Kubota B1220 - User Manual

Other manuals for Kubota B1220

Assembly Instructions19 pages

Questions and Answers

J
Jesse HerreraAug 15, 2025
Why is my Kubota B1220 Tractor engine overheating?
- C
  Cassandra MurphyAug 16, 2025
  Several factors can cause your Kubota Tractor's engine to overheat. Insufficient engine oil or coolant, a broken or elongated fan belt, or a radiator clogged with dust are common causes; replenish fluids, replace the belt, or clean the radiator as needed. Corrosion inside the radiator or coolant flow route can also lead to overheating, requiring cleaning or replacement. A defective radiator cap, running the engine with an overload, a defective head gasket, incorrect injection timing, or using unsuitable fuel could also be the culprit. Reduce the load, replace the cap or head gasket, adjust the injection timing, or use the specified fuel to resolve these issues.
B
Bridget ArnoldAug 19, 2025
What to do if my Kubota B1220 Tractor emits black or dark gray exhaust gas?
- C
  Christopher HernandezAug 19, 2025
  If your Kubota Tractor is emitting black or dark gray exhaust gas, it could be due to several reasons. You might be overloading the tractor, so try reducing the load. Using low-grade fuel, a clogged fuel filter, or a clogged air cleaner can also cause this issue; switch to the specified fuel and clean or replace the filters. Another potential cause is deficient nozzle injection, in which case you should repair or replace the nozzle.
M
mark47Aug 22, 2025
What to do if the starter of my Kubota Tractor does not run?
- L
  Lisa HartAug 22, 2025
  If the starter on your Kubota Tractor isn't running, the battery may be discharged, so charge it. The starter itself might be malfunctioning, requiring repair or replacement. Also, check for disconnected wiring and connect it.
D
Dr. Christina VillaAug 25, 2025
Why does my Kubota B1220 have deficient output?
- J
  Joseph ShermanAug 25, 2025
  A deficient output in your Kubota Tractor may be caused by several factors. Incorrect injection timing, seizing engine parts, a malfunctioning injection pump, or deficient nozzle injection can all contribute to this problem; adjust the timing, or repair or replace the affected components. A compression leak could also be the cause; check the compression pressure and repair if necessary.
M
Michael CookAug 28, 2025
What causes white or blue exhaust gas from my Kubota Tractor?
- A
  Amanda WallaceAug 28, 2025
  White or blue exhaust gas from your Kubota Tractor can be caused by excessive engine oil; reduce it to the specified level. Worn or stuck piston rings and cylinders, or incorrect injection timing may also be the reason; repair or replace the components, or adjust the timing.
J
Jessica SalasAug 31, 2025
Why is the oil pressure low in my Kubota Tractor?
- H
  hdickersonAug 31, 2025
  Low oil pressure in your Kubota Tractor can arise from several issues. Insufficient engine oil is a common cause; replenish it. A clogged oil strainer, a relief valve stuck with dirt, a weakened or broken relief valve spring, excessive oil clearance in crankshaft or crankpin bearings, excessive oil clearance of rocker arm, a clogged oil passage, using a different type of oil, or a defective oil pump can also be responsible. Clean or replace the affected parts, use the specified oil type, or replace the oil pump as needed.
W
wacostaSep 2, 2025
What causes excessive lubricant oil consumption in my Kubota B1220 Tractor?
- T
  Travis SandersSep 3, 2025
  Excessive lubricant oil consumption in your Kubota Tractor can be attributed to several factors. If the piston ring's gap is facing the same direction, shift the ring gap direction. Other causes include a worn or stuck oil ring, a worn piston ring groove, worn valve stem and valve guide, worn crankshaft and crank pin bearings, or oil leaking due to defective seals or packing. Depending on the cause, you may need to replace the piston, rings, valve components, bearings, or seals.
A
Alicia ConwaySep 6, 2025
Why is fuel mixed into the lubricant oil of my Kubota B1220 Tractor?
- J
  Joshua CohenSep 6, 2025
  If fuel is mixing into the lubricant oil of your Kubota Tractor, it could be due to a worn injection pump plunger, deficient nozzle injection, or a broken injection pump. You may need to repair or replace the plunger or nozzle, or replace the entire injection pump.
D
downskristinaSep 8, 2025
How does water get mixed into the lubricant oil of my Kubota B1220 Tractor?
- R
  Robert KempSep 9, 2025
  Water can mix into the lubricant oil of your Kubota Tractor if the head gasket is defective or if the cylinder block or cylinder head is flawed. In either case, replacement of the defective parts is necessary.
E
Ethan ShafferSep 12, 2025
What causes high oil pressure in my Kubota B1220?
- P
  Patrick RodriguezSep 12, 2025
  High oil pressure in your Kubota Tractor can be caused by using a different type of oil than specified or a defective relief valve. Use the specified type of oil or replace the relief valve to resolve this issue.

