I suspect the poster mistyped (as you suspected) 2620 while meaning 2320 since profile shows owning a 2012 GC2400.Since you on in a thread about the GC Tractor series, @Dmacleo and I assumed you were talking about a mower deck for one of these tractors.
I have no idea where you would even look for information on that mower.
www.partstree.com
I would order from these guys but you might want to call and see if they have one in stock first AGCO 3606801M91 PULLEY/IDLERAny recommendations for good online store to buy from? Agco has it at 77.00
dealer marks up a bit to cover their cost.Any recommendations for good online store to buy from? Agco has it at 77.00

That is the basic situation I am in here. Dealer did not have one in stock, would have cost $25 to make it a priority and I still would have had to drive the hour one way to them.I guess it depends on your dealer.
If I went to my dealer for a part like the mower deck idler pulley I guarantee they would not have one in stock. They would have to order it. It would take a week or maybe weeks to come in. I would need to call them several times a week to see if it was in. They would probably mark it up even more for the special order and shipping.
Or I could order one online hand have it in 3 days without any hassle.
Don't get me wrong, my dealer is great when it comes to service. They will come out and work on my tractor, they will haul my tractor for little or no cost because I'm less than 10 miles away. But when it comes to parts they keep almost nothing in stock.
Hi, for future reference, 2 places you might find these parts or anything else for the GC:Correction. So Lindstrom sold me the part for their online price then proceeded to email me after my order confirmation that that part number changed and it's now $24 more. Pretty crappy that they sold me something and then wanted more money for it once they marketed it at another price and even confirmed my order.
used to use jacks a lot, prob 2500-3500$ a year for years. did lot of small engine repairs.Hi, for future reference, 2 places you might find these parts or anything else for the GC:
Roudebush Equipment - Your Choice for Outdoor Equipment Parts
We offer parts and services for Massey Ferguson, Toro and Bush Hog. We also carry parts for Kohler, Kawasaki, and other brands of small engine equipment.www.shoproudebushequipment.com
I bought something or other from them, don't remember what. Oils/filters for the Massey I mostly bought from Roudebush.used to use jacks a lot, prob 2500-3500$ a year for years. did lot of small engine repairs.
about 8 years ago they went downhill and often would charge you w/o shipping anything or would ship broken/incorrect parts.
many complaints at better business bureau