Captian Kirk Posted November 23, 2022 Share Posted November 23, 2022 I drained out my gearbox and the gear oil was a milky tan in colour. What's the best way to flush it out? Diesel and a short drive around, drain and repeat then new gear oil? I still need to get the 130L of gear oil, just don't want to add new stuff and have it go milky. Quote Link to comment Share on other sites More sharing options...
Lars (midessa) Posted November 23, 2022 Share Posted November 23, 2022 ‘Gearbox’ meaning what? Tranny? Rear end? Truck? Farm tractor? Quote Link to comment Share on other sites More sharing options...
Captian Kirk Posted November 23, 2022 Author Share Posted November 23, 2022 1 minute ago, Lars (midessa) said: ‘Gearbox’ meaning what? Tranny? Rear end? Truck? Farm tractor? It's on my 434 tractor. It's not a transmission, it's where the straight cut gears are. Quote Link to comment Share on other sites More sharing options...
nomorejohndeere Posted November 23, 2022 Share Posted November 23, 2022 rinse and let drain with diesel if you wish then use cheap oil and drive and drain warmed up then go with the good stuff 1 Quote Link to comment Share on other sites More sharing options...
nomorejohndeere Posted November 23, 2022 Share Posted November 23, 2022 Does the cavity serve as a hydraulic supply? Quote Link to comment Share on other sites More sharing options...
ksfarmdude Posted November 23, 2022 Share Posted November 23, 2022 So basically the transmission then ? Use the cheapest light weight oil you can find 10wt is best use a new filter and flush it with that Not sure what your trying to flush out Metal ? water ? not enough information , the straight cut gears are transmission then Quote Link to comment Share on other sites More sharing options...
Farmall Doctor Posted November 23, 2022 Share Posted November 23, 2022 Visit your friendly local tractor dealer and ask them for some used Hy-Tran. I have a dozen pails of good used stuff that I keep in the barn for just this purpose. Run it up and down the road for 15 minutes and drain it right away. Then let it drip overnight and you are good to go! 3 Quote Link to comment Share on other sites More sharing options...
Captian Kirk Posted November 23, 2022 Author Share Posted November 23, 2022 44 minutes ago, nomorejohndeere said: Does the cavity serve as a hydraulic supply? No just the drive gears and rear differential. It takes just 80 W 90 gear oil. Hydraulic reservoir sits on top of it. Separate fluid there. Quote Link to comment Share on other sites More sharing options...
Captian Kirk Posted November 23, 2022 Author Share Posted November 23, 2022 35 minutes ago, ksfarmdude said: So basically the transmission then ? Use the cheapest light weight oil you can find 10wt is best use a new filter and flush it with that Not sure what your trying to flush out Metal ? water ? not enough information , the straight cut gears are transmission then I'm trying to flush out the water oil mix and there is some gunk in it also. Quote Link to comment Share on other sites More sharing options...
nomorejohndeere Posted November 23, 2022 Share Posted November 23, 2022 New boots on your shifter levers is prolly in your future... Keep your shifter levers covered, like an exhaust, so rain doesn't just flow in there............ 1 Quote Link to comment Share on other sites More sharing options...
Captian Kirk Posted November 23, 2022 Author Share Posted November 23, 2022 2 minutes ago, nomorejohndeere said: New boots on your shifter levers is prolly in your future... Keep your shifter levers covered, like an exhaust, so rain doesn't just flow in there............ I think that was the problem, it had a half cab on it for a long time being outside, we took the cab off and it sat out in the spring a some of the summer out before I got it. It stays out of the rain now, but I will be replacing the boots soon. Quote Link to comment Share on other sites More sharing options...
Binderoid Posted November 23, 2022 Share Posted November 23, 2022 No boots. Quote Link to comment Share on other sites More sharing options...
Captian Kirk Posted November 23, 2022 Author Share Posted November 23, 2022 5 minutes ago, Binderoid said: No boots. I haven't really looked, I did see a bit of black tape wrapped around it for some reason. Quote Link to comment Share on other sites More sharing options...
