NHC250 Emergency Fuel Shutoff Valve: M809, M939, M939A1

MyothersanM1 · Jan 24, 2013

The emergency engine shutdown brass fuel valve had been leaking when under load on my truck and I finally got around to replacing it. Thanks to Cummins guru Will Wagner I was able to easily obtain, and at a decent nominal price, the valve. It appears to a better design than the original valve.
A very simple fix, it required about 10 mins. I used a 1/2" (fuel line), 5/8" (valve body), 7/16" (pull wire bolt) wrenches and a crescent wrench for removing the tachometer cable.

Here's a pic of the box for part number reference.

wsucougarx · Jan 24, 2013

What did you find it for and where? I'd like to get a couple extra ones. The cheapest I have found is $45 each.

MyothersanM1 · Jan 24, 2013

I had Will Wagner order through Cummins. I paid more than you did, though. I did a little looking around, but found the prices outrageous ($200+). So I just had Will track it down for me. I guess I should be asking you where you got yours from. Some extras would be a smart move.

wsucougarx · Jan 24, 2013

$43 at Eriks
http://www.eriksmilitarysurplus.com/fucova24vofo.html

MyothersanM1 · Jan 24, 2013

wsucougarx said:
$43 at Eriks

wsucougarx said:
http://www.eriksmilitarysurplus.com/fucova24vofo.html

The electric solenoid is good to go. All I replaced was the brass valve above the solenoid that is connected to the emergency engine stop pull handle in the cab. It had been leaking from the valve stem. This a specific valve not available through hardware outlets.

bigwhale · Sep 7, 2013

I need one of these valves also, the valve seems to be stuck half way closed and the truck doesn't respond quickly when pressing on throttle and idles low. When I pull the cable the engine does not shut down.

m16ty · Sep 8, 2013

You can just do away with the valve if you like. You won't have an emergency shutoff but most civilian Cummins engines don't have the valve.

bigwhale · Sep 9, 2013

Took valve off the engine and opened it up and cleaned the guts . The brass actuator inside was tight I guess from sitting. Relined the holes , sprayed wd40 inside to clean it and reinstalled the old valve on the engine. Old valve works like a charm with no leaks, alittle cleaning goes along way and is easier on the wallet also. Just be careful lots of tiny parts and a very small o ring.

NHC250 Emergency Fuel Shutoff Valve: M809, M939, M939A1

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