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"Substitute parts" are used for long
In the operation of maintenance vehicles, some drivers tend to use makeshift substitutes for damaged or missing small parts. While these temporary solutions may seem practical in the short term, they are generally not recommended for long-term use. Using substitute parts can lead to more serious issues and even cause mechanical failure. Therefore, it's crucial to replace original parts with the correct ones as soon as possible.
1. **Bolt, Cork, or Rag as a Drain Plug Substitute**
When the drain plug is damaged or missing, some drivers try using bolts, corks, or rags as a quick fix. However, this approach is risky, especially during winter when draining water from the vehicle is essential. It can lead to unintended coolant leakage and potentially cause engine component cracks. To avoid such problems, it's best to replace the drain plug promptly with the proper part.
2. **Asbestos or Cotton Yarn Instead of Copper Gaskets**
Copper gaskets on injectors and spark plugs help prevent fuel gas leaks and ensure efficient heat dissipation. Some drivers attempt to seal leaks by wrapping asbestos or cotton yarn around the gasket. While this might work temporarily, long-term use can lead to overheating of the injectors and spark plugs, reducing performance and possibly causing them to fuse. It can also 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 instead can result in deformation or even breakage over time, leading to mechanical damage and safety risks.
4. **Coarse Bolts Instead of Fine Bolts**
Fine-threaded bolts often have anti-loosening features, especially in critical areas. Replacing them with coarse-threaded bolts can cause loosening, leading to connection failure and potential damage to the connected parts.
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 lead to mechanical failure or damage.
6. **Different Plunger or Injector Models Used as Substitutes**
When a plunger or injector fails, some drivers replace it with a different model due to lack of availability. However, differences in diameter, stroke, spray angle, and pressure can cause engine instability, reduced power, and poor performance.
7. **High-Capacity Batteries Instead of Original Ones**
Some drivers install larger batteries to ensure easier starting. However, this can lead to undercharging and excessive discharge, reducing battery life and efficiency.
8. **Incorrect Belt Types Used as Substitutes**
Using incorrect types of V-belts can cause uneven stress, leading to premature wear of belts, fans, pumps, and pulleys. This can also damage bearings and reduce overall system performance.
9. **Non-Standard High-Pressure Fuel Pipes Used**
Replacing a damaged high-pressure fuel pipe with a non-standard one can affect fuel delivery timing and volume, leading to engine misfires and loss of power. Always use the same type of standard fuel pipe for replacement.
10. **Mixing Different Oils**
Using different oils—such as steam engine oil, diesel oil, hydraulic oil, or transformer oil—can change their properties, leading to poor lubrication, cooling, and sealing. For example, using ordinary gear oil instead of hypoid gear oil can damage gears, while using brake fluid in place of hydraulic oil can cause air bubbles, making brakes unreliable.
In conclusion, while using substitute parts may seem convenient, it’s always better to follow manufacturer guidelines and use original or approved replacements. Doing so ensures the safety, reliability, and longevity of your vehicle.