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| | | | Joined: Mar 2010 Posts: 79 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2010 Posts: 79 | Hi all,
I just installed a rebuilt hydrovac on my 48 2 ton from my local NAPA.I understand you have to put some kind of oil in the booster.What kind of oil and where on the unit do you put it in?I got no instructions with the unit.Also what kind of oil do you run in the brake system itself (master cylinder and lines?) I have new brake lines a rebuilt master cylinder and wheel cylinders.
Thanks!!
JMH | | | | | Joined: Apr 2005 Posts: 1,107 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 1,107 | when i rebuilt mine i put about a ounce of hyd jack oil in the little plug that that is on the back side of the can. i use dot 3 brake fluid on all my stuff for keeping everything standardized. | | | | | Joined: Mar 2010 Posts: 79 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2010 Posts: 79 | I read another post that also recommended hyd. jack oil (Permatex brand)so Ill go with that and use regular dot3 for thr system. Thanks for the tip.
JMH | | | | | Joined: Dec 2006 Posts: 720 'Bolter | | 'Bolter Joined: Dec 2006 Posts: 720 | When mounted the small plug on the end of the can should be on the bottom side. I used Marvel Mystery Oil air tool oil and it's been working fine with the old leather seals. The spount on the bottle made it easy to put in that little hole. the shop manuals call for half an once, but I'm betting it'll drain back out of the hole before you could overfill it.
1956 GMC 370 dump " 'Tater "1970 VW Volksrod "the Black Bomber" 2007 Chevy Avalanche 2020 Jeep Cherokee Trailhawk, 2005 Harley Davidson FLHTCUI I dig all cars, old and new, whether they were hammered out of American iron, German steel, or Japanese tin cans. Being unable to appreciate them all is missing out on a world of great things.
But thats just MY opinion! :P
| | | | | Joined: Mar 2010 Posts: 79 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2010 Posts: 79 | Question,
Does anyone know if the shops that rebuild these Hydrovacs use the origional leather diaphram or a newer synthetic material.(rubber,nylon etc...)?
JMH | | | | | Joined: Feb 2006 Posts: 1,867 Shop Shark | | Shop Shark Joined: Feb 2006 Posts: 1,867 | Shops typically use new rubber seals.
Whatever your choice of oil, you do want to go for a non-petroleum based lubricant.
Jeff | | |
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