Winkster 12 #1 Posted July 14, 2020 Hi folks; You helped me tremendously years ago. I have a 1976 C-120 with the Kohler K301 engine. To begin, I'm dumb. I've never done anything with the transmission and just drained it. The fluid looked awful. Is there a filter in there somewhere? I'm assuming there is but I don't want to dig in until I have some idea of what to do. I can take stuff apart and put it back together but I'm not sure what to do next. What type of fluid should I use once I get to the proper time to do it. Thanks in advance Dave (the dummy) Share this post Link to post Share on other sites
Stepney 2,325 #2 Posted July 14, 2020 Hey Dave, that an automatic or a manual model? Share this post Link to post Share on other sites
Winkster 12 #3 Posted July 14, 2020 Manual. 8 speed, High and low setting with 3 forward and 1 reverse. That was an incredibly quick response. Thanks 2 Share this post Link to post Share on other sites
Stepney 2,325 #5 Posted July 14, 2020 No filter there. But you can drain it down, and jack the front end up, there is a hump in the transmission casting that will hold some oil. After that, you could fill it with diesel fuel and idle around for a short time, flush, then fill with oil and flush, repeat that until it looks good and clean.. Those are tough gearboxes. You'd be hard pressed to hurt it unless it was run dry. 6 Share this post Link to post Share on other sites
Winkster 12 #6 Posted July 14, 2020 I'm continually impressed by this forum. You folks are outstanding. Thank you. Dave 4 1 Share this post Link to post Share on other sites
Winkster 12 #7 Posted July 14, 2020 9 minutes ago, The Tuul Crib said: T😎 10 minutes ago, The Tuul Crib said: T😎 Share this post Link to post Share on other sites
Winkster 12 #8 Posted July 14, 2020 Thanks to all. Extremely helpful and unbelievably quick response. Thanks again, Dave 2 Share this post Link to post Share on other sites
The Tuul Crib 7,337 #9 Posted July 14, 2020 Just wanted to let you know that these tractors tend to multiply! Better make room!! 4 Share this post Link to post Share on other sites
Lee1977 6,777 #10 Posted July 14, 2020 You might need a new shiftier boot if water has gotten in the transmission. Wheelhorse Parts and More down in the venders section sells them. 3 Share this post Link to post Share on other sites
SylvanLakeWH 25,927 #11 Posted July 14, 2020 5 hours ago, Lee1977 said: You might need a new shiftier boot if water has gotten in the transmission. Wheelhorse Parts and More down in the venders section sells them. If the old oil looks like a chocolate milkshake, you likely have water in there (very likely)... a new shifter boot will correct that issue... 3 Share this post Link to post Share on other sites
953 nut 55,771 #12 Posted July 14, 2020 Here is a link to the member who can fix you up with a shift lever boot. https://www.wheelhorsepartsandmore.com/transmissions.html#!/Wheel-horse-3577-shifter-boot/p/84932555/category=23548039 2 Share this post Link to post Share on other sites
stevasaurus 22,863 #13 Posted July 14, 2020 You want to use 90wt oil, and depending on how much oil you drained it will take 1 1/2 to 2 qts. Share this post Link to post Share on other sites
Winkster 12 #14 Posted July 14, 2020 Thank you. I just picked up some diesel to clean the tranny out this morning. The type of transmission fluid was the next question. I appreciate it. Dave 1 Share this post Link to post Share on other sites