Need the factory rebuild data for your Kubota M5091 or M5111 tractor? This 996-page Kubota M5091, M5111 Workshop Manual PDF (OEM #9Y111-20842) covers both ROPS and Cabin configurations, full engine-out procedures for the Common Rail V3800-TIEF4, transmission teardown for F18/R18 and F36/R36 speed models, and every system from rear axle to cabin A/C. You get hydraulic schematics mapping total circuit flow for both transmission models, wiring diagrams across main, body, and cabin harnesses, 10 pages of torque tables, and 13 pages of DTC error codes paired with troubleshooting across every major assembly. Fill the transmission case to 60 L and top the engine crankcase with 10.7 L before startup. That tractor isn't making money in the shop. Bookmarked by section; search any spec by keyword or pull it up on your tablet right at the machine.
What's Inside This Kubota M5091, M5111 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 31-46 | Safety First, Preparing for Emergencies, Working Cautions, Starting Machine Safely, Preventing Fires, Preventing Acid Burns, Avoiding High Pressure Fluid, Avoiding Hot Exhaust |
| General | 47-150 | Tightening Bolts and Nuts, Applying Thread-Locking Fluid, Installing Circlips, Installing Spring Pins, Handling Split Pin, Handling Chain Joint and Split Pin |
| Maintenance | 151-200 | Service Intervals, Maintenance Items Chart, Lubricants, Fuel and Coolant, Check and Maintenance, Daily Check, Every 100 Hours |
| Engine | 201-328 | Feature of Cylinder Block, Feature of Cylinder Head, Feature of Piston |
| Transmission | 329-464 | Mechanism, Structure (Transmission) |
| Rear Axle | 465-488 | Mechanism (Features of Rear Axle), Servicing, Troubleshooting for Rear Axle, Service Specifications for Rear Axle, Tightening Torques for Rear Axle |
| Brakes | 489-526 | Mechanism, Traveling Brake (Structure of Traveling Brake, Function of Master Cylinder Assembly), Parking Brake (Structure of Gear Locked Parking Brake) |
| Front Axle | 527-559 | Mechanism, Structure (4 Wheel Drive, Function of Limited Slip Differential), Servicing, Troubleshooting for Front Axle, Service Specifications for Front Axle |
| Steering | 560-601 | Mechanism, Mechanism of Steering, Feature of Steering Cylinder, Servicing, Troubleshooting for Steering, Service Specifications for Steering, Tightening Torques for Steering |
| Hydraulic System | 602-673 | Mechanism (Structure of F18/R18 Speed Transmission Model Hydraulic System, Hydraulic System Structure, Outline of Hydraulic System, Hydraulic Circuit, Total Hydraulic Circuit, Hydraulic Circuit of F18/R18 Speed Transmission Model, Hydraulic Circuit of Whole Hydraulic System, 3-Point Hitch Hydraulic System, Outline of 3-Point Hitch Hydraulic Circuit Diagram, Auxiliary Control Valve, Structure of S/D Valve, Structure of Floating Detent Valve, Structure of Self Canceling Detent Valve, Structure of Flow Control Valve, Structure of Hydraulic Block, Linkage Mechanism, Function of Position Control, Outline of Draft Control, Function of Mixed Control, Feature of Hydraulic Cylinder) |
| Electrical System | 674-884 | Location of Electrical Components (Electrical Component Location on Main Harness 1, Electrical Component Location on Main Harness 2, Electrical Component Location on Body Harness, Electrical Component Location on Cabin Harness) |
| Cabin | 885-972 | Air Conditioning System (Structure of Air Conditioning System, Structure of Compressor, Operation of Compressor, Property of Compressor Oil, Feature of Air Conditioner Unit, Feature of A/C Blower, System Control of Air Conditioner, Air Flow, Air Flows in Cabin, Function of Air Control Vent, Electrical System, Electrical Circuit of Air Conditioner, Outline of Blower Relay and Compressor Relay, Blower Relay, Outline of Air Volume Adjustment by Blower Relay and Blower Switch, Blower Relay and Blower Switch) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Fuel tank capacity | 105 L | p. 156 |
| Coolant capacity | 10 L (Recovery tank: 1.0 L) | p. 156 |
| Engine Oil Capacity | 10.7 L | p. 69 |
| Transmission Case Oil Capacity | 60 L | p. 156 |
| Engine Rated Revolution (ROPS model) | 2400 rpm | p. 68 |
| Engine Rated Revolution (Cabin model) | 2600 rpm | p. 70 |
| Tire Inflation Pressure (Front) | 160 kPa | p. 78 |
| Engine Compression Pressure (Service Specification) | 3.09 to 3.28 MPa / 200 min⁻¹ (rpm) | p. 232 |
| Valve Clearance (Cool) | 0.23 to 0.27 mm | p. 232 |
| Main Bearing Case Screw Torque | 138 to 147 N·m | p. 238 |
| Rear Wheel Mounting Nut Torque | 343 to 401 N·m | p. 359 |
Kubota M5091, M5111 Common Problems This Manual Covers
Kubota M5091 engine turns over slowly and emits thick white exhaust smoke during cold weather starts
Inspect the fuel delivery system and test engine compression. Drain and replace the engine oil, ensuring you fill it to the exact 10.7 L capacity noted on page 69. Clean the air filter elements and verify the glow plugs are functioning properly before attempting another start.
