All 662 pages of this Kubota L3301, L3901, L4701 Service Manual (OEM #9Y111-10123) are built around one goal: putting your Kubota tractor back in the field with factory-correct specs. You get complete hydraulic schematics covering the full implement circuit, position control valve, and steering system, plus 30 pages of wiring diagrams tracing every circuit from the ECU to sensors. Inside: 17 pages of troubleshooting charts, 10 pages of torque tables, and 100 pages of step-by-step procedures spanning the engine, HST, rear axle, clutch, and brakes. Fill the L3301/L3901 crankcase to 6.7 L (with filter) or 8.2 L on the L4701; fuel tank holds 42.0 L on the smaller models, 51.0 L on the L4701. Your machine is down. Get the factory numbers, not guesses from a forum thread. Bookmarked and keyword-searchable; open it on any device and navigate straight to the section you need.
What's Inside This Kubota L3301, L3901, L4701 Manual
| System | Pages | Key Topics |
|---|---|---|
| I Information | 4-21 | Safety First, Safety Decals, Specifications, Traveling Speeds, Dimensions |
| G General | 22-134 | Tractor Identification, Handling Precautions for Electrical Parts and Wiring, Lubricants, Fuel and Coolant, Tightening Torques, Maintenance Check List, Special Tools |
| 1 Engine | 135-241 | Engine Body, Lubricating System, Cooling System, Fuel System, EGR System, After Treatment System |
| 2 Clutch | 242-271 | TRAVELING CLUTCH, Manual Transmission Model, Hydrostatic Transmission (HST) Model, SINGLE STAGE CLUTCH, DUAL STAGE CLUTCH |
| 3 Transmission | 272-428 | Manual Transmission Model, Hydrostatic Transmission (HST) Model, POWER TRAIN FOR TRAVELING GEARS, PTO SYSTEM, Hydrostatic Transmission Assembly, LINKAGE MECHANISM |
| 4 Rear Axle | 429-441 | Rear Axle, Rear Axle Case, Differential Gear Shaft, Brake Case, Differential Pinion, Final Gear |
| 5 Brakes | 442-458 | Brake Pedal, Brake Disc, Cam Plate, Brake Cam, Brake Case, Brake Cam Lever |
| 6 Front Axle | 459-495 | Front Axle, Front Wheel Hub, Knuckle Shaft, Bevel Gear Case, Axle Flange, Steering Cylinder |
| 7 Steering | 496-530 | Linkage, Hydraulic circuit, Hydraulic pump, Steering gear box, Steering controller, Steering cylinder |
| 8 Hydraulic System | 531-576 | Hydraulic circuit, Hydraulic cylinder, Linkage mechanism, Position control valve, Hydraulic pump, Safety valve |
| 9 Electrical System | 577-662 | Electrical circuit, Instrument panel, Electric control unit (ECU), Switches, Sensors, Starting circuit |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| L3301, L3901 | ||
| Fuel tank capacity | 42.0 L (11.0 U.S.gals, 9.24 Imp.gals) | p. 34 |
| Engine crankcase (with filter) capacity | 6.7 L (7.1 U.S.qts, 5.9 Imp.qts) | p. 34 |
| Engine coolant capacity | 6.0 L (6.3 U.S.qts, 5.3 Imp.qts) | p. 34 |
| Transmission case capacity (Manual Transmission, 2WD) | 28.0 L (7.4 U.S.gals, 6.16 Imp.gals) | p. 34 |
| Transmission case capacity (Manual Transmission, 4WD) | 28.5 L (7.5 U.S.gals, 6.27 Imp.gals) | p. 34 |
| Front axle case [4WD] capacity | 4.5 L (4.8 U.S.qts, 4.0 Imp.qts) | p. 34 |
| Maintenance interval (Daily Check) | Daily | p. 39 |
| L4701 | ||
| Fuel tank capacity | 51.0 L (13.5 U.S.gals, 11.2 Imp.gals) | p. 35 |
| Engine crankcase (with filter) capacity | 8.2 L (8.7 U.S.qts, 7.2 Imp.qts) | p. 35 |
| Engine coolant capacity | 6.5 L (6.9 U.S.qts, 5.7 Imp.qts) | p. 35 |
| Front axle case [4WD] capacity | 6.5 L (6.9 U.S.qts, 5.7 Imp.qts) | p. 35 |
| Maintenance interval (Daily Check) | Daily | p. 42 |
Kubota L3301, L3901, L4701 Common Problems This Manual Covers
Kubota L3301 engine cranks but won't fire, no fuel at injectors after sitting overnight
Check the fuel shutoff valve is open and the tank is not empty. Bleed air at the injection pump bleed screw, then inspect the fuel filter for water or debris. Verify compression pressure is above 2.35 MPa (the allowable limit, page 166); if low, measure valve clearance cold at 0.18 to 0.22 mm and inspect for worn piston rings.
