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Repack transaxle with grease?

2

257 Roberts

Member
Hey guys. I'm getting my two Murray riding mowers ready for the mowing season, a 1990 12hp/38" and a 1996 8hp/30". Both have five speed transaxles and I think its time they got some new grease. Any suggestions on how best to accomplish this? Any pitfalls to watch for? From what I understand you should only use the OEM Bentonite grease in these units. Is this true? Are there other types of grease that will work? Thanks!!
 
Is your transaxles in grease or a heavy gear oil? I don't have a Murrary but have one MTD with four speed and two Ropers with six speed manual transaxles. All of them run in 30 wt. motor oil and I add Lucas oil treatment.
 
Thanks. Yes, my machines use grease in their transaxles. They don't have any problems but I would like to replenish the grease. The 12 horse machine is a 1990 model and likely has well over 1,000 hours on it.
 
257 Roberts I did a little reading on that grease and sounds like a good product. If it was me I would find a good dealer and talk to their service tech and tell him what your wanting to do.It would also help to have a manual for transaxle. Just my two cents.
 
Those transmissions are sealed units.
There is no way I know of to get grease in them except to remove them from the mowers, and separate the two halves of the case. They will probably outlast the mower if you don't do a thing to them.

If you get too much grease in them it will come out somewhere. The seals are not much to brag about. The one I had apart, I put extra grease in and it soon started to come out the brake shaft and grease the brake disk. Which was annoying and occasionally a big letdown when it wouldn't stop and hit something.
 
I am planning to remove the transaxles from the mowers and open them to perform this. I'm just wondering, if I carefully separate the two halves are 100 spring loaded parts going to fly out? Should I open it upside down or right side up? I'm planning to disturb the internals as little as possible.
 
I have had them apart and they DO NEED repacking. The old grease dries up and isn't around the gears and hasn't been for some time. It is all around the edge of the case. That is the reason for the failure. Dig out the old grease and put in new that will flow at least a little. My opinion only, I have NEVER read that they should be repacked.
 
Hi as ldj posted clean all the old grease out and start with new I would recommend JD corn head grease it is a flow-able(pour grease) mush the same that some lawn mowers use in there trans. but is is much cheaper from John Deere , I use it my 641 Ford and the Earthmaster steering gearbox's and in the gearbox on the Heald Hauler lubes good and won't leak ouit a so so seals.
GB in MN
 
Here's a real easy way to do it. Look the case over
for a place to drill into it without hitting
anything, and tap it for a grease fitting, and load
it up. I wouldn't be too concerned about the type of
grease used, anything would be better than the gears
running dry like they are now. If anything, select a
winter grease for maximum flowability.
 
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