pete.miller77 Posted February 16, 2022 Share Posted February 16, 2022 I need to remove the 1/4" governor air hose on my Haldex Pure Air Plus air dryer, with the engine running, to see if my air dryer air leak stops. I'll have 20 ton jackstands under the rear frame. The transmission will remain in neutral. Can I get in trouble doing this carefully? 1 Link to comment Share on other sites More sharing options...
waterskier_1 Posted February 16, 2022 Share Posted February 16, 2022 I have started my engine while on the built in hydraulic jacks many times. There should be no mechanical problem in doing so. As far the safety of working on the air governor while the engine is running, I'll let someone with more experience in that area answer. Link to comment Share on other sites More sharing options...
Rick A Posted February 16, 2022 Share Posted February 16, 2022 I think working on the air governor while it’s running is a good idea. I’m not familiar with this unit, but unintended consequence are just that. Why not work on it, then test for leaks after the repair is done? That’s my 2 cents. Link to comment Share on other sites More sharing options...
D.Ellison Posted February 17, 2022 Share Posted February 17, 2022 what about plugging into shop air , then its quiet to hear the leaks and safer 2 Link to comment Share on other sites More sharing options...
dl_racing427 Posted February 18, 2022 Share Posted February 18, 2022 As long as the parking brake is set, and the tranny is in neutral, you should be relatively safe. If you can get the tires off the ground, it would eliminate any chance of the rig driving off the jacks, but I think that risk is minimal. Just stay away from the driveshaft in case it moves, and any other rotating parts. I'm very glad to see you're using proper jack stands. The biggest risk is a failure in the jack system, so you have that covered. 😎 Link to comment Share on other sites More sharing options...
waterskier_1 Posted February 18, 2022 Share Posted February 18, 2022 2 hours ago, dl_racing427 said: As long as the parking brake is set, and the tranny is in neutral, you should be relatively safe. If you can get the tires off the ground, it would eliminate any chance of the rig driving off the jacks, but I think that risk is minimal. Just stay away from the driveshaft in case it moves, and any other rotating parts. I'm very glad to see you're using proper jack stands. The biggest risk is a failure in the jack system, so you have that covered. 😎 If you take the tires off the ground, you no longer have the parking brake. 2 Link to comment Share on other sites More sharing options...
dl_racing427 Posted February 18, 2022 Share Posted February 18, 2022 4 hours ago, waterskier_1 said: If you take the tires off the ground, you no longer have the parking brake. True, but you also no longer have the possibility of it powering itself off the jackstands if it goes into gear. Link to comment Share on other sites More sharing options...
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