M35A3 fuel tank check valve/ commercial option?

[guns1977]

My check valve is non functional, is there a commercial available option for one? I have done some searching but did not find a definate answer.
Thanks

 

[doghead]

What is the nsn? Either google it or look for it on parttarget to fin manufacturers.

 

[guns1977]

4820014089958 is the nsn I could find. It says its 1/2 npft I was hoping to find a Napa or .... Cross number, they dont offer a fuel line check valve in a 1/2 thread size. That I could find

 

[doghead]

Looks like a military only item. http://www.parttarget.com/4820-01-4...90.html/-E1EEB0F0-22ED-4DB6-8045-8CC528D9FBF0

 

[rustystud]

Ask and you shall receive.


View attachment Scan0173.pdfView attachment Scan0174.pdf

 

[guns1977]

Thanks, I was hopful for one commercially available like that.

 

[snowtrac nome]

try a plumbing and heating store those are used in fuel fired boiler applications I could go to our local hardware store and get one right now for about 10 bucks.

 

[rustystud]

try a plumbing and heating store those are used in fuel fired boiler applications I could go to our local hardware store and get one right now for about 10 bucks.

Post a picture or price sheet for us to see.

 

[Scar59]

Ask and you shall receive.


View attachment 666326View attachment 666327

Good info, Thanks Rusty.
The inoperative valve can be cleaned w/ a little carb cleaner, work the check valve , re-install. Good to go.

 

[Eliteweapons]

I used this type. Mine had fallen apart so I replace it.

Compact Backflow-Prevention Valve


for Oil and Fuel, 1/2 NPT Female x 1/2 NPT Male

Each








In stock
$17.78 Each

7768K64

Valve Function	Backflow Prevention
For Use With	Diesel Fuel, Gasoline, Oil
Activation	Pressure Driven
Connection Type	Pipe × Pipe
Connection	Threaded NPT Female Inlet × Threaded NPT Male Outlet
Pipe Size	1/2 × 1/2
Maximum Pressure	500 psi @ 70° F
Min Opening Pressure	1 psi
Temperature Range	-20° to 180° F
Shape	Straight
End-to-End Length	2 1/8"
Mounting Orientation	Any Position
Material
Body	Brass
Seal	Fluoroelastomer
Valve Type	Check
Check Valve Type	Spring Loaded
Flow Coefficient (Cv)	2.4

Often installed in confined spaces, these valves have a shorter end-to-end length than standard backflow-prevention valves. They open to allow flow in one direction and close when flow stops or reverses.

 

[peashooter]

Ah, Mcmaster.... my favorite store!

 

[1 Patriot-of-many]

I'll be ****ed an easy fix for once. Hadn't started my M35A3 in month or more, had one dead battery that wouldn't come back. Replaced it. Started truck up and it promptly died when trying the get the rpms up to inflate the tires...... Took the check valve off, filled it up with carb cleaner worked the ball, filled it the opposite way, let it sit and worked it, put it back on, started right up!!!!! Didn't even change the fuel filter, though I bought one and the water.fuel separator. Like McDonalds, I'm loving it!

 

[tobyS]

Don't forget to watch the pressure requirement to open the valve. It's pushing against a spring in most checks.