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What Causes High Oil Temperature in Excavators?

2 Answers

DamianLee

07/29/25 6:13am

It may be caused by internal fuel leakage, leading to excessive hydraulic oil friction and high oil temperature. The effects of oil pump leakage are as follows: it can cause weak acceleration and braking when suddenly accelerating; it can cause abnormal noises, such as a buzzing sound while driving; it can make the vehicle difficult to start, requiring prolonged key turning. Reasons for oil pump leakage: issues with the sealing rings of the moving or stationary rings: reliability and cost factors are the main considerations, as electric pumps require additional power supply and have inferior durability compared to mechanical ones. Particle ingress: particles entering the sealing surfaces of the stationary and moving rings during operation. Excessive compression during mechanical seal installation: causing damage to the friction pair surfaces, leading to oil leakage. The high-pressure oil pump achieves sealing through sealing rings, possibly simple squeeze-type sealing rings.

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Cassandra

08/12/25 9:41am

I've been operating excavators for several years and have encountered many issues with high oil temperature. The most common cause is a clogged radiator, especially when working on construction sites where dust and dirt accumulate, blocking airflow and reducing cooling efficiency. Another major issue is insufficient or degraded coolant; if the water pump fails and can't circulate properly, the oil temperature rises quickly. Regarding engine oil, low oil levels or a worn-out oil pump can lead to poor oil circulation, and a clogged oil filter can cause debris to obstruct the flow, raising the oil temperature. Excessive workload is also a factor—for example, digging hard materials nonstop for long periods strains the engine, causing the oil temperature to spike. This is even more noticeable in hot weather. Before each shift, I always check the oil level and radiator fins, clearing any debris. If I notice anything unusual, I stop immediately and let the machine cool down to prevent damage. Regularly changing the oil and filters really helps prevent problems before they occur.

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Does Water in the Engine Affect the Car?

Water in the engine does affect the car. The impacts of water in the engine include: 1. Engine failure. 2. Short circuits in engine circuits and wiring. 3. Damage to the driving system. 4. Contamination of lubricating oil. 5. Transmission damage. 6. Damage to the boxing system. 7. Damage to other instruments or components. After water enters the engine, the following checks should be performed: 1. First, check if there is water in the engine cylinders: Water can cause the connecting rods to bend and damage the engine. If it is confirmed that water has entered the engine, the spark plugs should be removed, the fuel supply system and ignition system should be manually cut off, and then the engine should be run using the starter motor to allow the water to drain out smoothly. 2. Check the condition of the oil in various vehicle systems: To avoid foaming, cloudiness, and other phenomena after water ingress, which can lead to oil degradation and loss of lubrication. Water may carry sand particles, causing excessive engine wear, so timely cleaning and replacement are necessary. After testing, the electrical connection components inside the engine compartment should be cleaned to prevent corrosion and sand accumulation due to moisture. Components such as the fuse box, sensor plugs, and areas prone to water accumulation should also be cleaned.

Are There Any Tips for the Curve Driving Test in Subject 2?

Here are the tips for the curve driving test in Subject 2, using the left entrance as an example: 1. Before entering the curve driving lane, pay attention to the position of the front of the car and try to align it with the center of the lane; 2. When the right 1/3 of the car's front intersects with the right edge of the lane, it means the front of the car has entered the curve lane. At this point, observe the left front corner of the car; 3. When the left front corner of the car coincides with the right edge of the lane (shorter individuals may need to slightly exceed the edge, while taller individuals do not need to press against the edge), turn the steering wheel one full turn to the left, keeping the left front corner of the car aligned with the right edge of the lane; 4. When the left front corner of the car coincides with the left edge of the lane, return the steering wheel to the center; 5. When the right front corner of the car coincides with the left edge of the lane, turn the steering wheel one full turn to the right, keeping the right front corner of the car aligned with the left edge of the lane; 6. As you approach the exit of the curve driving section, when the front of the car is aligned with the center of the lane, gradually return the steering wheel to the center. Check the side mirrors to ensure the wheels are parallel with the lane edges, then fully straighten the steering wheel and exit the curve driving test lane.

How to Reverse at an Intersection for Beginners

Here are the methods for beginners to reverse at an intersection: 1. Reverse using rearview mirrors: Use the right rearview mirror to judge the distance between the rear wheels and the curb to determine the steering wheel turning range. 2. Reverse by looking through the rear window: Hold the upper edge of the steering wheel with your left hand, turn your body to the right, and observe the rear by turning your head toward the rear window while reversing. 3. Reverse by looking sideways: Hold the upper end of the steering wheel with your right hand, lean your upper body out of the driver's cabin to the left, turn your head to look backward, and observe the situation while reversing. Here are the key points about reversing: 1. Maintain the correct posture when reversing, select a reversing target to control the steering wheel turning degree and ensure reversing accuracy. 2. When selecting a target, choose one that is obvious, easy to observe, solid and safe, not easily hit by vehicles, and has a contrast angle. 3. While reversing, observe the surrounding situation clearly, stabilize the throttle, control the speed, avoid sudden acceleration or deceleration, and always be prepared to stop. 4. The steering wheel operation is the same as when moving forward. If the car deviates to the left (right), immediately turn slightly to the right (left), and straighten the steering wheel after the rear of the car is aligned.

What does the yellow background 30km/h sign mean?

The yellow background 30km/h sign actually indicates an advisory speed, meaning the traffic authority recommends drivers to maintain this speed when passing through this section. This sign does not mandate driving below 30km/h. Below are the meanings of different colored signs: 1. Yellow rectangle with numbers: Advisory speed sign - the number indicates the recommended passing speed for this section. 2. Blue circle with white background and white numbers: Minimum speed sign - the number indicates the minimum speed of 50km/h for this section. 3. Red circle with black numbers: Maximum speed sign - the number indicates the maximum speed of 40km/h for this section.

Can Car Air Conditioning Provide Heating?

Heating is generated by utilizing the car's own heat circulation system and does not require the compressor to work. Here are the relevant details: 1. Internal Circulation: Internal circulation primarily prevents external dust and harmful gases from entering the car in a timely and effective manner. For example, when driving through areas with smoke, dust, unpleasant odors, or in heavy traffic, it blocks harmful exhaust emissions from vehicles ahead. Another function is to maintain warmth. 2. External Circulation: External circulation mode uses a fan to draw outside air into the car, meaning the air passage between the outside and inside of the car is open. The air blown by the fan comes from outside, so even if the fan is off, airflow is still drawn into the car while driving, replenishing fresh air inside. Sometimes, you may feel airflow even when the fan is off, which is due to the external circulation setting being enabled.

How to Solve Low Tire Pressure?

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