[C320-list] Transmission oil change

[JJ Morrison]

Those of you changing the tranny oil once a year are engaging in unnecessary time and effort. The engine manual calls for a transmission oil change every 150hr, unless the engine is new then after the first 50hr and every 150hr after that. There is really no advantage to changing lubricants more often than the manufacturer's recommendation; unless of course the lubricant has become contaminated somehow. The recommended lubricant for the transmission is SAE30 engine oil.cheersJohnM1999#574

> Date: Fri, 15 Apr 2016 12:39:20 -0400
> From: martinlrosenberg at gmail.com
> To: C320-List at catalina320.com
> Subject: Re: [C320-list] Transmission oil change
> 
> Over the years, Yanmar has changed the spec for engine lube between 30W and
> 15W40 but has never varied from 30W for the trans. I used to find it easier
> when I only had to store one weight but I personally believe that the 15W40
> is better for the engine.
> Martin Rosenberg
> 
> On Thu, Apr 14, 2016 at 4:36 PM, Daryl Hunt <drhunt at rochester.rr.com> wrote:
> 
> > I'm about to change the transmission gear oil on my Yanmar 3GM30F (Japan)
> > diesel.  I changed the crankcase oil before haulout last fall with Shell
> > Rotella T 15W40.  The Yanmar Operators Manual says to use the same oil for
> > the gear case as the crankcase.  However, my PO left a quart of CD 30 oil
> > labeled "For Transmission" and a Yanmar (Japan) manual "Maintenance of
> > Pleasureboat Diesel Engine - GM Series" aboard specifies CD 10W15 for
> > engine and CD 30 for gear oil.  Since Believe's engine is the Japan
> > version, I'm leaning toward the CD 30 oil.   Make sense?
> > --
> > /fair winds,//
> > //Daryl Hunt//
> > //C320 #660 "Believe"//
> > //Rochester, NY - Lake Ontario /
> >
> >
> > ---
> > This email has been checked for viruses by Avast antivirus software.
> > https://www.avast.com/antivirus
> >