Summary

TO THE READER

Information Section

Section providing general information and safety guidelines.

General Section

Section covering general precautions, maintenance, and special tools.

Mechanism Section

Details on the mechanical structure and operation of tractor components.

Servicing Section

Procedures for maintenance, troubleshooting, and repair of tractor systems.

Information

Safety First

Essential safety instructions and warnings for operating and servicing the tractor.

Safety Decals

Identification and explanation of safety decals placed on the tractor.

Specifications

Technical specifications and data for the tractor models.

Traveling Speeds

Information on the various traveling speeds of the tractor.

Dimensions

Physical dimensions and measurements of the tractor.

General

Tractor Identification

Details on identifying tractor model, serial numbers, and engine information.

Cylinder Number

Information on identifying cylinder numbers on the Kubota diesel engine.

General Precautions

Important precautions to follow during disassembly, assembly, and general servicing.

Lubricants, Fuel and Coolant

Specifications for lubricants, fuel, and coolant for the tractor.

Tightening Torques

Specified tightening torques for various screws, bolts, and nuts.

Maintenance Check List

A comprehensive checklist for scheduled maintenance tasks based on hour meter readings.

Check and Maintenance

Detailed procedures for daily checks and maintenance tasks.

Special Tools

Lists and describes special tools required for engine and tractor servicing.

Tires

Information on tire pressure and tread adjustment for the tractor.

Engine

Troubleshooting Engine

Common engine symptoms, probable causes, and solutions.

Servicing Specifications Engine

Technical specifications and allowable limits for engine components.

Tightening Torques Engine

Specific torque values for engine screws, bolts, and nuts.

Checking, Disassembling and Servicing Engine

Procedures for checking, disassembling, and servicing engine components.

Clutch

Linkage Mechanism Clutch

Diagram and explanation of the clutch linkage mechanism and torque transmission.

Troubleshooting Clutch

Common clutch symptoms, probable causes, and solutions.

Servicing Specifications Clutch

Specifications for clutch components and free travel.

Tightening Torques Clutch

Specified tightening torques for clutch-related components.

Checking, Disassembling and Servicing Clutch

Procedures for checking, adjusting, disassembling, and servicing the clutch system.

Transmission

Structure Transmission

Explains the structural components of the transmission for different models.

Power Train for Traveling System

Details the power flow for the traveling system, including gear shifts.

Power Train for PTO Gear

Explains the power train for the PTO gear system, detailing ranges and shafts.

Shift Linkage Transmission

Illustrates the shift linkage system for various gear selections.

Troubleshooting Transmission

Common transmission and differential issues, causes, and solutions.

Servicing Specifications Transmission

Specifications and allowable limits for transmission and differential components.

Tightening Torques Transmission

Specified tightening torques for transmission and related components.

Disassembling and Servicing Transmission

Procedures for preparing, disassembling, and servicing transmission and related assemblies.

Rear Axle

Structure Rear Axle

Explains the structure and operation of the rear axle and differential system.

