The use of motor oil (grease) in various parts of the Jiefang CA1110PK2L2H type vehicle is shown in Table 2-2. Motor oils of similar quality grade and equivalent viscosity grade can be used interchangeably, but must not be mixed. For example, diesel engine oils of the same 40CC grade from any petroleum company, generally can replace each other. However, even with identical quality and viscosity grades, motor oils should not be mixed because the types of additives used in two oils may differ, potentially causing precipitation and affecting performance.
When different types of lubricating greases are mixed, it may lead to uneven distribution of thickening agents, which cannot form a stable structure, thus softening the grease and reducing mechanical stability. Fresh lubricating grease should not be mixed with old grease because the latter contains large amounts of organic acids and impurities that will accelerate the oxidation of fresh grease.
Oil tankers produced by Hubei Chengli Automotive Company will definitely undergo strict testing. After the tank body is formed, the workshop conducts an air-tightness test, followed by a water test after the entire vehicle assembly is completed. After the finished product leaves the warehouse, the technical supervision bureau inspects and issues a tank inspection report. Generally speaking, the tank body will have no quality issues for several years after leaving the factory. Most problems that arise tend to be related to wear-prone components.
I have summarized 17 points that need attention during the regular maintenance of oil tankers. If necessary, I will interpret these points one by one in future dedicated automobile news updates.
1. The driving part that carries the oil tank, commonly referred to as the car chassis. Drivers usually have expertise in this area, but with the addition of an oil pump, we have added a drive shaft and power take-off device to the engine. With these two devices, special attention is required during operation, as improper operation can cause the power take-off device to fail.
2. Use and maintenance of the oil pump. Please strictly follow its user manual, which is provided with the vehicle.
3. Use and maintenance of the fuel dispenser. Please strictly follow its instruction manual, which is provided with the vehicle.
4. Slow oil discharge or inability to pump oil. Check the safety valve and filter mesh. These should be checked and cleaned regularly.
5. The oil tank and pipeline system should be cleaned regularly. Regularly check all connections in the pipeline system to ensure good connection and reliable sealing.
6. To ensure the cleanliness of the oil tank, the oil tank and oil transfer system should be cleaned regularly. Lubricants should be applied to the inner and outer joints of the oil transfer rubber hose ends frequently to make disassembly and assembly easy. After each work session, promptly cover the inlet and outlet end caps (plugs) of the oil pipe to ensure the cleanliness inside the pipe.
7. The oil loading capacity should not exceed the rated load capacity (calculated according to the density of the oil).
8. The medium passing through the ball valve should not be too dirty to protect the seal ring and extend the life of the ball valve. Ball valves should not operate for long periods in a half-open, half-closed state, which can easily cause the seal ring to deteriorate. During driving, all ball valve handles should be in the closed position.
9. The pump intake screen should be cleaned regularly to prevent oil residue from clogging the filter screen, which could affect flow.
10. Keep the breather valve clean to ensure it remains operational. The spring inside the valve must not be arbitrarily replaced to avoid affecting the suction and exhaust effects. A blocked breather valve poses the risk of deforming the tank body.
11. To prevent fires on oil tankers, do not use metallic objects to strike components of the tanker if the exhaust pipe, silencer, pipes, or conductive electrodes are damaged or broken. This avoids sparking. Firefighting equipment should always be ready on the oil tanker.
12. If the sediment tank under the oil tank freezes, do not roast it with fire. Use hot steam to melt it or move the vehicle into a warm room to thaw.
13. Before operating the fuel tanker, the grounding rod must be inserted into damp soil, and the grounding strap must be grounded. The electrostatic grounding should be maintained throughout the operation.
14. Before departure, check the installation of the fire extinguisher. Users of fuel tankers should be familiar with how to use the fire extinguisher and inspect and maintain it according to its instructions.
15. Before operating the fuel tanker, check for leaks in the pipeline system, whether the grounding wire is disconnected, and if the exhaust pipe is damaged. Any issues found should be resolved before starting operations.
16. Measure oil according to relevant regulations. In winter, if there is water in the self-priming pump, it must be drained completely to prevent freezing and cracking of the pump body.
17. When entering the oil tank for work, ensure good ventilation and have someone outside guarding. If necessary, wash the tank body with soapy water before proceeding.
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