8 speed gear lube change question

[AKincer 6]

I have a C-125 8 speed that I use to mow and plow snow at the lake house. Headed out tomorrow to take the deck off, put the slow blade on, and change the gear lube. I want to make sure I take the right tools. I think the drain plug for the gear lube is an allen head. Can someone confirm that is true and help me with the size?

Thanks in advance!

[Sparky-(Admin) 21,414]

Yes its an Allen head. I think its 1/4" but to be safe bring every size you have , just in case. I always find that the allen head hole is filled with crud stopping the allen key from getting seated in all the way. Make sure you have something to pick any crud out...you dont want that sucked to get stripped!

Mike....

[Wheel-N-It 2,969]

Once you have the allen head cleaned out, take a small pair of curved vice grips and clamp around the remaining threads sticking ut of the bottom of the transmission case. Then insert the allen socket and with the ratchet in one hand and the vice grips in the other carefully nudge the plug loose. If you ever round out the allen part of the plug you are pretty much out of the game until you can weld a bolt to the plug then turn it with a wrench.

[AKincer 6]

i've got a set of allen sockets that run up through 3/8 so I should be good. Just wanted to make sure it wasn''t bigger than that. Sounds like a good plan with the vice grips! Thanks guys.

[rmaynard 15,610]

1/4" is the correct size.

[leeave96 487]

I also seem to remember that some folks replace the plug with the recessed allen hex hole with one with a square boss - to eliminate the potential of stripping the allen head on the next 40 years ( ) of tranny oil changes.  The only hazard from doing that is hitting a hard/immovable object and breaking the tranny housing.

 

Just a thought.