Changing a Pulley

TdPoL · Nov 27, 2016

Hi Everyone,

I just bought my first tractor (Ferguson TO20), and I am learning mechanics as I go along. Some of my questions will be very
basic. I am currently converting it from a 6v system to a 12v. The new 12v generator's pulley is smaller then my belt. It came
with an second pulley that will fit the belt, but I can't figure out how to get the first pulley off for the life of me! I'm sure
this is a very basic question, but I could definitely use some help. Thanks!

Bob · Nov 27, 2016

Zip it off with an impact wrench.

Ian Beale · Nov 27, 2016

If you haven't got an impact choke a fan belt around the pulley with a set of visegrips to hold it

old · Nov 27, 2016

Impact is th best way to go if you have one. If you do not have one you can hold the pulley with a set of channel locks and hit the wrench with a hammer and that does it most of the time. That is what we call a poor mans impact wrench

Chuck (CA) · Nov 27, 2016

You might also look around the inside of the pulley for a hole going towards the shaft. There might be a lock screw holding it in place...normally an Allen screw.

Charles in Aus. · Nov 27, 2016

THis is the generator pulley from my 1952 TED 20 , made in the UK . It should be the same as yours .

This shows the nut removed , simple , normal right handed thread . The pulley itself can be a bear or it just falls off . Either way you will need patience and some thin levers between the casing and the underside of the pulley . Be wary of tapping the shaft or you will ruin the threads , a little heat on the pulley and a decent gear puller used carefully will probably move the most difficult ones .

Steve@Advance · Nov 27, 2016

If you can't get it off, or any doubt it will fit the alternator, you can find a wide pulley for that alternator.

Check with a rebuild shop, or Ebay.

Russ from MN · Nov 27, 2016

Back the nut off just a couple of threads and then tap it, preferably with a brass hammer. If there is a washer under the nut take that off to give you more
room, and spray it with penetrating oil.

JerryCPP(WA) · Nov 27, 2016

I've done that exact thing with my TO-20. Use an impact wrench to remove the nut holding the pulley on, or as suggested by others, hold the pulley with a V-belt and use a socket to take the nut off. The pulley should slip off quite easily once the nut is removed. The shaft size is the same as that on a Delco alternator. Remove the Delco pulley with an allen wrench holding the rotor, and box end wrench on the nut if you don't have access to an impact wrench. Put the old TO-20 pulley on the alternator shaft, and tighten with impact or allen and box end wrench.

Changing a Pulley

TdPoL

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Bob

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Ian Beale

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old

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Chuck (CA)

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Charles in Aus.

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Steve@Advance

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Russ from MN

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JerryCPP(WA)

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