Slow air pressure build

hogi6123 · July 05, 2021, 02:00:31 PM

Do you know if it's input or outlet valve that's stuck open?

Jsrcaptain · July 05, 2021, 03:50:33 PM

I'm pretty sure it's the intake. I took the hose fitting plate off and ran the engine. I'm getting a blast of air from the aft valve. The unloader is moving freely. Something is holding the valve open. I'll take the unloader out, blast some air in there while I'm pushing the valve open. I wish I had a boroscope. Hard to see in there. If that doesn't work it's off with the head!

dtcerrato · July 05, 2021, 05:22:53 PM

Quote from: hogi6123 on July 05, 2021, 01:59:24 PM
Edited
Just have to figure out how to store the coolant and get it back in.

Good point. That's why we always carry two 5 gal. Buckets and a 5 gal. Oil drain pan. Has come in handy on needed occasions...

buswarrior · July 06, 2021, 06:13:49 AM

Just spit balling... have you confirmed the air supply hose isn't collapsing inside from the suction?

I hate using tools...

Happy coaching!
Buswarrior

Jsrcaptain · July 06, 2021, 10:20:58 AM

New hose. Doesn't work with the hose off.

Does anyone know if the head kits for the TF500 through TF700 are the same? I have a TF600.

hogi6123 · July 06, 2021, 10:50:18 AM

According to these web pages, they are the same, but you can't believe everything on the Internet.

https://www.amazon.com/gp/product/B00KH540K4

https://www.ebay.com/itm/Parts-for-Bendix-500-700-1000-Tu-Flo-Air-Compressor-Head-Set-Gasket-kit-NEW-/272167157698

Jsrcaptain · July 06, 2021, 03:19:44 PM

Thanks. At least with Amazon, you can usually return stuff easily.