Segment:
Sub-compact tractor, utility tractor.
Target Audience:
Homeowners, landscapers, small farm operators, property maintenance.
Competitors:
John Deere 1-series, Yanmar SA series, Massey Ferguson GC series, Mahindra Max series.
Versatility:
Designed for a wide range of tasks with various available attachments (mower deck, loader, backhoe, tiller, snow blower).
Value Proposition:
Enables owners and technicians to perform all necessary maintenance and repairs, saving on labor costs and extending the tractor's lifespan.
Engine Mechanical:
Complete engine overhaul, cylinder head, block, pistons, crankshaft, camshaft, valve train, timing components, cooling system, lubrication system.
Engine Fuel System:
Fuel injection system, injection pump, injectors, fuel lines, filters, troubleshooting.
Transmission Gear:
Clutch, main transmission, PTO gearbox, synchronizers, gears, bearings, shifting mechanisms, overhaul procedures.
Transmission Hst:
Variable displacement hydraulic pump and motor, control valve, oil reservoir, filtration, troubleshooting and repair of hydrostatic drive components.
Drivetrain:
Front axle, rear axle, differential, driveshafts, PTO shaft, U-joints, gear reduction units.
Hydraulics:
Hydraulic pump (main and power steering), hydraulic control valve, cylinders (lift, steering), reservoir, filters, hoses, troubleshooting, system testing.
Electrical System:
Starter motor, alternator, battery, wiring diagrams, lighting, safety switches, PTO engagement switch, instrument panel, troubleshooting of electrical faults.
Steering:
Power steering system components, steering cylinder, hydraulic lines, troubleshooting.
Braking System:
Brake assembly, brake pedals, master cylinder, brake fluid, bleeding procedures, hydraulic lines.
Chassis And Body:
Frame, front grille, fenders, operator station, seat, mounting points for attachments.
Maintenance Procedures:
Scheduled maintenance, oil changes, filter replacements, lubrication, belt tensioning, greasing points.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon issues across all major components.
Repair Procedures:
Step-by-step instructions for disassembling, repairing, and reassembling all major tractor components.
Overhaul Procedures:
Detailed guidance for complete engine, transmission, and hydraulic system overhauls.
Adjustment Procedures:
Clutch adjustment, brake adjustment, PTO engagement adjustment, hydraulic valve adjustments.
Torque Specifications:
Precise torque values for all critical fasteners.
Depth:
Comprehensive, from basic maintenance to complete component overhaul and advanced diagnostics.
Engine Model:
Kubota D750 (typical for this series, confirm specific model within manual)
Engine Type:
3-cylinder, vertical, water-cooled, 4-cycle diesel engine
Displacement:
Approx. 0.75 liters (749 cc)
Bore X Stroke:
68.0 mm x 68.0 mm (typical, confirm with manual)
Rated Power:
Approx. 15 HP (gross engine horsepower, PTO horsepower will be lower, e.g., 13-14 HP, confirm with manual).
Governed Rpm:
Approx. 2600 RPM (confirm with manual).
Injection System:
Direct injection, rotary injection pump (e.g., Bosch VE series typical)
Transmission Type B1550:
Constant mesh, 6-speed forward, 2-speed reverse (confirm specific gear ratios with manual).
Transmission Type B1550Hst:
Hydrostatic Transmission (HST) with two speed ranges (e.g., LO/HI).
Pto:
Independent PTO (IPTO) for rear PTO (typically 540 RPM at engine rated speed), potentially mid PTO option depending on configuration.
Clutch:
Dry type single plate clutch (for B1550 Gear).
Differential Lock:
Rear differential lock, mechanically actuated.
Overall Length:
Approx. 2400-2600 mm (without 3PH, varies with configuration, confirm with manual).
Overall Width:
Approx. 1100-1300 mm (depends on tire size, confirm with manual).
Wheelbase:
Approx. 1500-1600 mm (confirm with manual).
Operating Weight:
Approx. 800-1000 kg (without attachments, confirm with manual).
Drawbar Horsepower:
Estimated 11-13 HP (dependent on transmission and driveline losses, consult manual for exact PTO HP).
Engine Oil Change:
Typically every 50-100 hours or annually (refer to manual for precise interval and conditions).
Fuel Filter Replacement:
Typically every 200-400 hours or as needed based on fuel quality (refer to manual).
Hydraulic Oil Change:
Typically every 400-600 hours or annually (refer to manual for specific interval and fluid type).
Engine Oil Type:
Kubota Super UDT Fluid or equivalent API CD/CE/CF-4 SAE 10W-30 or 15W-40 diesel engine oil (confirm viscosity based on climate and manual recommendation).
Hydraulic Oil Type:
Kubota Super UDT Fluid (Universal Tractor Drive Train) is often recommended for integrated hydraulic and transmission systems. Alternatively, ISO VG 46 hydraulic oil may be specified. Crucially, the manual will specify the exact type and viscosity.
Transmission Fluid Gear:
API GL-4 SAE 80W-90 gear oil for the main transmission and differential (confirm with manual).
Coolant Type:
Ethylene glycol based antifreeze, 50/50 mix with distilled water. Manual will specify recommended type and capacity.
Common Problems:
Wear on HST hydrostatic pump/motor seals, PTO engagement issues, hydraulic cylinder leaks, minor electrical connection corrosion, starter motor brushes wear (common for age).
Preventative Maintenance Focus:
Regular fluid and filter changes are critical for HST longevity. Inspecting and greasing pivot points and linkages prevents premature wear.
Heritage:
Kubota has a long-standing reputation for producing reliable and durable compact tractors since the mid-20th century, known for their robust diesel engines and practical design.
Series Positioning:
The B-Series is a foundational line for Kubota, offering a balance of power, size, and functionality for a wide range of users. The B1550 represents an evolution in this series, likely incorporating improvements in ergonomics, hydraulics, and transmission options.
Production Era:
The B1550 series was primarily produced in the late 1980s and 1990s (exact dates to be confirmed by manual or serial number lookup).
