This is the factory Kubota Workshop Manual for the B3150 and B3150SU compact tractors, a 486 page PDF covering the V1505 series diesel engine and, on cab equipped machines, the full air conditioning system.
Structured mechanism first and servicing second, it covers the engine, the hydrostatic transmission with cruise control and front wheel drive, rear and front axles, brakes, power steering, the hydraulic and three point hitch system, the electrical system with Easy Checker and digital display, and the cabin refrigeration circuit. Every section includes troubleshooting, servicing specifications, and tightening torques.
Owners and independent mechanics get the factory level detail needed to chase a weak lift, an HST drive loss, a hard start, or a cab that will not cool, and to reassemble each assembly to the correct clearances and torque values.
What's Inside This Kubota B3150, B3150SU Manual
| System | Pages | Key Topics |
|---|---|---|
| Information | 4-16 | Safety First, Safety Decals, Specifications, Traveling Speeds, Dimensions, Troubleshooting, Tightening Torques, Disassembling and Servicing (Disassembling and Assembling) |
| General | 17-83 | Tractor Identification (Model Name and Serial Number, Cylinder Number) |
| Engine | 84-90 | Lubricating System, Cooling System, Fuel System (General), Governor |
| Engine Servicing | 91-152 | Troubleshooting, Servicing Specifications, Tightening Torques, Checking, Disassembling and Servicing (Checking and Adjusting, Preparation, Disassembling and Assembling) |
| Transmission | 153-185 | Structure, Front Case, Hydrostatic Transmission, Cruise Control, Range Gear Shift Section, Front Wheel Drive Section, PTO System, Differential Gear System |
| Transmission Servicing | 186-246 | Troubleshooting, Servicing Specifications, Tightening Torques, Checking, Disassembling and Servicing |
| Rear Axle | 247-249 | Structure, Rear Axle Type, Differential Gear Function |
| Rear Axle Servicing | 250-256 | Rear Axle Case, Rear Axle Shaft, Differential Lock Shift Fork, Differential Lock Clutch, Brake Shaft Assembly, Ball Bearing |
| Brakes | 257-261 | Linkage (ROPS, Cabin), Operation (During Braking) |
| Brakes Servicing | 262-272 | Brake Pedal, Rear Axle Case, Differential Lock Shift Fork, Brake Assembly, Brake Discs, Friction Plate, Cam Plate |
| Front Axle | 273-275 | Structure (Wheel Drive Model), Front Axle Construction, Power Transmission, Differential System Function |
| Front Axle Servicing | 276-292 | Front Axle, Steering Cylinder, Bevel Gear Case, Differential Gear, Spiral Bevel Pinion Shaft, Front Gear Case, Axle Flange |
| Steering | 293-298 | Hydraulic Circuit, Steering Controller, Steering Cylinder, Hydraulic Pump |
| Steering Servicing | 299-311 | Relief Valve, Hydraulic Pump, Power Steering Controller, Power Steering Cylinder, Tie-Rod, Steering Wheel |
| Hydraulic System | 312-330 | Hydraulic Circuit, Hydraulic Pump, Three Points Hydraulic System |
| Hydraulic System Servicing | 331-357 | Hydraulic Pump, Relief Valve, Lift Arm, Hydraulic Cylinder, Control Valve, Front Loader Control Valve |
| Electrical System | 358-376 | Electrical Circuit, Engine Starting System and Stopping, Lighting System, Easy Checker, Digital Display |
| Electrical System Servicing | 377-423 | Battery, Fuse, Meter Panel, Starting System, Charging System, Lighting System, Warning Lamp, Relay |
| Cabin | 424-437 | Air Conditioner System, Refrigeration System, System Control, Electrical System |
| Cabin Servicing | 438-486 | Compressor, Air Conditioner Unit, Blower Motor, Wiper Motor, Pressure Switch, Cabin Windshields, Heater Hoses |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Front wheel mounting nut torque | 77 to 90 N-m (57 to 67 lbf-ft) | p. 279 |
| Rear wheel mounting nut torque | 167 to 191 N-m (123 to 141 lbf-ft) | p. 43 |
| Cylinder head cover screw torque | 7 to 8 N-m | p. 103 |
| Cylinder head screws torque | 64 to 68 N-m (47 to 50 lbf-ft) | p. 103 |
| Hydraulic oil filter replacement interval | Replace every 400 Hr | p. 32 |
| Transmission oil filter cartridge replacement interval | Replace every 400 Hr | p. 32 |
| Fuel filter element replacement interval | every 400 Hr | p. 32 |
| Air cleaner element (Double element type) Primary element replacement interval | Replace every 1 year | p. 32 |
| Air cleaner element (Double element type) Secondary element replacement interval | Replace every 1 year | p. 32 |
| Engine oil filter replacement interval | Replace every 200 Hr | p. 32 |
| Hydraulic Hose Fittings (Hose size 02) torque | 13.8 to 15.6 N-m (10.2 to 11.5 lbf-ft) | p. 30 |
| Pipe size (φ4 x t1.0) torque | 19.7 to 29.4 N-m (14.5 to 21.6 lbf-ft) | p. 30 |
