Size does matter!

Mace Canute · Mar 3, 2015

This weekend when I was out at my buddy's acreage he wanted to move my JD 70 from where it's been parked all summer and winter over close to his shop in preparation to install a taper lock on the flywheel. The flywheel splines are worn and started to make noise and rather than running it and ruining the crank the decision was made to park it until he could fix it. Tightening it up on the crank only worked for a very short period of time and then it would work loose enough again and make noise. It was nice Sunday and we tried to pull it with my JD 3010 which was an effort in futility since we had a warm spell earlier which resulted in a lot of ice and no traction even with the added weight of a FEL on the front and a snowblower on the back. We'd been using the 3010 so it was running and warmed up so naturally we hooked up to it. Since that didn't work it was time to fire up my JD 4630. After letting the coolant heater do it's thing for an hour or so it fired right up. We hooked up to the 70 and the 4630 pulled it away at an idle without even spinning a little bit! 16,000 lbs of tractor got the job done!

davesl708 · Mar 3, 2015

Got to love working in the cold and ice. Weight is great.

eddieirvine · Mar 3, 2015

double posted ignore this one

eddieirvine · Mar 3, 2015

just happen upon your post and read where your friend is going to install a taper lock good choice for a fix, when I was a machinist maintenance guy for 35 years we used what they call an ETP bushing, basically it looked like a taper lock but what it was is bored for your size shaft and then the outside diameter is turned to a couple sizes bigger than the bore, you have to machine the part this goes into to a nice slide fit then there is several allen bolts all around the outside diameter of this, as I recall this is a two piece outfit. how it works is your slowly tighten all the bolts around the perimeter of this piece and inside these two pieces is hydraluic fluid that forces against the inner bore, they specify a torque for each allen head bolt this puts a ton of pressure on the outer bore and these things will never let go under extreme conditions. We had a big cyl on a printing press that was shearing a one inch key, we eliminated that key and bored the cylinder out for this ETP bushing installed it and followed the directions for bore sizes and torque specs. The shearing problem was caused by sever choke ups with paper. We installed one of these ETP bushings and ofcourse they still have terrible chock ups but never once did we have to touch this part of the press again. Not saying you need one of these just passing this along I will look these up and see if I can post a picture of one. Great product to say the least. Here you go found them

Keyless Shaft Bushings

Industrial Toys · Mar 3, 2015

An old seasoned woodsman/outdoorsman/trucker and friend (unfortunatley now deceased) of my Dad, once told him "when you go into the bush, take the BIGGEST machine you have".

ovrszd · Mar 3, 2015

Leverage, it's all about leverage.....

Mace Canute · Mar 3, 2015

eddieirvine, the taper lock we have was made and sold to us by a machinist in the USA. He makes an internally splined taper that is threaded on the outer end and it slides on where the flywheel sits normally. The flywheel is bored out at an angle to match the internally splined taper and is then slid onto the splined taper and a honking big nut is tightened up on the end of it. There's a little more to it than that but that's the basic procedure.