section covers uneven braking, drag, and poor force. If adjustment brings no improvement, inspect discs and linings using the disassembly procedures starting at page 206.
Manual Section: Brakes TroubleshootingFrequently Asked Questions
Where can I find the Kubota B3300SU-AUS torque specs?
Torque values live in each section's own "Tightening Torques" table. Find them in General (page 25), Engine (page 81), Clutch (page 129), Transmission (page 159), Rear Axle (page 200), Brakes (page 213), Steering (page 245), and Hydraulic System (page 277).
How do I troubleshoot Kubota B3300SU-AUS hydraulic issues?
Head to the "Troubleshooting" table in the Hydraulic System chapter, page 275. It lists symptoms like "Implement Does Not Rise (No Noise)" and "Implement Drops by Its Weight" next to their probable causes and recommended fixes.
Kubota B3300SU-AUS torque specs for wheel lug nuts
Wheel torque values sit in the "Checking Wheel Mounting Nuts Tightening Torque" section on page 35. Front wheel mounting nuts: 78 to 90 N·m (8.0 to 9.2 kgf·m, 58 to 66 lbf·ft). Rear wheel mounting nuts: 167 to 191 N·m (17.0 to 19.5 kgf·m, 123 to 141 lbf·ft). Rear wheel mounting bolts: 200 to 220 N·m (20.4 to 22.4 kgf·m, 148 to 162 lbf·ft).
What are the replacement specifications for hydraulic fluid / Super UDT2?
The transmission case holds 14.5 L (3.83 U.S. gals, 3.19 Imp.gals) of KUBOTA UDT or SUPER UDT fluid; the front axle case takes 4.5 L (4.8 U.S.qts, 4.0 Imp.qts) of the same. Stick to multi-grade transmission oil only, or you risk damaging the transmission and hydraulic system.
How quickly can I access this Kubota B3300SU-AUS manual after buying?
Checkout triggers an instant download of the full 337-page searchable PDF. Open it on a laptop, tablet, or phone and take it straight to the shop floor.
Is this Kubota B3300SU-AUS Workshop Manual printable?
None at all. The PDF is DRM-free, so print whatever sections you need for the shop. Standard letter or A4 paper both work.
Are there wiring harness diagrams in this Kubota B3300SU-AUS manual?
Yes. It includes complete electrical wiring diagrams, wire routing, and connector pinouts.
Document Quality
This document is a native digital PDF, allowing you to search and copy the full text. All text is crisp and easy to read throughout the manual. Diagrams and illustrations are primarily vector graphics, appearing sharp and clear at any zoom level, with all labels perfectly readable. The pages are clean with no scan artifacts, stains, or skewed content. There are no notable blank or filler pages.
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