What does P552561 fit?

SANY  SY 195SY 195-9SY 205 C-8SY 205 C-9SY 205 C-9SY 215-8SY 215 C-8SY 215 C-9SY 215 C-9SY 220 C-9SY 225 C-9
SCHAFFER  2445 S3650 T4670 T
TCM  FD 100-9FD 60-9
XCMG  XE 55 E
ZOOMLION  ZA 14 J CRZS 1623 RT CRZT 20 JZT 20 J CR

Professional Sany Fuel Filter P552561 B222100000521 60201217

Q: How to tell if a fuel filter needs replacing?

To determine whether the fuel filter needs to be replaced, a comprehensive assessment can be from two aspects: the vehicle's operating performance and mileage/usage environment. The following are the key criteria for judgment:
• Decreased power: When accelerating rapidly, there is a lack of power, and under heavy loads (such as climbing or full load), the power is significantly insufficient. It is necessary to press the accelerator deeply to obtain normal feedback.
• Difficulty starting: The car needs to be started multiple times when it is cold or hot, and may even fail to start, especially after troubleshooting issues such as the battery and spark plugs.
• Idle shaking: The engine shakes significantly at idle, which may be due to poor fuel supply and insufficient combustion of the mixture.

• Dragging phenomenon: There is a feeling of "jerking" during driving, similar to the feeling of tripping, which is more common when going uphill or accelerating.
• Abnormal fuel condition: Remove the filter and release the fuel. If the oil color turns black, turbid, or has obvious impurities or sediment, it indicates that the filter element has failed.
⚠️ Attention: The above symptoms may also be caused by clogged fuel injectors, fuel pump malfunctions, etc. It is recommended to first check other oil circuit components before confirming whether it is a filter problem.

Q: Can I clean a fuel filter instead of replacing it?

It is not recommended to clean the fuel filter, but to replace it regularly. The reasons are as follows:
Fuel filters are mostly disposable components: whether they are external or internal filters, their internal filter elements are usually made of paper or synthetic materials, designed as "disposable". Cleaning them is difficult to restore their filtering performance, and may even damage the filter element structure.

Cleaning cannot completely remove impurities: Impurities in the fuel (such as rust, gum, dust, etc.) will be embedded in the micropores of the filter material, and conventional cleaning cannot completely remove them. Continuing to use will still cause poor fuel supply or clogged fuel injectors.
There are safety and performance risks: forced cleaning may cause the filter element to rupture or seal to fail, allowing unfiltered impurities to enter the fuel system, causing wear and tear on precision components such as high-pressure fuel pumps and fuel injectors. The maintenance cost is much higher than replacing the filter element.

Q: How to clean a diesel fuel filter without removing it?

The cleaning process is performed without disassembling the diesel filter, primarily to remove accumulated impurities, moisture, and some sludge from the interior, while avoiding damage to the seal and filter element caused by frequent disassembly and reassembly.

Feasible Methods for Cleaning the Diesel Filter Without Disassembly

• Apply fuel system cleaning additive:
Add the dedicated diesel fuel system cleaner (such as products containing polyisobutyleneamine PIBA) in proportion to the fuel tank, and flush the interior of the filter by allowing the fuel to flow during normal engine operation. This method is gentle, safe, and suitable for routine maintenance.

• Remove bottom impurities using gravity sedimentation:
1. Turn off the fuel tank switch, disconnect the fuel inlet pipe of the filter, or use its built-in drain plug (most modern diesel filters have one at the bottom).
2. Open the screw plug or loosen the joint, allowing the fuel in the filter to flow into a clean container. After settling, separate the water and impurities.
3. After the fuel has completely drained, re-tighten the plug and restore the fuel line connection.
• Short-term flushing with diesel or kerosene (requires caution):
After the engine has completely cooled, add a small amount of clean diesel or kerosene (not exceeding 10% of the tank) to the fuel tank, then start the engine and let it idle for 3–5 minutes to flush the inner walls of the filter element with the more fluid liquid.

Precautions

• Paper filters are not reusable: Most diesel filters use disposable paper elements, which should not be cleaned repeatedly, as this may reduce filtration efficiency or cause damage. If the filter is visibly clogged or has been in use for more than 100–200 hours (depending on the model), it should be replaced directly.
• Avoid using high-pressure water guns or strong alkaline/acidic cleaning agents: these can damage the filter element structure or seals.
• After cleaning, always check the sealing: After reconnecting the oil pipe or tightening the plug, start the engine to check for any leaks.