how to change transmission fluid on yanmar 3QM30(f)

[JBurans]

Hi all,
I have an 84 Hunter 37 c with a yanmar 3qm30 f diesel - how often should I change my transmission fluid and how often should it be checked? does it get pumped out of the sump where the dipstick is like the oil?
thanks,
Jim

 

[Mathurin]

You need to pump the oil out from the dipstick. The capacity is about 1.5L and you can use ATF multivehicule in there if I recall correctly. The owners manual says it should be changed every 100 hours.

 

[Ed Schenck]

Check the tag on the transmission. My 2QM tranny was a Kanzaki and used the same oil as the engine.

 

[sail_4_me]

I have a 1983 37c with the 3QM30F engine also. See attached picture of the transmission label.

Good post, I need to add this to my spring maintenance.

 

[Johnb]

I also have a 1983 37c with 3QM30F and it takes ATF (automatic transmission fluid). I don't believe brands make much difference but do believe in sticking to one brand. The first time I double changed with Penzoil Dexron 111 and have stuck with that.

The picture was from when I first got my boat, it is cleaner now......

 

[Ed Schenck]

Your transmissions are very different from my 1979. Obviously yours uses ATF as seen on the label. My label was on the side and said nothing about lubricant. When I sold the engine and tranny so went the manuals. I wanted to verify what it said about using regular motor oil. Other guys with "old" Cherubinis will vouch for it. And like John, my picture was taken before I owned it, during the survey.

 

[Jim Legere]

I changed the ATF oil in my transmission a few years ago because it had got quite dirty - more brown than red (and its probably time again - thanks for the reminder!) Anyway, I used Dexron II. I found a drain plug somewhere on the bottom and managed to fit a drain pan cut from an old Tide liquid detergent container underneath. As I recall, it was less hassle than changing the engine oil. I would love to be able to drain the engine sump from below!