Binderoid Posted November 23, 2022 Share Posted November 23, 2022 Its a steel bell cap with a o-ring around the shift lever , accessible after removing the spring 1 Quote Link to comment Share on other sites More sharing options...
Binderoid Posted November 23, 2022 Share Posted November 23, 2022 Unless all those parts are missing Quote Link to comment Share on other sites More sharing options...
Captian Kirk Posted November 23, 2022 Author Share Posted November 23, 2022 1 minute ago, Binderoid said: Unless all those parts are missing All that is there, I haven't taken anything apart yet to look under the cap. Quote Link to comment Share on other sites More sharing options...
Captian Kirk Posted November 23, 2022 Author Share Posted November 23, 2022 3 minutes ago, Binderoid said: Unless all those parts are missing What would you recommend to flush with ? Seeing the color of the gear oil. Quote Link to comment Share on other sites More sharing options...
supermechanic Posted November 24, 2022 Share Posted November 24, 2022 cheapest jd 303 oil you can find, followed by the correct spec oil. 1 Quote Link to comment Share on other sites More sharing options...
65806 Posted November 24, 2022 Share Posted November 24, 2022 My Caterpillar D2 manual says to drain transmission and final drives, fill with kerosene, drive around for 10 minutes without any load, drain and fill with 90wt. 4 Quote Link to comment Share on other sites More sharing options...
ray54 Posted November 24, 2022 Share Posted November 24, 2022 I think it is condensation more than rain getting in. Not like a fuel tank you fill right up to the top. But still good to cover the shifter levers if it is outside. 1 Quote Link to comment Share on other sites More sharing options...
Gearclash Posted November 24, 2022 Share Posted November 24, 2022 3 hours ago, Farmall Doctor said: Visit your friendly local tractor dealer and ask them for some used Hy-Tran. I have a dozen pails of good used stuff that I keep in the barn for just this purpose. Run it up and down the road for 15 minutes and drain it right away. Then let it drip overnight and you are good to go! This here is one of the better ideas here. Used Hytran won’t hurt a thing, but being Hytran it should help pull more of the excess water out of the transmission than what any of the cheaper oils will do. 4 Quote Link to comment Share on other sites More sharing options...
stronger800 Posted November 24, 2022 Share Posted November 24, 2022 That’s perfect logic, but I wouldn’t use just anybody else’s discarded oil, for fear of it having contamination of some sort. Walmart brand motor oil is $14 a gallon. Maybe tractor supply yellow bucket stuff is even cheaper? (Never purchased either for use In anything) but I think it’s what I would do in this case. Get it warm. Or if you have a warm shop, have it all warm, then you only need to go for a short drive, and then let it drain out overnight. Everybody here has probably seen oil much milkier than what we’re talking here. Random machine gear boxes or what not. 1 Quote Link to comment Share on other sites More sharing options...
nomorejohndeere Posted November 24, 2022 Share Posted November 24, 2022 If it's your used oil or somebody you know. Otherwise my bet is you would get a mixture of whatever is in the barrel..... If the trans has a removeable top plate/side plates you could open it and wipe the insides down and splash the gears and bearings with some clean oil of your choice and button it up and fill and call it good. The next time you service you would get the rest... Either way it's gonna be way more happy than what it was..... 1 Quote Link to comment Share on other sites More sharing options...
nomorejohndeere Posted November 24, 2022 Share Posted November 24, 2022 Search your autoparts store online for cheapest oil. I got some from O'Reilly they delivered to my door to flush a similar deal. It was motor oil 0-20 or something. no thrills stuff. They don't keep it on the shelves. 1 Quote Link to comment Share on other sites More sharing options...
Binderoid Posted November 24, 2022 Share Posted November 24, 2022 3 hours ago, Captian Kirk said: What would you recommend to flush with ? Seeing the color of the gear oil. All of the suggested liquids will do equally well. One thing I might do different rather than driving it around would be to lift one rear wheel off the ground... this will make the spider gears work the contaminated out rather than simply covering them up. 1 Quote Link to comment Share on other sites More sharing options...
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