I can't seem to find the air purge valve on this dump truck. The moisture gets so bad I have to drain the tanks 2-3 times a day. 130k miles on it for an 87 model is super low but it sat for 10 years inside a building. I picked up a sl1200 dryer and wondering if that will actually help the situation even though I cant seem to find install instructions lol.
87 357 air purge valve
Discussion in 'Peterbilt Forum' started by BigRig1980, Apr 10, 2020.
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