Brake Booster Lubrication

Reply Subscribe

Thread Tools

Search this Thread

Jan 19, 2014 | 07:24 AM

m350

Thread Starter

Posting Guru

Joined: Jan 2003

Posts: 2,181

Likes: 3

From: Eastern CT.

Brake Booster Lubrication

Hey all, Just Installed a rebuilt Brake Booster(frame mount) on my 83' F-700, and the Instructions say to "Lubricate the Booster" with the Specified oil and amount, But did not see any info on it or where to add it to the Booster ?
Anyone that has some info on this would be helpful, thanks,,Mark

Jan 20, 2014 | 03:16 PM

85e150

Super Moderator

Joined: Apr 2004

Posts: 34,495

Likes: 2,810

What oil and what amount did they specifiy?

I find a couple references for older hydrovacs with leather seals.

Oil in Hydrovac - Binder Planet Forums

How Do You Lubricate a Hydrovac?

There are pics in those links showing the oil fill hole, you gotta dig a bit but they are there.

Jan 24, 2014 | 06:04 PM

m350

Thread Starter

Posting Guru

Joined: Jan 2003

Posts: 2,181

Likes: 3

From: Eastern CT.

Thanks for the info, after reading more about them, some have the fill ports, some don't(mine does not have the plug) As I read the info the Boosters that need the oil (older units)have leather cup/diaphragm in them that need to stay supple.

Newer units have no plugs, need no lubricant for there rubber cup/diaphragm .
I can see rubber where the Booster bolts together but don't know if any leather is in side.

The info/direction sheet that came with the Booster showed separating the lower vacuum hose and squirting the 1-2 oz of oil in towards the Large Diaphragm, but did not specify what brand or type of oil to use., Mark