Maintenance and Servicing of Tractor Engines: Key Considerations

during work intervals, tractor operators must always pay attention to engine maintenance. The core is to identify potential hazards and ensure all systems are in normal condition, which can not only avoid startup failures but also prolong the engine's service life. Below are the key points for each component:

 

Fuel Level and Quality

Check the fuel tank level to ensure sufficient fuel supply, avoiding engine stalling after startup due to lack of fuel, which may damage the fuel pump.

Inspect if the fuel has deteriorated, mixed with impurities, or water. If the fuel is turbid or has sediment, replace it in a timely manner (especially for tractors that have been parked for a long time).

Fuel Line Sealing

Check for leaks in fuel lines and joints, and inspect if the fuel pipes are aged or cracked. Replace faulty parts immediately to prevent safety hazards caused by fuel leakage.

In cold seasons, ensure the use of diesel with the corresponding grade (e.g., -10#/-20# diesel for winter) to avoid fuel waxing and blockage of the fuel system.

 

Oil Level and Condition

With the engine cold, pull out the oil dipstick, wipe it clean, reinsert it fully, and then pull it out again. The oil level should be between the upper and lower scales. If insufficient, add oil of the same model; mixing different specifications of oil is strictly prohibited.

Observe the oil color: clear, transparent, or pale yellow indicates normal condition. If the oil is dark black, turbid, or contains impurities, replace the oil and oil filter promptly.

Oil Line Inspection

Check if the oil filter and oil line joints are loose or leaking to prevent engine cylinder scuffing due to insufficient oil pressure.

Coolant Level

Check the level in the expansion tank or radiator. The coolant should be between the MIN (minimum) and MAX (maximum) scales. If insufficient, add coolant of the same model (avoid adding tap water, which may cause scale buildup and block the pipes).

In cold regions during winter, ensure the freezing point of the coolant meets the local temperature to prevent cylinder block and radiator damage from freezing.

Condition of Pipes and Components

Inspect radiators, water pipes, and water pump joints for leaks. Check if water pipes are aged or bulging, and if clamps are tight.

Clean dust, straw, and debris from the radiator surface to ensure unobstructed heat dissipation and avoid engine overheating after startup.

Check the tightness of the fan belt: when pressing the middle of the belt, the deflection should be 10-15mm. Excessively loose belts may slip, leading to poor heat dissipation; overly tight belts can wear bearings.

Storage Battery Condition

Check the battery voltage (normal no-load voltage is approximately 12V/24V). Ensure the battery terminals are clean, tight, and free of oxidation or corrosion. If there is white powdery oxide, rinse with hot water and apply petroleum jelly for rust prevention.

For non-maintenance-free batteries, check the electrolyte level, which should be 10-15mm above the plates. If insufficient, add distilled water (adding tap water or electrolyte is prohibited).

Starting and Ignition System

Check if the starter motor wiring joints are secure, and if the ignition switch and relays are loose.

For diesel engines, inspect the glow plugs (essential in cold weather): turn on the preheating switch and start the engine after the indicator light illuminates to improve cold-start success rate.

 

Air Filter

Check if the air filter element is clean. If there is excessive surface dust, use compressed air to blow it clean from the inside out (for paper filters); replace it if severely clogged.

A damaged filter element will allow dust to enter the cylinder, causing wear to the pistons and cylinder liners - one of the main causes of early engine damage.

Exhaust System

Inspect if the exhaust pipe and muffler are secure and free of damage or air leakage to prevent exhaust gas leakage from affecting the operating environment.

 

Remove oil stains and dust from the engine surface to facilitate the timely detection of leakage points.

Check for debris in the engine compartment to avoid faults caused by debris being drawn into the fan after startup.

Ensure the engine is in neutral and the handbrake is fully engaged to prevent accidental movement of the tractor after startup.

 

Tractors made in China, especially export models, boast reliable quality and advanced technology. With proper maintenance and servicing, they rarely experience major quality issues during daily use, making them trustworthy farm tractors.