Troubleshooting Rear Axle

Common rear axle noises, probable causes, and solutions.

Tightening Torques Rear Axle

Specified tightening torques for rear axle components.

Disassembling and Servicing Rear Axle

Procedures for preparing, disassembling, and servicing rear axle components.

Brakes

Linkage Brakes

Details the linkage mechanisms for the brake system on different models.

Operation Brakes

Explains the operational principles of the brake system, including during braking.

Troubleshooting Brakes

Common brake symptoms, probable causes, and solutions.

Servicing Specifications Brakes

Specifications for brake components like pedal, cam plate, and discs.

Tightening Torques Brakes

Specified tightening torques for brake and rear axle components.

Checking, Disassembling and Servicing Brakes

Procedures for checking, adjusting, disassembling, and servicing brake components.

Front Axle

Structure Front Axle

Explains the structure and operation of the front axle and differential system.

Troubleshooting Front Axle

Common front axle symptoms, probable causes, and solutions.

Servicing Specification Front Axle

Specifications and allowable limits for front axle components.

Tightening Torques Front Axle

Specified tightening torques for front axle components.

Disassembling and Servicing Front Axle

Procedures for separating and disassembling front axle components.

Steering

Structure Steering

Details the steering linkage and power steering system components.

Troubleshooting Steering

Common steering issues, probable causes, and solutions for manual and power steering.

Servicing Specifications Steering

Specifications for steering components like wheel play and pump delivery.

Tightening Torques Steering

Specified tightening torques for steering system components.

Checking, Disassembling and Servicing Steering

Procedures for checking, adjusting, disassembling, and servicing steering components.

Hydraulic System

Hydraulic Circuit

Diagrams of the hydraulic circuits for different tractor models.

Oil Flow

Illustrates the oil flow paths in the hydraulic systems.

Hydraulic Pump

Details the structure and displacement of hydraulic pumps for manual and power steering.

Hydraulic Control Valve

Explains the operation of the hydraulic control valve in neutral, lift, and down positions.

Feedback Linkage for Position Control

Describes the feedback linkage mechanism for implement position control.

Relief Valve

Details the function and specifications of the relief valve in the hydraulic system.

Hydraulic Cylinder

Explains the main components and operation of the hydraulic cylinder.

Hydraulic Block Type Outlet

Describes the hydraulic block type outlet for operating implements.

Rear Hydraulic Outlet

Describes the rear hydraulic outlet for operating implements.

Troubleshooting Hydraulic System

Common hydraulic system symptoms, probable causes, and solutions.

Servicing Specifications Hydraulic System

Specifications for hydraulic pumps and cylinders.

Tightening Torques Hydraulic System

Specified tightening torques for hydraulic system components.

Checking, Disassembling and Servicing Hydraulic System

Procedures for checking, adjusting, disassembling, and servicing hydraulic components.

Electrical System

Wiring Diagram

Wiring diagrams for B1220 (without/with OPC) and B1620/B1820 (various types).

Starting System

Explains the starting system operation and troubleshooting for different models.

Safety Switch and Engine Condition

Details safety switches and engine starting conditions for OPC systems.

Charging System

Information on the charging system, including dynamo and regulator.

Lighting System

Details on the lighting system components, switches, and operation.

Easy Checker

Explanation of the Easy Checker™ system and indicator lamps.

Gauges

Troubleshooting for fuel and coolant gauges.

Servicing Electrical System

Procedures for checking and adjusting battery, main switch, solenoids, relays, glow plugs, starter, and dynamo.

Kubota B1220 Specifications

General

Engine Type	Diesel
Engine Power	12 hp
Drive	4WD
Fuel Capacity	14 liters
Weight	600 kg
Cylinders	3
Cooling	Liquid-cooled
Power Take-off (PTO)	Independent
Rear PTO RPM	540
Displacement	719 cc
PTO Power	9.5 hp
Hydraulic System	Open center
Type	Compact Utility
Clutch	Dry
Brakes	Wet disc