isb 300 or rv 275 piston rings

[edmeyers]

i'm looking for the part number for the rings for these pistons
i ordered the rings for my engine cpl and forgot i had the 275 pistons dose anyone know the cummins part number for them.

tried to install the stock rings (as pictured in the FSM) but the middle ring won't fit in the piston.

the rings that came out of the pistons top and middle look the same, but the stock top is a keystone and middle is a one edge bevel.

and i threw away the ring boxes from the last build.

please help.

 

[GOT-Torque]

I think these are correct...

TOP #3940779
Keystone 2nd #3941384
Oil #3932520

Snedge should be able to get them for you...

 

[edmeyers]

thanks i called cummins today and they are supposed to have them there in the morning