Contents

SAFE OPERATION
SERVICING OF THE ENGINE
NAMES OF PARTS
PRE-OPERATION CHECK
- BREAK-IN
- DAILY CHECK
- To prevent trouble from occurring, it is important to know the conditions of the engine well. Che...
OPERATING THE ENGINE
- STARTING THE ENGINE(NORMAL)
- COLD WEATHER STARTING
- STOPPING THE ENGINE
- CHECKS DURING OPERATION
  - B Radiator Cooling water(Coolant)
  - B Oil pressure lamp
  - B Fuel
  - B Color of exhaust
  - B Immediately stop the engine if;
- REVERSED ENGINE REVOLUTION AND REMEDIES
  - B How to tell when the engine starts running backwards
  - B Remedies
MAINTENANCE
- SERVICE INTERVALS
PERIODIC SERVICE
- FUEL
  - B Fuel level check and refueling
  - B Air bleeding the fuel system
  - B Checking the fuel pipes
  - B Fuel filter cartridge replacement
- ENGINE OIL
  - B Checking oil level and adding engine oil
  - B Changing engine oil
  - B Replacing the oil filter cartridge
- RADIATOR
  - B Checking coolant level, adding coolant
  - B Changing coolant
  - B Remedies for quick decrease of coolant
  - B Checking radiator hoses and clamp bands
  - B Precaution at overheating
  - B Cleaning radiator core (outside)
  - B Cleaning the radiator (inside)
  - B Cleaning the radiator
  - B Anti-freeze
- AIR CLEANER
  - B Dust indicator (optional)
- ELECTRIC WIRING
- FAN BELT
  - B Adjusting Fan Belt Tension
CARRIAGE AND STORAGE
- CARRIAGE
- STORAGE
TROUBLESHOOTING
- If the engine does not function properly, use the following chart to identify and correct the cause.
SPECIFICATIONS
WIRING DIAGRAMS

Kubota D1403-EBG Operator's Manual

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Kubota D1403-EBG Engine Specification

The Kubota D1403-EBG engine is a compact and powerful diesel engine renowned for its reliability and efficiency. It is part of Kubota's 03 Series, known for delivering high performance in a variety of applications. The engine features a three-cylinder, four-cycle, water-cooled design, which ensures optimal thermal management and durability. With a displacement of 1.398 liters, the D1403-EBG provides a balance of power and fuel efficiency, making it suitable for industrial and agricultural machinery.

This engine operates at a rated power output of approximately 30.1 horsepower at 2800 RPM, delivering robust performance for its size. It utilizes an indirect injection combustion system, which enhances fuel atomization and contributes to lower noise levels and reduced emissions. The D1403-EBG complies with stringent emission regulations, including EPA Tier 4 and EU Stage V standards, making it environmentally friendly.

The engine's compact dimensions and lightweight construction facilitate easy integration into various equipment without compromising performance. It includes a high-torque capability at low RPMs, ensuring effective operation under demanding conditions. The D1403-EBG is engineered with a durable construction, featuring a cast iron block and cylinder head, which enhances longevity and reduces vibration.

Maintenance is simplified through accessible service points, reducing downtime and operational costs. The engine is equipped with a reliable lubrication system and an efficient cooling mechanism that further enhance its operational lifespan. With its blend of power, efficiency, and compliance with modern emission standards, the Kubota D1403-EBG engine is an excellent choice for manufacturers seeking a dependable power solution for their machinery.

Kubota D1403-EBG Engine F.A.Q.

What type of oil should be used in the Kubota D1403-EBG engine?

Use high-quality diesel engine oil with a classification of API CF or higher. The recommended viscosity is SAE 10W-30 or SAE 15W-40, depending on the ambient temperature.

How often should the oil be changed in the Kubota D1403-EBG engine?

The engine oil should be changed every 100 hours of operation or annually, whichever comes first. Always refer to the operator's manual for specific maintenance schedules.

What is the correct procedure for bleeding air from the fuel system?

To bleed air from the fuel system, loosen the air vent plug on top of the fuel filter. Pump the fuel with the priming pump until air bubbles are no longer present, then tighten the air vent plug.

How can I troubleshoot starting issues with the Kubota D1403-EBG engine?

Check the battery charge and connections, ensure there is adequate fuel, and verify the condition of the starter motor and solenoid. Inspect for any air leaks in the fuel system.

What is the recommended coolant for the Kubota D1403-EBG engine?

Use a 50/50 mix of long-life antifreeze and distilled water. Ensure the antifreeze is suitable for use in diesel engines and provides protection against corrosion and freezing.

How do I check and adjust the valve clearance on the Kubota D1403-EBG engine?

First, remove the valve cover. Rotate the engine to top dead center (TDC) on the compression stroke for the cylinder you are adjusting. Use a feeler gauge to measure the gap between the rocker arm and the valve stem, and adjust to the specified clearance.

What should be done if the engine overheats?

Stop the engine immediately and allow it to cool. Check the coolant level, radiator cap, and for any obstructions in the radiator fins. Ensure that the fan belt is intact and properly tensioned.

How often should the air filter be replaced or cleaned?

Inspect the air filter every 100 hours of operation and replace or clean it if necessary. In dusty conditions, more frequent inspection and maintenance may be required.

What is the procedure for replacing the fuel filter on the Kubota D1403-EBG engine?

Shut off the fuel valve, remove the old filter, and install a new one. Open the fuel valve and bleed the fuel system to remove air. Check for leaks after installation.

How can I improve the fuel efficiency of the Kubota D1403-EBG engine?

Maintain regular service intervals, ensure the air filter is clean, keep the fuel injectors in good condition, and operate the engine within the recommended load and speed range.