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Kubota

Kubota B21 Tractor Illustrated Master Parts List Manual

Kubota B21 Tractor Illustrated Master Parts List Manual

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Machine data plateRef 24148
Brand
Kubota
Equipment
Lawnmowers
Models covered
Other Wheel Horse Manuals, Wheel Horse
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

What happens after you pay

  • Download link opens on the order page immediately
  • The same link is emailed to you — re-download any time
  • Open on phone, tablet or PC; print only the pages you need
  • Not sure it covers your serial range? Ask us before you buy
🏷️ Basic Information
Identification
Make:
Kubota
Model:
B21
Model Variant:
Tractor (compact utility)
Production Years:
1993-2005 (approx.)
👋 Introduction
Market Position
Target Audience:
Landowners, small farmers, contractors, and equipment technicians needing a reliable compact tractor for loader and backhoe work.
Competitive Advantage
Key Advantage:
The B21 is a dedicated TLB (tractor-loader-backhoe) model, distinguishing it from standard compact tractors by offering an integrated, heavy-duty backhoe and a robust front loader, with high ground clearance and a rigid frame.
Key Features
Engine:
Kubota 4-cylinder diesel, 4WD standard.
Hydraulics:
Open center with multiple control valves for loader, backhoe, and 3-point hitch.
Transmission:
GST (Glide Shift Transmission) provides clutchless shifting between ranges.
PTO:
Independent rear PTO (540 rpm).
3-Point Hitch:
Category I with position control and telescopic lower links.
📋 Manual Details
Manual Information
Coverage Areas:
Complete parts breakdown for all major assemblies: engine, clutch, transmission, front axle, rear axle, brakes, steering, hydraulic system, electrical system, loader, backhoe, and optional equipment.
Page Count:
Approximately 500 pages (illustrated parts manual).
Manual Type:
Illustrated Master Parts List Manual.
Language:
English
File Format:
PDF
Delivery Method:
Instant download
📖 Manual Coverage
Systems Covered
Engine and related parts:
Complete engine components: block, head, pistons, crankshaft, oil pump, fuel injection pump, injectors, filters, and more.
Clutch:
Clutch disc, pressure plate, release bearing, and linkage.
Transmission:
Gear components, shift forks, shafts, synchronizers (if applicable), bearings, seals, and the GST assembly.
Front axle and steering:
Front differential, final drives, axle shafts, kingpins, steering gear, tie rods, and front wheel components.
Rear axle and final drives:
Rear differential, ring gear and pinion, axle housings, sun gears, planet gears, and wheel flanges.
Brakes:
Disc brakes, master cylinder, brake lines, and parking brake components.
Hydraulic system:
Hydraulic pump, control valves for 3-point hitch, steering, loader, and backhoe; cylinders, hoses, seals, and filters.
3-point hitch:
Lift arms, lower links, top link, and associated pins and hardware.
PTO system:
Independent PTO clutch, shaft, and drive gears.
Electrical system:
Starter, alternator, regulator, wiring harness, switches, lights, and battery.
Loader and backhoe:
Full parts breakout for the Kubota B21 loader and backhoe, including boom arms, cylinders, valve bodies, bucket, and pins.
Body and chassis:
Frame, sheet metal, fenders, grille, ROPS canopy assembly, and seat.
Cooling system:
Radiator, cooling fan, thermostat, hoses, and water pump.
Fuel system:
Fuel tank, lines, filters, and injection components.
Exhaust system:
Exhaust manifold, muffler, and piping.
Procedures Included
Parts identification:
Every part has a reference number and description for easy ordering.
Illustrations:
Detailed exploded-view drawings to aid in disassembly and assembly.
Technical depth:
Intended for technicians and owners who require accurate component-level identification; does not include service procedures.
Parts Information
