175 front hydraulic pump

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   I needed to replace my fan belt so I pulled the tractor in the shop.  I disconnected the chain coupler and noticed that the sprocket was loose on the pump input shaft and both were worn pretty badly.
I have ordered a new pump shaft and sprocket from agco but I remember reading about someone using a different coupler a while back.  does anyone have recommendations of a better set up?

also, the pump seal kits are $100 each and there are 6 of them between the sections.  The shop foreman told me if it wasn't leaking, i could probably get by without replacing them.  I'm curious if anyone has experience with this.

thanks in advance.  Derek

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wekracer Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 13 Oct 2009 Location: Tebbetts, MO Points: 1590	Post Options Post Reply Quote wekracer Report Post Thanks(0) Quote Reply Topic: 175 front hydraulic pump Posted: 6 hours 24 minutes ago at 11:20am
	I needed to replace my fan belt so I pulled the tractor in the shop. I disconnected the chain coupler and noticed that the sprocket was loose on the pump input shaft and both were worn pretty badly. I have ordered a new pump shaft and sprocket from agco but I remember reading about someone using a different coupler a while back. does anyone have recommendations of a better set up? also, the pump seal kits are $100 each and there are 6 of them between the sections. The shop foreman told me if it wasn't leaking, i could probably get by without replacing them. I'm curious if anyone has experience with this. thanks in advance. Derek

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DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21685	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 5 hours 6 minutes ago at 12:38pm
	If the pumps (3) aren't leaking and working OK, I wouldn't spend a dime trying to fix something that isn't broken. It takes three seal kits, not six.

wekracer Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 13 Oct 2009 Location: Tebbetts, MO Points: 1590	Post Options Post Reply Quote wekracer Report Post Thanks(0) Quote Reply Posted: 3 hours 30 minutes ago at 2:14pm
	Dr, The sprocket was very loose on the shaft. the keyway and key had worn and rolled. I'm surprised it hadn't spun on the shaft yet and the shaft was worn down. I'm afraid if i try to put a new sprocket on the old shaft its going to be severely out of round and fail quickly.

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21685	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 2 hours 47 minutes ago at 2:57pm
	Well then, before you rip apart the pump to replace the shaft, you'd better have a new shaft in your hands.

BigGuy1000 Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 06 Dec 2013 Location: NWIL Points: 128	Post Options Post Reply Quote BigGuy1000 Report Post Thanks(0) Quote Reply Posted: 2 hours 45 minutes ago at 2:59pm
	In order for the replacement parts to last, they must be properly aligned during installation! To do this, install and tighten the new crank drive end and also the chain coupler, then make sure that the shaft on the chain coupler end has EQUAL amount of free play to each side of the crank coupler! If not, remove parts and file or grind the mounting ears to get the needed free play to each side and up and down, then assemble and check, redo if needed. If done properly, the drive will be good for many years(30 years on our AC15D). If not done, only 1 or 2 years! Parts also available from McMaster Carr!

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21685	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 1 hour 46 minutes ago at 3:58pm
	I had a 175 gas one time that wasn't aligned well at all. I finally positioned the front support in the best spot possible and drilled/tapped 1/4" grade 8 bolts thru the side frames and into the front support to insure accurate and consistent alignment of the drive shaft. The holes in the side frames and front support are too oversized for good and consistent positioning.