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520lxi - Transaxle fluid change problem

6151 Views 10 Replies 4 Participants Last post by  phred42
Hi all, newcomer to the forum...

I recently acquired my first WH (came with the house), and love it. I just performed my first round of basic maintenance on it, and everything went well except changing the transaxle fluid.

Drained the oil, no problem. Changed the filter, it put up a fight but I won (a large hose runs diagonally across the filter, so you can't grip it from any angle, hard to even get a filter wrench on it). Putting the oil back in, here I have a problem. The first pint or so went right in. The next pint went in slower as air bubbled out past it, but went in at a reasonable pace. The next few pints trickled in over half an hour or so (each).

Now, I have less than half of the 4.5qts in it, and can't get any more oil to go in. Half a pint has sat in the funnel overnight, and shows no signs of taking any more. I suspect I somehow need to bleed out the air trapped in the transaxle, but see no way to do this. :banghead3

Any advice for a newbie?

Also, I have no intention of selling it, but just as a ballpark figure, how much would it cost to replace this thing? A fairly old (10+ years?) 520lxi, with ~300 hours on it... Basically, if something major breaks on it (I in no way claim myself as a skilled mechanic, as you can probably tell from my question :eek: ), should I bother having it fixed, or just plan on replacing it?

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Come on, guys! I know you all are smarter than that! Here's the fix. Remove one of the two fender/seat mounting bolts on top of the cast housing. These two bolts screw straight down into the rearend housing and go through the top of the case and into the gear area. This will let the air out as the oil runs in thru the dip stick tube. Simple! Just make sure you clean around the bolt before you remove it, so you don't get dirt in through the threaded hole and into the fresh oil. I had the same problem when I changed the oil in one of my first Wheel Horses, almost 40 years ago. I'm hooked on those red machines. They are the best! There's no competition.
The seat, fender pan & gas tank all mount to a steel frame that mounts to the top of the rearend casting, unless you have one of those vertical crankshaft model tractors with a different type of tranny. I know absolutely nothing about those models. Never had one. If you have a Unidrive rearend, there is two 3/8" bolts in the top/center of the casting. They will vent the air out as the oil goes in. You can't see them with the fender pan in place.
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