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  1. Just picked up a 520HC needing the 112791 flat idler pulley. This pulley is used on all later model Hydro tractors without the belt tension release lever. Thought no problem, till I saw the price( $66.70 ). Called my local dealer and he said there is another comparable pulley (93-1622) but the spacer needs to be swapped from the old pulley. This pulley which is the same size in every aspect but with a smaller spacer was $25.00. These are both toro pulleys and pricing? I guess the longer spacer justifies the $40.00 price difference, silly me. Anyway, swapping the spacers is very simple. It can be done very easily with a press and tooling. It can also be done just as easily with 1/4" rod, 2 washers, 2 nuts and a socket. My press is at work so I chose to use the second method. The most important thing to do is to support the bearing and not the pulley. Find yourself a deep well impact socket that sits evenly around the inner most spot of the pulley( the lip that contains the outer race of the bearing). Take your rod and run it through the socket and the bearing/ spacer. Tighten your nuts and washers down on either side while making sure everything is lined up and keep on tightening. Once the nut can no longer be reached inside the bearing ( due to the nut being pulled into the bearing with the spacer coming out the other side), unscrew the 1/4" rod. Find another socket smaller than the inner race of the bearing that reaches the spacer down inside inner race. Support the pulley on your deep well socket and wack the smaller socket with a hammer and out pops your spacer. To install the longer spacer, swap the deep well socket to the other side of the pulley. Tightening the nuts will now draw the spacer into the pulley. Tighten just enough to seat the new spacer. This is an easy and cheap way to do this and prevent damage to the bearing or the new pulley. I have not seen this documented before and searched for awhile till coming up with this. This is simple for anyone and hope it helps save someone some time and money. Glad my local dealer wasnt trying to up sell me and helped me out on this one. Kyle
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