4DR7 Diesel Engine ME021861 Piston

PISTON TYPES

Piston skirt and crown

Consist of a steel piston head and an aluminium piston skirt which have a moveable connection to each other via the piston pin. Due to great strength and low wear and tear, it is possible to achieve low exhaust emission values for diesel engines that are subjected to particularly high loads.

Piston comes with bushes
In order to make it possible to increase the loads to which the pin boss can be subjected, this piston has pin boss bushes that are made of a special material

Alfin Pistons
Alfin is inserted within the ring grooves when casting. Alfin is made of special austenitic cast iron. It is tightly bonded metallically to piston body and counteracts the wear in the top or second ring groove.

Cooling channel piston
Cooling channel piston effectively reduce piston body working and groove land temperature under high temperature working condition.

PISTON SURFACE TREATMENT

Piston with Tin coating
Tin is coated by exectroanalysis or heat dipping at thickness between 0.001 and 0.003mm. Tin is characterized as soft and oil-friendly which improves running-in efficiency of piston and liner.

Pistons with Phosphating
The phosphating is aimed to improve initial running-in performance. The phosphating layer is easy to wear off and helpful to improve running-in.

Piston roof anodizing
The piston roof is anodized by electrobath, forming thin layer of Al O . This treatment will improve heat resistance, heat conductivity and anticorrosion, it helps prevent piston roof burn-up. 

Graphipe printing and spratyed at piston skirt
Graphite is characterized as good lubricating, which helps lubricant adhering to coating surface.

4DR7 Engine Piston

4DR7 Related Products

—— Guangzhou Hdparts co.,ltd is a private enterprise which been built in 1995, located in the engineering machinery parts distribution center in Guangzhou, for the south of city center, convenient transportation.

—— We have got the approval and trust of many overseas companies . Relying on the continuous supports and sincere suggestions from domestic and overseas customers.

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—— if you have any questions or needs,pls contact our salesperson who have been in the trade for many years.

—— We manufacture many kinds of diesel engine parts and also import genuine parts from other factories to ensure you get the best price with a fast, efficient delivery. 

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——For the long term domestic and foreign merchants to provide a wide range of excavator engine parts.

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