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| | | | Joined: Feb 2009 Posts: 128 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2009 Posts: 128 | I am filling my new brake lines and master cylinder with fluid and I was wondering if I need the engine running to bleed the brakes? It has a hydrovac brake boost and I didn't know if the boost aided in bleeding the brakes while the engine is running or if I simply pump the brakes with the engine cold. Thanks.
1946 2 Ton Flatbed
| | | | | Joined: Jun 2009 Posts: 2,201 Shop Shark | | Shop Shark Joined: Jun 2009 Posts: 2,201 | It shouldn't matter. the booster just makes braking easier for the driver it doesn't change the mechanics of it all. | | | | | Joined: Apr 2010 Posts: 160 'Bolter | | 'Bolter Joined: Apr 2010 Posts: 160 |
Just a heads up there should be at least one bleeder on the hydro vac sometimes two.
| | | | | Joined: Feb 2009 Posts: 128 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2009 Posts: 128 | Thanks guys! I will keep an eye out for the bleed screws on the hydrovac...
1946 2 Ton Flatbed
| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | In newer trucks (Advance-Design years) the bleeding procedure for a hydrovac system is different from the bleeding procedure for a standard system. But, I do not think that the engine has to be running to bleed a hydrovac system . | | | | | Joined: Apr 2005 Posts: 1,107 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 1,107 | I do not think that the engine has to be running. no, it doesnt have to be running. while your bleeding to check the health of your hydravac disconnect the vac. line off the can. if brake fluid runs out then its leaking. | | | | | Joined: Feb 2009 Posts: 128 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2009 Posts: 128 | Thanks for the hydrovac bleed tip Tim! I'm working on them today.
1946 2 Ton Flatbed
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