Cummins 3696971F 5257526F Piston Cooling Nozzle

Details

This Cummins piston cooling nozzle, model 3696971F/5257526F, is compatible with Cummins M11 and QSM11 electronic fuel injection engines. These Cummins nozzles are made of stainless steel or high-temperature alloys, with some models featuring a ceramic coating. They precisely cool the bottom of the piston through high-pressure oil injection, effectively preventing thermal deformation or nozzle cap melting. The Cummins piston cooling nozzles represented by 3696971F and 5257526F, though small components, play a crucial role in protecting the health of the engine's "heart." They are a microcosm of Cummins' design philosophy of engine durability and high efficiency. Whether for repair or maintenance, choosing the correct genuine cooling nozzle is a fundamental investment to ensure the long-term reliable operation of your equipment.

Product Images

Product Parameters

Parameter Category	Detailed Description
Part number	3696971F
Nozzle hole diameter	0.1205 inches to 0.1235 inches
fuel injection rate	4 - 6 Kg/KW·h
jet speed	Greater than the piston's instantaneous maximum speed
Turn on pressure	Typical value 120 - 160 kPa

Product Advantages

The cummins piston cooling nozzle, through its valve structure such as a flow-limiting valve and a dual-hole design, can automatically adjust the cooling oil flow based on oil temperature or engine load. It provides cooling when needed and reduces unnecessary oil injection under low load, helping to balance cooling effect and oil consumption. It can also accurately spray oil to key parts of the piston, ensuring sufficient cooling of the piston top and carrying lubricating oil to friction pairs such as the piston pin, thereby effectively controlling piston temperature, reducing wear, and improving engine reliability and safety.

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FAQ

Q:1. Which engine models are compatible with Cummins piston cooling nozzles 3696971F and 5257526F?

A: The 3696971F is compatible with Cummins M11 series construction machinery engines, featuring a high-pressure injection design suitable for high-temperature, high-load conditions.

Q: 2. What are the materials and temperature resistance of these two nozzles?

A: Material: Both are made of stainless steel or high-temperature alloys; some models have a ceramic coating for excellent wear resistance. Temperature range: -40℃ to 300℃, suitable for harsh environments such as mines and construction sites.

Q: 3. What are the injection pressures of 3696971F and 5257526F?

A: Both are compatible with Cummins high-pressure common rail systems, with injection pressures up to 1600 bar, ensuring precise cooling of the piston bottom.

Q: 4. What precautions should be taken when installing and maintaining these nozzles?

A:It is recommended to check the nozzles for blockage or wear every 15,000 hours.

Q: 5. What are the international packaging standards for Cummins piston cooling nozzles?

A:Rust-proof and shockproof corrugated cardboard boxes or wooden frames are required, with standard pallet dimensions (120 cm × 100 cm).

Q: 6. What are the tariff policies for exports to the US or EU?

A: For the US, it depends on the latest US tariff information. For EU specific tariffs, please consult the Harmonized System (HS) or visit the customs website for confirmation.

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