W/H JUNKY 43 #1 Posted October 8, 2013 Hi All Today I pulled the drain plug on the rear end of my B-80 and it was 1/4 of the way full of water. So it has drain all day. Is there something I should flush the rear end out with before I add the new gear lube in it. Or should I just put in the new lube in and run it then drain it again. Thanks Chris Share this post Link to post Share on other sites
dbartlett1958 96 #2 Posted October 8, 2013 Chris, Welcome to Red Square! To answer your question, I would do as you though, and refill with lube, run it for a while and drain and fill again. I believe there are internal castings that will not let things drain completely unless you really tip things, so you may want to try that before you add new oil. I am sure others will chime in as well. Share this post Link to post Share on other sites
boovuc 1,090 #3 Posted October 8, 2013 (edited) A kerosene flush sounds in order. Fill the tranny with kerosene to the level the gear oil should be at. In first gear, run the tractor around a short area doing a figure eight or two then shut it off and do a complete last drip drain before adding your new gear oil. Edited October 8, 2013 by boovuc 1 Share this post Link to post Share on other sites
SousaKerry 502 #4 Posted October 8, 2013 If you lift the front end of the tractor up to a 35-45 degree angle you will get a larger amount of fluid out. There is a hump inside the casting that the oil gets trapped behind. Share this post Link to post Share on other sites
stevasaurus 22,878 #5 Posted October 8, 2013 Diesel fuel works well also. Weather you use kerosene or diesel, put in about 2 qts. Tilt the front end up like Sousa said, but also jack up each side (one side at a time)...this will empty the axle tubes. You may want to flush twice if what you drain looks dirty. You only need to run the tractor about 10 to 20 minutes. I would put the horse on blocks to run, in case the seals start leaking with the thin oil...don't want that stuff in your lawn. Share this post Link to post Share on other sites
Chevydave 25 #6 Posted October 10, 2013 I did it with standard SAE 30 motor oil. Drove it around the yard a few times. You may have to do it several times to be sure it's all out. Share this post Link to post Share on other sites
oldlineman 1,482 #7 Posted October 30, 2013 (edited) Does anyone know what gear oil is right for a 414-8 transmission? 80/90 or 90/140 GL5. I have a 1979 c101 that calls for 90/140 .Thanks Edited October 30, 2013 by oldlineman Share this post Link to post Share on other sites
Hodge71 664 #8 Posted October 31, 2013 Does anyone know what gear oil is right for a 414-8 transmission? 80/90 or 90/140 GL5. I have a 1979 c101 that calls for 90/140 .Thanks I have used 90/140 with great success but I also don't use my 8 speed in the winter. Its strictly a mower. I use my 1973 18 automatic and 1971 Charger 12 Automatic to plow. If you use it in the winter 80/90 might be better as it will not be so thick in very cold weather Share this post Link to post Share on other sites
Chevydave 25 #9 Posted October 31, 2013 I use the 80/98 sincromesh from Royal Purple. The tractor is used year round and it stays cool in the hot summer 2 hour mows. Mine is a 416-8. It's a little pricey but for as often as you have to change it I figure it's worth it. IMO I use the 80/90 sincromesh from Royal Purple. The tractor is used year round and it stays cool in the hot summer 2 hour mows. Mine is a 416-8. It's a little pricey but for as often as you have to change it I figure it's worth it. IMO Share this post Link to post Share on other sites
