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Old 06-05-2015, 20:28   #31
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Re: Volvo Penta MSB

Quote:
Originally Posted by michaeltayar View Post
Hey,

Transmission on my md7 is completely dry. Any ideas?
Someone mentioned a drain plug? Can't see any!

Thanks,
Michael


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How did you get under yours?

Place your hand over the bottom of the housing. You will find a nut ... or not!

But there is a nut there on our execution (around 1980).

b.
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Old 07-05-2015, 16:15   #32
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Re: Volvo Penta MSB

As mentioned, there is a drain plug in the center section of the transmission, and as I recall also an oil drain plug in the rear planetary section of the transmission. Check them.

Fill the transmission to the proper level using the dipstick, then place an oil pad under the casing to see if you can find out where the oil is going. If the oil level is dropping you should be able to see where the leak is coming from.

If the level is dropping, but there are no obvious external leaks, there is another possibility. Located in the front end of the input shaft is an aluminum plug with an O ring which prevents oil leaking past the needle bearings and out of the transmission. You can see this plug in the photo attached to this thread. If this plug/Oring is damaged you could be leaking oil there and it would disappear into the engine crankcase without being seen.


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Old 14-05-2015, 10:53   #33
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Re: Volvo Penta MSB

Thank you Doug for your reply.
Found bottom bolt and replaced oring which seems to help. Also unscrewed bolt on starboard side at 4 o'clock but it's completely dry and missing oring. Will replace it.
After checking dipstick, lubricant is still in tranny but some did leak, around 0.5 ounce.

Also forgot to mention that oil splatters when gear is engaged.

Couldn't find ring you mentioned. Attached pic did not load.

Thanks again,
Michael


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Old 14-05-2015, 18:57   #34
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Re: Volvo Penta MSB

The plug w/o ring is found on the front of the transmission. It can't be seen unless the trans is removed from the engine. You can see it in the photo in the second or third post of this thread.

Top up the oil in the box and see if you can find where the oil is leaking from with an oil pad laid in the bilge.

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