|Posted: December 26 2006 at 17:53 | IP Logged
The transmissions in my 1984, 42’ DCMY are MG 502s and they’re mounted behind 8.2L Detroit Diesels. I haven’t been able to verify that they have the correct amount of oil.
After buying the Uni and without checking the level, I drained both transmissions using the plugs on the bottoms. I took out nearly a gallon – about 3½ pints from the starboard trans and nearly 4 pints from the port. With that equaling the amount they were said to hold, I put 3½ pints of oil into each. Then I noticed that they have oil coolers – something not mentioned in the manual.
The dipstick (which is about 10” long) is printed with the statement, “check oil with engine running and trans in neutral”. The manual says the same thing as does the plate on the transmission. When I did that, I found oil ¾ of the way up the stick instead of about and inch from the tip. I don’t understand the logic – with the engine stopped the level is way down near the FULL mark, which is near the bottom of the transmission. With the engine running the oil level is up near the top of the stick (and the top of the transmission). That seams backwards.
I removed 1 ½ pints of oil and the dip stick (engine running) showed the same; about ¾ of the way up the stick – no improvement! I adjusted both transmissions to the full mark with the engine stopped.
It appears I would have to just about drain the oil out to get the level down (with the engine running). That would mean I couldn’t change the oil because I can’t drain any more out.
Does anyone have any advice for me? How can I tell if I have the correct amount?
David M. Oates
42 Uniflite SE II, Adventure
San Francisco Bay Area