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"Substitute parts" are used for long
In the operation of maintenance vehicles, some drivers tend to use substitute parts for small damaged or missing components, thinking they are "similar" alternatives. However, while these substitutes might work temporarily in emergencies, relying on them long-term can lead to further mechanical issues and even serious damage. Therefore, it's important to replace original parts as soon as possible instead of using makeshift solutions.
1. **Bolts, Corks, or Rags as Drain Plug Alternatives**
When a drain plug is damaged or missing, some drivers may try using bolts, corks, or rags as temporary fixes. This is not advisable, especially in cold weather when proper drainage is crucial. If water isn't properly drained, it can freeze inside the system, leading to cracked engine components. It’s best to replace the drain plug immediately once it's damaged.
2. **Asbestos or Cotton Yarn Instead of Copper Gaskets**
Copper gaskets are used on injectors and spark plugs to prevent fuel leakage and ensure efficient heat dissipation. Some drivers may wrap asbestos or cotton yarn around leaks to create a temporary seal. While this might work in an emergency, prolonged use can cause overheating of the injectors and spark plugs, leading to poor performance or even sintering. Additionally, it can alter the injection distance, affecting combustion efficiency.
3. **Regular Bolts Instead of Special Bolts**
Engine components like connecting rods, cylinder heads, and fuel injectors require special bolts designed to handle high torque. Using regular bolts in place of these can result in deformation or even breakage over time, which can cause serious mechanical failure.
4. **Coarse Bolts Instead of Fine Bolts**
Fine-threaded bolts often have anti-loosening features and are used in critical areas. Replacing them with coarse bolts can lead to loosening, causing connection failures and potential damage to the components involved.
5. **Flat Washers Instead of Spring Washers**
Spring washers help prevent bolts from loosening, while flat washers do not. Using flat washers in place of spring washers increases the risk of bolt loosening, which can damage the connected parts.
6. **Different Types of Injectors or Plungers Used as Substitutes**
Some drivers may replace faulty plungers or injectors with similar models due to lack of availability. However, differences in diameter, stroke, spray angle, and pressure can cause unstable engine performance and reduced power output if used long-term.
7. **High-Capacity Batteries Instead of Original Ones**
Using a larger battery than required can lead to undercharging and reduce its lifespan. The battery may remain in a discharged state for extended periods, ultimately shortening its service life.
8. **Incorrect Belts Used as Substitutes**
Using different types of V-belts can lead to uneven stress on pulleys, causing premature wear. It can also affect the performance of fans, pumps, and other components, potentially damaging bearings.
9. **Non-Standard High-Pressure Fuel Pipes Used as Substitutes**
Replacing a damaged high-pressure fuel pipe with an incorrect one can change the fuel delivery timing and quantity, leading to engine instability and loss of power. Always use the correct standard fuel pipe when replacing.
10. **Mixing Different Oils**
Using oils such as steam engine oil, hydraulic oil, or transformer oil interchangeably can harm the engine. For example, using general gear oil instead of hypoid gear oil can cause early damage, while using hypoid oil in non-hypoid systems can lead to corrosion. Similarly, substituting brake fluid with ordinary hydraulic oil can increase air resistance and make braking unreliable.