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  • Bosch VP44 Injection Pump Diaphragm?

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    Just to kill off the whole Bosch VP44 diaphragm failures and voiding of warranties. This diaphragm is out of a Revision 027 pump. As you'll see it's a harden steel plate with plastic on the inside holding a o-ring seal. 


    Here is the inside of the diaphragm and the o-ring seal.



    This is the top cover of the diaphragm. This steel plate is harden steel and held in place with a snap ring. 




    Looking through the hole and you can see the plastic and steel sandwich.



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