Eagles International Forum

How much oil does a miter box on a 6v92 really need? My book says 3 qts. I put in 2.5 and it ran out past all 3 shaft seals.

Read my post on the MAK board

http://www.busconversions.com/bbs/index ... ic=33045.0

Thanks,
David

David Isn't there a plug in the side of the box that tells you when the level is correct ? I don't have the stock miter box but my box is set up that way and most all boxes I have seen are that way or have a dipstick or sight glass.

Wayne

I have a dipstick, but it has no index marks. The 3qt fill instruction came from the eagle manual.

David

On the issue of the oil level, your dipstick should be marked, if it is not, it is broken off short, or a replacement from something else. I pulled the dipsticks on my 8V71 & 6V92, both are marked in different ways. The 6V92 looks like it is a die cast piece, it has a oil level line cast into the metal about 1/4" from the bottom. The shaft is 5" long from the tip to the beginning of the threads on the cap, which also acts as a vent. It screws into the top of the box. The 8V71 version looks similar to the 8V92 pictured in the manual. It sits in a riser tube up from the box and is solid metal with two notches on either side that are 1 1/2" from the tip. The blade is 6 1/2" long from the tip to the edge of the top cap. The Eagle part number for the 6V92 is 104-0730-531, and the 8V92 is 054-0730-027. Unfortunately, we can't call Eagle to get that part anymore, or Jefferson Bus & Truck. Depending on which type you have, you should be able to make one out of some other dipstick that is long enough to be cut down. (I posted this on the other board as well).

Had same problem with my 05, wrong dipstick. Filled to proper leval and
leaked out rear seal, replaced seal all is well. Good luck Bob

My dipstick is about 5" long but snaps down over a lip at the top of the dip tube, no screwing down available. The stick has no markings. When I put 2.5 qts oil in, it was almost to the top of the dipstik. I think 3 qts would almost make to the filler neck. That seems too full to me. When I checked the level before draining it was slightly above the bottom end of the stick. About 3/4 quart was drained to waste. My box has been running like this for several thousand miles. After I get the new seals in I will index the stick with "one qt", "two qt" and see how high it is on the stick.

Are any of you eagle guys running 3 qts in a 6v92 box??

David

I think there is a good chance that when you checked it with just a little showing on the stick, that was the correct level if the stick protrudes 5" from the top of the case. If the dipstick is resting in a riser that sticks up from the case, your level is probably too high. Maybe Eagle had more than one supplier for the 6V92 box, or you have a miter box that is from an eight cylinder (if that is possible). My 1984 6V92 definitely has a threaded cap with the dipstick attached. Maybe the original dipstick was lost and someone improvised. In any event, it looks like the oil level is about 4 3/4" below the top of the box. The listed capacity might be for a dry box, and when you drain it, not all of it comes out. I would go by the level, not the listed capacity. The seals can only handle so much. If you do not have the correct dipstick with the built-in vent, you will have to have one as a separate item like on 8V71 miters. An un-vented box will push oil past the seals sooner or later.

I finally got all this back together and have a duplicate thread on BCM. Instead of me reposting everything here is the link if anyone thinks it may be helpful.

http://www.busconversions.com/bbs/index ... ic=33045.0

David