What does P551430 fit?

NEUSON  18002
NEW HOLLAND  LB 100 BRG 140
SDMO  DX 6000 TE-XL
SKOGS JAN  487 CAT495 CAT695 CAT
STEYR  9080 MT9090 MT91009100 MTCVT 120CVT 130CVT 150CVT 170M 9100

Professional Water Separator Fuel Filter P551430 BF7679-D BF7679D BF7906-D BF9847D

Q: Are all fuel water separators the same size?

The size of fuel water separators on cars varies, and their specifications differ depending on the model, purpose, and design requirements. There are significant differences in the following aspects of automotive oil-water separators:
Import and export caliber: Common sizes include 8mm, 10mm, 12mm, etc. Large vehicles (such as trucks) often use 12mm to ensure flow, while sedans often use 8mm or 10mm to accommodate compact spaces.
Filtering accuracy: usually 5 μ m or 10 μ m, heavy-duty vehicles require higher accuracy (5 μ m) to cope with harsh working conditions, while ordinary household vehicles can meet daily needs with 10 μ m.
Material: including aluminum alloy (lightweight, low-cost, mostly used in cars) and stainless steel (corrosion-resistant, durable, mostly used in commercial vehicles).
Installation size and structure: Some models integrate the oil-water separator with the diesel filter, and the overall size and interface vary depending on the engine model; In addition, different brands (such as Dongfeng Caput N300) have different maintenance requirements for replacement cycles, exhaust air, etc., indirectly reflecting their structural differences.
Therefore, the car oil-water separator is not a universal component, and the selection must be based on the specific vehicle model, engine type, and manufacturer's recommended matching specifications.

Q: How to bleed air from fuel water separator?

Discharging the air from the car oil-water separator is an important operation to ensure the normal start-up and operation of diesel engines. The following standard exhaust steps are recommended:

General exhaust steps

1. Safety preparation
Park the vehicle in a flat and safe area.
Turn off the engine and tighten the handbrake.
2. Locate the oil-water separator: usually located in the engine compartment or near the chassis fuel lines, near the fuel filter.
3. Discharge of fluid accumulation
Place a container of approximately 0.2L under the drain plug.
Loosen the oil drain bolt counterclockwise, drain the accumulated water or impurities for about 10 seconds, and tighten clockwise after the effluent is clear.

4. Exhaust operation (core steps)
Find the exhaust bolt (usually at the top of the filter element, mostly an internal hexagon or hexagon bolt).
Loosen the exhaust bolt (only loosen, do not completely remove).
Use any of the following methods to exhaust until there are no bubbles and only fuel continuously flows out:
Manual pump exhaust: Press the manual oil pump repeatedly (about 20-30 times) with moderate force to avoid excessive operation.
Connect transparent hose method: Connect a transparent hose to the exhaust port, insert the other end into the container, and observe the bubbles to determine if they have been completely drained.
Utilize fuel system pressure: Start the engine and idle, relying on system pressure to exhaust (but the idle time should not be too long to prevent wear and tear).

5. Complete exhaust
When there are no bubbles continuously flowing out of the fuel, quickly tighten the exhaust bolt to prevent air from entering again.
If the oil bolt was previously loosened, it also needs to be fully tightened.
6. Verify the effectiveness
Start the engine and observe if it starts smoothly and runs smoothly.
If it does not start within 10 seconds, repeat the exhaust steps.
Check for fuel leaks after starting.

Q: How often should I drain a diesel water separator?

Regarding the drainage frequency of the diesel water separator, the following suggestions are suggested:

Suggested drainage frequency

It is a common recommended practice to check and drain every 2000 kilometers of driving.
If the vehicle is frequently used or frequently driven in harsh environments such as humidity and dust, the inspection can be shortened to once every 1000-1500 kilometers.
Some models are equipped with transparent bases or electronic warning indicator lights, which can visually observe the water accumulation situation or indicate drainage through the dashboard. At this time, the actual water accumulation status should be taken as the standard, rather than strictly following the mileage.

Precautions

Do not wait until the accumulated water overflows before draining, otherwise moisture may enter the fuel system and corrode precision components such as fuel injectors and pumps.
When draining, clean containers should be used to collect water and avoid stirring up accumulated dirt.
If low-quality diesel (with high moisture and impurity content) is used for a long time, the frequency of drainage should be increased.
Regular drainage helps extend the lifespan of the fuel system and ensure stable engine operation.