M818 poppet valve leaking air

[gpp111]

The poppet valve on my M818 is leaking air, can not build air pressure. What needs to be done to correct this?

 

[Floridianson]

Myself I would replace the transfer case air piston preformed packing. There is right up about it.https://www.steelsoldiers.com/showt...Air-leak&highlight=transfer+case+air+cylinder
Post #4 starts my post but read the whole thread.

 

[Scrounger]

After awhile the O-rings wear out. To repair them is just a simple remove and replace with new O-rings. Coat the new O-rings with air tool oil before reinstalling them.

For a “quick” fix. After starting the engine, depress the clutch and move the transmission into first or reverse. There should be a sweet spot where it will stop leaking. Hold the shift lever in the sweet spot till the air builds up fully. Once the air pressure has built up, move the transmission into neutral. Often, once the air pressure has built up and the truck has warmed up the O-ring will stop leaking. The leaking O-ring will still have to be replaced, they don’t get any better.

 

[gpp111]

Any idea where I can get new o rings?

thanks

After awhile the O-rings wear out. To repair them is just a simple remove and replace with new O-rings. Coat the new O-rings with air tool oil before reinstalling them.

For a “quick” fix. After starting the engine, depress the clutch and move the transmission into first or reverse. There should be a sweet spot where it will stop leaking. Hold the shift lever in the sweet spot till the air builds up fully. Once the air pressure has built up, move the transmission into neutral. Often, once the air pressure has built up and the truck has warmed up the O-ring will stop leaking. The leaking O-ring will still have to be replaced, they don’t get any better.

 

[gpp111]

found the gaskets at Memphis supply, appreciate the heads up.