Loader water tank overflow 4 common fault points and repair skills

By Alec March 25th, 2025 59 views

The water inlet of the loader water tank spills water, which not only wastes coolant, but also may cause serious problems such as engine overheating. Timely troubleshooting and repair of the root cause of the fault is the key to ensure the normal operation of the equipment. This article will focus on the "loader water tank overflow reasons" "Loader water tank overflow maintenance" detailed 4 common fault points and targeted repair skills, to help you quickly solve the problem.

1. Excessive coolant filling: the most intuitive water overflow inducement

Fault analysis

The coolant capacity of the loader water tank has strict standards. If it is filled too much, the pressure in the water tank will rise after heat expansion, and eventually overflow from the water inlet. This is the "loader tank overflow reason" in the most easy to check the problem.

Repair technique

1. After shutdown and cooling, open the tank cover and observe whether the coolant level exceeds the highest scale line.
2. Use special tools to extract excess coolant until the liquid level is reduced to the standard range.
3. Check the coolant quality. If impurities or oil are mixed, thoroughly replace and clean the cooling system.

Second, cylinder gasket damage: hidden internal leakage hazards

Fault analysis

The cylinder gasket damage will cause the high-pressure gas in the cylinder to enter the cooling system, so that the coolant is heated and violently boiling, resulting in water overflow. At this time, the overflow is usually accompanied by engine power decline, exhaust pipe white smoke and other symptoms, which is a typical manifestation of "loader cylinder pad failure caused by water tank overflow".

Repair technique

1. Check whether the oil is emulsified (milky white) after stopping, if it exists, it can be preliminarily judged as cylinder gasket damage.
2. Disassemble the engine, replace the new cylinder gasket, and check whether the cylinder block and head are deformed or corroded.
3. After reassembly, pressure test is carried out to ensure the sealing of the cooling system.

Third, thermostat failure: the "culprit" leading to abnormal coolant circulation

Fault analysis

If the thermostat is stuck or fails, the coolant will not be able to circulate normally, resulting in local overheating of the engine, sudden increase of pressure in the water tank, and resulting in water overflow. This failure is often ignored, but it is the direct cause of "loader thermostat failure caused by water tank overflow".

Repair technique

1. Start the engine and observe whether the water temperature meter rises rapidly.
2. Remove the thermostat and put it in hot water to test whether the opening temperature meets the standard (usually 80-85℃).
3. If the thermostat is damaged, replace it with a new product of the same model and refill the coolant.

Fourth, the water tank cover is not tightly sealed: the details are ignored

Fault analysis

Aging or deformation of the rubber seal ring of the water tank cover will cause it to be unable to seal effectively, so that the pressure in the water tank can not be maintained, and the coolant will overflow from the water filler at the normal working temperature. This is a common situation of "loader water tank cover failure resulting in overflow".

Repair technique

1. Check whether the sealing ring of the water tank cover is cracked, hardened or deformed.
2. Replace the new water tank cover and ensure that it is tightly fitted to the water tank mouth.
3. Test the tightness of the new water tank cover, and check whether the opening pressure meets the requirements through the pressure tester.

Fifth, preventive measures: reduce the incidence of overflow failure

1. Check the coolant level regularly to avoid overfilling.
2. Replace the coolant and water tank cover according to the maintenance period to prevent the aging of the seal ring.
3. Pay attention to the working temperature of the engine, and stop the engine in time if any abnormality is found.
4. Avoid long-term overload operation and reduce the pressure on the cooling system.

Conclusion: Accurate investigation, efficient repair
There are various reasons for the overflow of the loader water tank, and systematic investigation should be carried out according to the specific symptoms. Through the four common fault points and repair skills such as "excessive coolant filling" and "cylinder gasket damage" summarized in this paper, together with "loader water tank overflow maintenance", it can help the operator and maintenance personnel to quickly locate the problem and take targeted measures. Attention to detail inspection in daily maintenance can effectively prevent water overflow failure and ensure the efficient and stable operation of the loader.

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