Transmission flush

[W/H JUNKY 43]

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

[dbartlett1958 96]

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.

[boovuc 1,090]

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

[SousaKerry 502]

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.

[stevasaurus 22,872]

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.

[Chevydave 25]

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.

[oldlineman 1,482]

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

[Hodge71 664]

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

[Chevydave 25]

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