Air leak detector

[cmillsap]

(04-03-2015 00:22)csprenger Wrote:  

(04-02-2015 19:25)cmillsap Wrote:  Yeah, I have one too. They can be tricky to use. The best way I have found is to fill the air system and turn off the compressor then check for leaks as the system pressure bleeds down. If you try to use it when the compressor is on, the air rush through the lines and fittings will produce a false reading. Otherwise, mine works pretty well. Once it finds a leak, I still confirm it with soap & water.

Chuck, do you have the unit with the metal probe? Mine is before the probe. But I do have an HorFrt unit with probe. Agree, air pressure up, then enabled...use the rubber tube(s) to detect air leak(s)...then the antenna touching the lines, parts, etc. in the same area...have detected leaks a few times. Nothing major or needing attention.

I HATE AIR LEAKS!!! My buddy tells me to be happy with the state air leak down specs for the brakes. The rest...up to us to be frustrated, or not.

Hi Curt,

The metal probe was an option on my unit which I don't have. I agree with your buddy. It is a constant work in progress. My brake air system is tight and will stay pressurized for many days. The rear suspension will slowly drop to the bump stops over a few hours but the front air springs will stay fully inflated for days. The weight of the engine and batteries at the rear probably causes this.

The accessories air system for the step, slide seal, dump valves, driver's seat, toilet and etc. will drop to zero in about an hour. I have replaced several fittings and lines to keep the leaks to a minimum. So it is a constant battle as most leaks happen in the accessories air system. There are so many fitting in that system that a small leak on a few of them will deplete the system pretty quickly. The DOT fittings aren't cheap either.