Manual Section: 1 EngineThree-point hitch won't lift implement, raises slowly or stops mid-stroke under load p. 531
Check the hydraulic oil filter first; a clogged filter kills lift pressure. Verify transmission fluid is at the correct level (capacities listed on page 34). Inspect the position control valve linkage for binding or improper adjustment. If fluid and filter are good, test the hydraulic pump output and relief valve per the Hydraulic System section on page 531.
Manual Section: 8 Hydraulic SystemBrake pedal drags or won't fully release after coming to a stop p. 249
Measure brake pedal free travel first; it must be 15 to 20 mm (page 249). If it's short, adjust the brake linkage. Inspect the cam plate ball holes for uneven wear and check the pedal return spring for weakness. Clean rust from the brake cam shaft; a corroded cam binds and prevents the brake from fully releasing.
Manual Section: 5 BrakesSteering wheel is stiff or hard to turn, effort increases at low speed p. 496
Check transmission fluid level and condition; the power steering shares that hydraulic circuit. Verify steering wheel free play is 20 to 50 mm on L3301/L3901 models (page 511). Inspect hydraulic pipe joints for leaks and bleed air from the system. If fluid is good and no leaks appear, test the hydraulic pump output per the Steering section on page 496.
Manual Section: 7 SteeringBattery goes dead or discharges quickly between work sessions, won't hold charge p. 577
Inspect the fan belt for slipping; a loose belt starves the alternator of drive. Check belt deflection against the 7 to 9 mm tension spec on page 170 (L3301/L3901). Load-test the battery and alternator output. If both test good, inspect the wiring harness for corroded connectors or loose grounds per the Electrical System wiring diagram.
Manual Section: 9 Electrical SystemTransmission grinds or whines during operation, gear shifts are rough and noisy p. 272
Check transmission fluid level immediately; low fluid is the leading cause of gear noise. Fluid capacities vary by model and transmission type, so verify against the spec table on page 34. If fluid is correct, suspect worn gear backlash, a damaged bearing, or a worn shift fork. Strip and inspect those components per the Transmission section on page 272.
Manual Section: 3 TransmissionFrequently Asked Questions
What are the recommended service intervals?
The manual provides a detailed maintenance check list. For instance, the engine start system should be checked every 50 hours, greasing should be done every 50 hours, and battery condition should be checked every 100 hours. Engine oil and engine oil filter should be changed/replaced every 400 hours, and the cooling system should be flushed every 2000 hours or 2 years.
What fluids and capacities does this machine require?
For the L3301/L3901 model, the fuel tank capacity is 42.0 L (11.0 U.S.gals) and requires No. 2-D S15 diesel fuel. The engine crankcase (with filter) requires 6.7 L (7.1 U.S.qts) of engine oil (refer to G-12 for type). The cooling system requires 6.0 L (6.3 U.S.qts) of fresh clean soft water with anti-freeze. The transmission case (2WD) requires 28.0 L (7.4 U.S.gals) of KUBOTA SUPER UDT-2 fluid.
How to troubleshoot engine won't start?
If the engine does not start, common probable causes include no fuel (solution: fill fuel, see page G-21), air in the fuel system (solution: bleed, see page G-46), or a clogged fuel filter (solution: replace, see page G-39). Other issues could be a discharged battery (solution: charge, see page G-33) or a stuck/clogged injector (solution: replace, see page 1-S43).
What are the hydraulic system specifications?
The hydraulic system has several specifications depending on the model. For the L3301/L3901, the hydraulic pump delivery at rated pressure is above 15.0 L/min (3.96 U.S.gals/min), with an allowable limit of 13.5 L/min. The 2WD relief valve setting pressure is 8.3 to 9.3 MPa (1200 to 1300 psi). The cylinder bore I.D. for L3301/L3901 is 75.300 to 75.500 mm, with an allowable limit of 75.600 mm.
What format is this Kubota L3301, L3901, L4701 manual in?
Immediate download of the complete 662-page searchable Service Manual. Access it on any device — laptop at your desk or phone in the field.
Can I print this Kubota L3301, L3901, L4701 manual?
Yes, print as many copies as you want — there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
Does this Kubota L3301, L3901, L4701 Service Manual have electrical diagrams?
Yes — full electrical schematics are included with wire colors, connector locations, and circuit descriptions.
Document Quality
This document is a native digital PDF, allowing you to search and copy the full text, which is consistently crisp and easy to read throughout. Diagrams and illustrations are primarily raster images, but they are clear, and all labels are readable at various zoom levels. The pages are clean with no noticeable scan artifacts, stains, marks, or skewed content. There are no notable blank or filler pages present in the document.
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