Delivery valve shims

[dodge ram truck]

One of my delivery valve's shims broke. Where do I get new ones? What are they for? How do you know how thick they should be?
Thanks

 

[LReiff]

You'll need to measure the thickness with a mic/caliper etc. Your best bet for getting the right part will be a pump shop. You'll want to be sure the replacement is hardened steel like the original which a genuine Bosch part will be.

 

[Smokem]

Let me know how thick you need, just about threw a bunch away Friday.