BAC Forum

General Boards => Technical Support => Topic started by: David Fischer on December 07, 2012, 10:27:51 PM

Title: Hydraulic Fluid
Post by: David Fischer on December 07, 2012, 10:27:51 PM

I have a C12 Cat engine and the  hydraulic  fluid is showing a little low and I used up my old bottle of fluid and thru out the bottle.  Just some conformation from anyone would help.  It seemed I used Dextron transmission fluid for the hydraulic tank, but not too sure.  It sounds silly, but I just want to be sure.  

Title: Re: Hydraulic Fluid
Post by: Bill Sprague on December 08, 2012, 12:14:58 AM

My Beaver Lubrication book specifies Dextron III.  I don't know what the III is about.

Title: Re: Hydraulic Fluid
Post by: Gerald Farris on December 08, 2012, 12:17:45 AM

David,
The 1997 Marquis used Dextron III transmission fluid in the hydraulic system. If you change the hydraulic fluid in your system when replacing the hydraulic filter, you may want to consider changing it over to TranSyn instead of the Dextron III. TranSyn is more expensive, however it lubricates better and is more heat tolerant than Dextron III.

Gerald  

Title: Re: Hydraulic Fluid
Post by: Richard And Babs Ames on December 10, 2012, 01:24:08 AM

You also do not have to flush out the system as Transynd and Dextron III are compatible.

Title: Re: Hydraulic Fluid
Post by: David Fischer on December 11, 2012, 01:42:53 AM

Thank you all for your help.  I have never changed the Hydraulic fluid in the coach so I will have to look up in the Gillig book as to how to do it.