Vintage iron
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I have been maintaining customer's M939 series trucks for a few years now and I am stating to see a lot of valve, check valve failures. The cause? None functional air dyers or poor operating dyers. I have been replacing the whole unit with new ones, but this time I used a Purest air dyer from Supreman in Ct.
Man, these are some nice units. The size, ports and hook ups are all the same. It just needed three holes in the original frame bracket. I had it on in not time. The PURest dyer works awesome! I think the truck even builds air quicker. I am going to put them on all the trucks now.
Man, these are some nice units. The size, ports and hook ups are all the same. It just needed three holes in the original frame bracket. I had it on in not time. The PURest dyer works awesome! I think the truck even builds air quicker. I am going to put them on all the trucks now.
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