Manual Section: Engine TroubleshootingRear wheels make excessive grinding noise when turning under load or backing up
Drain the transmission fluid and inspect the differential gears for metal shavings. Refill the system with exactly 60 L of transmission fluid as specified on page 156. Check the rear wheel mounting nuts and torque them to 343 to 401 N·m according to page 359.
Manual Section: Transmission TroubleshootingImplement drops by weight when auxiliary control valve is in the neutral position
Test the cylinder for internal leaks and inspect the auxiliary control valve spools. Tighten the 1/8 thread hose fittings to 13.8 to 15.6 N·m as directed on page 61. Replace any damaged O-rings and verify the hydraulic pump pressure meets factory specifications.
Manual Section: Hydraulic System TroubleshootingElectronic control unit throws active diagnostic trouble codes and engine oil pressure lamp stays illuminated
Read the active fault codes using your diagnostic tool and compare them against the error code reference. Verify the sensor wiring harness is intact. Check the engine crankcase level and ensure it holds the full 10.7 L capacity before testing the pressure sender.
Manual Section: Electrical System Diagnostic Trouble Codes (DTC)Front wheels wander at higher speeds and steering wheel turns spontaneously on flat ground
Measure the front wheel alignment and inspect the steering cylinder tie rods for excessive play. Verify the front tire inflation pressure is exactly 160 kPa as shown on page 78. Bleed trapped air from the hydraulic steering circuit and test the steering valve operation.
Manual Section: Steering TroubleshootingFrequently Asked Questions
What are the recommended service intervals?
The manual provides a service intervals chart. For example, engine oil should be changed initially at 50 hours and then every 500 hours. The air cleaner primary element should be cleaned every 100 hours, and replaced every 1000 hours or 1 year, whichever comes first. The coolant should be changed every 2000 hours or 2 years.
What fluids and capacities does this machine require?
The machine requires No.2-D S15 diesel fuel with a capacity of 105 L. For the engine crankcase (with filter), it requires 10.7 L of CJ-4 DPF type engine oil. The transmission case requires 60 L of KUBOTA UDT or SUPER UDT fluid, and the front differential case oil (4WD) requires 6.0 L of the same fluid.
How to troubleshoot engine won't start?
If the engine does not start, common causes include no fuel (fill up the fuel, page 3-5), air in the fuel system (bleed the air), or a damaged fuel pump (replace). Other issues could be a clogged fuel filter (replace, page 3-22) or incorrect valve timing (check the timing gear, page 4-97).
What are the hydraulic system specifications?
The hydraulic system specifications include a relief valve operating pressure of above 15.0 MPa (153 kgf/cm², 2180 psi) at engine idling speed, and below 18.6 MPa (190 kgf/cm², 2700 psi) at engine maximum speed. The position control lever has a floating range of 10 to 30 mm (0.40 to 1.1 in.). The cylinder has a free play of 5 to 8 mm (0.2 to 0.3 in.).
What do I get after purchasing this Kubota M5091, M5111 manual?
You get a 996-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, bring it right to the shop floor.
Am I able to print pages from this Kubota M5091, M5111 manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
Can I find wiring schematics in this Kubota M5091, M5111 manual?
Complete wiring diagrams are included, covering all electrical circuits, harness routing, and connector pinouts for the Kubota M5091, M5111.
Document Quality
This is a native digital PDF document, allowing you to search and copy the full text with ease. The text quality is consistently crisp and very easy to read on every page. Diagrams and illustrations are clear raster images with all labels perfectly legible, ensuring good visual clarity for technical details. The pages are clean, free from any scan artifacts, stains, or skewed content, though there is one blank filler page at the beginning of the safety section.
Reviews
There are no reviews yet.