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'53 SC trans oil change: is this a good plan?

D

DennisT

Member
My 1953 Case SC hasn't had a transmission gear oil change since I got it 2 years ago. (Haven't run it much either) So with this hot weather, I figure it's a good time to do it. I've read some of the, "search," hits here which helped. I think I'll pull the drain plugs, (2), and drain most of it into containers. Then let it sit, still draining, for at least 2 days. I know the color of the old oil is a bit tan looking, so that's a bit of moisture through the years. No sign of water. Main question here tonight is: Should I flush trans case with anything? I thought about putting in a gallon of kerosene or something, letting it sit overnight, then re-draining for a day. My concern is if some of the kerosene gets trapped in any cavity and causes a problem later. So how do all of you handle this? Flush - no flush? With the price of 80/90 weight gear oil, I'd like to do it right the first time.
Dennis in E WA state
 
(quoted from post at 04:12:22 07/08/15) My 1953 Case SC hasn't had a transmission gear oil change since I got it 2 years ago. (Haven't run it much either) So with this hot weather, I figure it's a good time to do it. I've read some of the, "search," hits here which helped. I think I'll pull the drain plugs, (2), and drain most of it into containers. Then let it sit, still draining, for at least 2 days. I know the color of the old oil is a bit tan looking, so that's a bit of moisture through the years. No sign of water. Main question here tonight is: Should I flush trans case with anything? I thought about putting in a gallon of kerosene or something, letting it sit overnight, then re-draining for a day. My concern is if some of the kerosene gets trapped in any cavity and causes a problem later. So how do all of you handle this? Flush - no flush? With the price of 80/90 weight gear oil, I'd like to do it right the first time.
Dennis in E WA state
Click to expand...

I don't see why you need to change the transmission gear lube. If you are worried about the water in the lube let the tractor set for about a week to let all the water settle to the bottom. Then loosen the drain plug until the water seeps out between the threads, being careful not to let the plug fall out and making a mess on the floor.
 
I would change the gear oil. After 62 years you have no idea of the brew in that gearbox. Very possibly significant amounts of origonal oil + additions over the years. It could be quite a concoction. Chemistry has improved. Just the contamination over the years is another reason, the breathing system for that trans is not real sophisticated, not a real filter. Just my thoughts. I wouldn't flush with kerosine for the reasons you've mentioned. To be real sure, and if you really get a mess when you drain, I'd refill with gear oil, run it for a while, tractor tour would be great, you'd really be warming it up, and then drain again.
 
Good comments; thank you. I definitely intend to change the gear oil. There is enough discoloration to warrant that, I think. I did crack the drain plug a few months ago and NO water came out. Just the same discolored gear oil. So I was relieved to see that there wasn't a bunch of straight water collected. And, so far, pending additional comments, I think I'll not attempt to flush the case with kerosene, etc.
 
if you have not started draining yet ,,, you could add a bottle of red heet to then tranny and a couple qts or more of atf ,, drive it a week and then drain it ,, atf cleans ,, the red heet gathers all water and stiks it to the oil molecules ,, upon drainin , I would fill the tranny with 90 wt . and a qt of lucas tranny hub sealer .. as op;tion before refilling you could fill tranny with diesel fuel,,..you wil probably get leaks then . that may not want to go away .. triple up on the hub sealer,..scheaper and easier than changing seals
 
I don't know if you have any seals leaking, at the brakes or axles???? but if your going to change, with 80w90 as pricey as it is, maybe you need to attend to those. Just a thought. gobble
 
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