Delivery valves

[fasttalker83]

Ok I have a P-pump off of a perkins diesel tractor motor and on top of the delivery valve there are 2 numbers one is 112 and the other is 202 I was wanting what number do you look at you know like 191 valves well which number is the right one the top or the bottom one if anyone knows this it would be of some great help

[KTA]

The 202 is the commonly refrenced number. Those are good valves.

[fasttalker83]

ok now heres the fun thing I took out the delivery valves in the pump that came off the pump and they look nothing like the ones in my truck and the delivery valves that have 202 on them are much smaller than mine in my truck which are 181's KTA what P-pump runs a smaller deliver valve than the trucks but still has 202 on them there like a third of the size and what the hell is in my bus motor it has a long stem on it and the outer peice just has an S on it ???? lost me