Kubota D1305-E3BG - User Manual

Questions and Answers

A
ashleywhiteAug 4, 2025
What to do if Kubota Engine suddenly stops?
- B
  Brian PalmerAug 4, 2025
  If your Kubota Engine suddenly stops, first check the fuel tank and refill if necessary, also check the fuel system for air or leaks. A bad nozzle can also cause this, so replace it with a new one if needed. Additionally, moving parts may be overheated due to a shortage of lubrication oil or improper lubrication. Check the engine oil level with the oil level gauge and inspect the lubricating oil system. Replace the oil filter cartridge every two oil changes.
M
Melanie ShahAug 8, 2025
How to start a Kubota Engine that is difficult to start?
- B
  Brandy BrennanAug 8, 2025
  If you're finding it difficult to start your Kubota Engine, begin by checking the fuel tank and fuel filter for any water, dirt, or impurities, cleaning the filter with kerosene. Air or water in the fuel system can also be the culprit; check for loose fuel line couplings or cap nuts and eliminate air from the fuel system by loosening the joint bolt stop fuel filter and air vent screws of fuel injection pump. In cold weather, thick engine oil can slow cranking, so change the oil grade according to the temperature. Lastly, a discharged battery can prevent the engine from cranking, so charge the battery and, in winter, remove it for indoor storage, installing it only when needed.
M
Mary FranklinAug 12, 2025
What to do if Kubota D1305-E3BG Engine must be stopped immediately due to overheating?
- B
  Brandi HarrisAug 12, 2025
  To address Kubota Engine overheating, first, check the oil and coolant levels and replenish if needed. Inspect the fan belt for damage or looseness and replace or adjust it. Clean any dust from the radiator net or fins. If the issue persists, consider that the excessive antifreeze concentration may be the cause, so add only water or switch to the specified coolant mixture. Other potential causes include a defective fan, radiator, radiator cap, thermostat, temperature gauge, or sensor, which would require replacement. Overload running can also cause overheating, so reduce the load. Finally, a defective head gasket or water leakage or unsuitable fuel may be the cause, requiring parts replacement or using the specified fuel.
R
Rachel GarzaAug 17, 2025
Why the color of exhaust is especially bad from Kubota D1305-E3BG?
- H
  hlaneAug 17, 2025
  If the exhaust color from your Kubota Engine is especially bad, the fuel may be of extremely poor quality. Use only good quality fuel, specifically No. 2-D diesel fuel. Another potential cause is a bad nozzle, which would need replacement with a new one.
J
jennaharrisAug 21, 2025
What to do if color of exhaust suddenly turns dark in Kubota D1305-E3BG?
- G
  Guy BakerAug 21, 2025
  To address the issue of the exhaust color suddenly turning dark in your Kubota Engine, check the fuel injection system, especially the fuel injection nozzle.
F
Faith WestAug 26, 2025
What to do if oil lamp lights up during Kubota D1305-E3BG operation?
- S
  Shane FarrellAug 26, 2025
  To address the issue of the oil lamp lighting up during Kubota Engine operation, check the lubricating system. Also, check the function of the relieve valve in the lubricating system, the pressure switch, and the filter base gasket.
F
frostkevinAug 29, 2025
What to do if bearing parts are overheated in Kubota Engine?
- L
  Lauren AdamsAug 30, 2025
  Check the lubricating system of your Kubota Engine if bearing parts are overheated.

Summary

SAFE OPERATION

OBSERVE SAFETY INSTRUCTIONS

Read and understand the operator's manual and engine labels before starting.

WEAR SAFE CLOTHING AND PERSONAL PROTECTIVE EQUIPMENT (PPE)

Wear appropriate clothing and PPE to prevent injury from moving parts.

CHECK BEFORE STARTING & OPERATING THE ENGINE

Inspect engine, guards, and ensure safe distance before starting operation.

KEEP THE ENGINE AND SURROUNDINGS CLEAN

Keep the engine and surroundings clean to prevent fire and ensure proper operation.

SAFE HANDLING OF FUEL AND LUBRICANTS -KEEP AWAY FROM FIRE

Handle fuel and lubricants safely, away from ignition sources, in ventilated areas.

EXHAUST GASES & FIRE PREVENTION

Ensure ventilation, keep engine clean, and check for leaks to prevent fire hazards.

ESCAPING FLUID

Relieve pressure before disconnecting lines and use caution with escaping fluids.

CAUTIONS AGAINST BURNS & BATTERY EXPLOSION

Be cautious of hot components, battery hazards, and pressure release points.

KEEP HANDS AND BODY AWAY FROM ROTATING PARTS

Keep hands and body clear of rotating parts like fans and belts to prevent injury.

ANTI-FREEZE & DISPOSAL OF FLUIDS

Handle anti-freeze safely and dispose of fluids according to environmental regulations.

CONDUCTING SAFETY CHECKS & MAINTENANCE

Perform safety checks and maintenance on a level surface, with the engine off and battery disconnected.

WARNING AND CAUTION LABELS

Understand and care for warning and caution labels for safe operation.

CARE OF WARNING AND CAUTION LABELS

Keep labels clean, replace damaged ones, and affix new labels correctly.

SERVICING OF THE ENGINE

NAMES OF PARTS

PRE-OPERATION CHECK

BREAK-IN

Follow specific procedures for engine break-in period, including oil change after 50 hours.

DAILY CHECK

Perform daily checks on engine condition, fluid levels, and parts before starting operation.

OPERATING THE ENGINE

STARTING THE ENGINE(NORMAL)

Follow step-by-step instructions for starting the engine under normal conditions.

COLD WEATHER STARTING

Specific procedure for starting the engine in cold temperatures, including preheating.

STOPPING THE ENGINE

Steps to properly shut down the engine, including returning levers and removing the key.

RADIATOR COOLING WATER (COOLANT) CHECK

Check coolant level and look for leaks when the engine is running.

OIL PRESSURE LAMP CHECK

Monitor the oil pressure lamp to ensure adequate oil pressure during operation.

COLOR OF EXHAUST

Monitor exhaust color for indications of normal operation or potential issues.

REVERSED ENGINE REVOLUTION AND REMEDIES

HOW TO TELL WHEN THE ENGINE STARTS RUNNING BACKWARDS

Symptoms and signs indicating the engine is running in reverse.

REMEDIES

Steps to take to stop and correct reversed engine operation.

MAINTENANCE

SERVICE INTERVALS

PERIODIC SERVICE - FUEL

PERIODIC SERVICE - ENGINE OIL

PERIODIC SERVICE - RADIATOR

PERIODIC SERVICE - AIR CLEANER

PERIODIC SERVICE - BATTERY

FAN BELT

ADJUSTING FAN BELT TENSION

Procedure for checking and adjusting fan belt tension for optimal performance.

ELECTRIC WIRING

DIRECTION FOR LONG TERM STORAGE

CARRIAGE AND STORAGE

TROUBLESHOOTING

SPECIFICATIONS

WIRING DIAGRAMS

Kubota D1305-E3BG Specifications

General

Engine Model	D1305-E3BG
Number of Cylinders	3
Fuel System	Indirect injection
Cooling System	Water-cooled
Aspiration	Naturally aspirated
Lubrication System	Forced lubrication
Starting System	Electric Starter
Engine Type	Vertical, water-cooled, 4-cycle
Weight	120 kg