OEM part numbers:
Original Kubota part numbers are listed for each component.
Quantity per assembly:
Includes required number of parts per assembly unit.
📊 Manual Specifications
Digital Format
File Format:
PDF
Compatibility:
Windows, macOS, Linux, iOS, Android – any PDF reader.
Requirements:
A web browser for download and a PDF reader for viewing.
Searchability:
Bookmarked sections and searchable text for fast lookups.
Print Quality (if printed)
Print Quality:
High-resolution 300 DPI for clear part illustrations.
Binding Type:
Digital (not physically bound)
Paper Type:
N/A – digital file only; if printed, use standard paper.
⚙️ Engine Specifications
Primary Engine
Engine Model:
Kubota D1403-B
Type:
4-cylinder, liquid-cooled, indirect injection diesel.
Displacement:
1.4 L (85.5 cu in).
Gross Power:
21.0 horsepower (15.7 kW) at 3000 rpm (SAE).
PTO Power:
17.4 horsepower (13.0 kW) at rated rpm.
Fuel System:
Indirect injection with glow plug starting.
Fuel Type:
Diesel.
🔧 Transmission
Standard Configuration
Standard Transmission:
Kubota GST (Glide Shift Transmission) with 8 forward and 4 reverse gears.
Features
Clutchless shifting:
Shifting between speeds within ranges without using the clutch pedal.
Four-wheel drive:
Integral 4WD with front axle drive.
Differential lock:
Rear differential lock for improved traction.
📐 Dimensions
Measurements
Wheelbase:
1,530 mm (60.2 in)
Overall Length (with loader and backhoe):
3,230 mm (127.2 in)
Overall Width:
1,280 mm (50.4 in)
Overall Height (ROPS):
2,180 mm (85.8 in)
Curb Weight:
1,190 kg (2,624 lb) – approximate, includes loader and backhoe.
🛡️ Safety Features
Safety Overview
Ratings / Crash Test:
N/A – off-road tractor not subject to vehicle crash tests.
Active Safety:
Four-wheel drive for better traction; independent braking; differential lock.
Passive Safety:
ROPS canopy is standard; seat belt is required for rollover protection. No airbags.
💡 Technology Features
Infotainment and Assistance
Infotainment:
N/A – tractor has no audio system.
Driver Assistance:
GST transmission and hydrostatic power steering.
🔧 Maintenance
Service Intervals
Engine oil change:
Every 50 hours or annually, whichever comes first.
Hydraulic oil change:
Every 500 hours or every 2 years.
Coolant change:
Every 2 years.
Fluid Specifications
Engine oil:
API CF or higher, SAE 15W-40 or 10W-30 depending on ambient temperature.
Transmission / hydraulic oil:
Kubota UDT fluid or equivalent such as SAE 20/30.
Coolant:
Ethylene glycol-based antifreeze with SCA (supplemental coolant additive) recommended.
Common Issues
Known wear items:
Loader and backhoe pivot pins, hydraulic cylinder seals, and glow plugs.
Notice:
Parts manual aids in identifying the correct replacement parts; refer to owner's manual for specific maintenance procedures.
📚 Vehicle History
Heritage
Brand Heritage:
Kubota Corporation, founded in 1890 in Japan; known for compact diesel engines and tractors since 1960s.
Model Evolution
Evolution:
The B21 (1993–2005) was a member of compact tractor line, designed specifically as a TLB. It was succeeded by the B26 in the mid-2000s with enhancements.
Production Location:
Manufactured in Japan by Kubota.
🏆 Awards & Recognition
Recognition
Awards:
N/A – no major awards documented for the B21 specifically; its reputation for reliability is well known.

Delivery & file format

This is a digital PDF download, not a printed book. After payment the download link appears on your order confirmation page and is emailed to the address you entered. Files open in any PDF reader on phone, tablet or computer and can be printed.

Check the serial range before you buy

Manufacturers change procedures and part numbers by serial-number break. If your data plate shows a serial prefix that is not listed above, contact us with the model and serial number and we will confirm coverage before you order.

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