NHC 250 part identification

[162tcat]

First, I looked in the TM and I'm not saying it isn't there, but I didn't find it.
This is in the return line on the NHC 250 and I've never seen it on the older PT engines I've worked on. What is it and what's it's purpose?

Thanks in advance

 

[wrenchturner6238]

I have not taken mine apart to check it out but we had the same kind of thing on the VT 1710 Cummings and it was a check valve

 

[WillWagner]

It's a check valve. Should be a 2 psi valve, sometimes they were put in the outlet line to prevent drainback if there ewas a pump issue someone couldn't figure out. Normally found in the suction line before a fuel pump. I can find a p/n if you like.

 

[WillWagner]

I have not taken mine apart to check it out but we had the same kind of thing on the VT 1710 Cummins and it was a check valve

Fixed it for ya!

 

[162tcat]

Thanks for the info, Will. Mine is in the return line from the head between the head and the PT pump/return to tank line. I have an slight air issue I've been trying to find so I'm working my way through the system.

 

[jonesal]

The check valve is part of the Fuel Tank Ventilation Kit MWO 9-2320-272-20-6. The pdf for that MWO is out there if you want the particulars on it. The check valve is PN 12301495, 4820-01-317-8227.

Al Jones

 

[162tcat]

I'll look it up, good info. Thanks