cub cadet 3186

[nolan1]

Is there any way to tell for sure if charge pump is bad in my cub cadet 3186. It will not move, deck will not go up or down and steering won't work. I wrote here before and verified drive shaft is spinning, has new cub hydro filter and cub hydro oil, has been purged. I guess next step is pull fenders off and replace pump? Any suggestions/hints would be greatly appreciated.

 

[OldMachinist]

There is a key on the input shaft of the pump. Even thou the driveshaft is turning if the key is sheared the pump shaft may not be. I would pull the driveshaft and input shaft adapter to check the key.
I uploaded the 3000 series service manual here Cub_Cadet_3000_Series_Service_Repair_Manual.pdf

There is a section in it on replacing the adapter with a new style one that doesn't use the key just Loctite to hold it from spinning on the shaft.

 

[VinceSMTA]

My guess is still charge pump. I have heard a couple of people say that they have replaced the charge pump through the seat opening. I have done a couple and just pull the fenders off as I like to check out the bushings for the hydro linkage. If you do pull the pump off make sure to pay attention at how it comes apart. When it is off look at the rotor assembly that is part of the charge pump assembly, my guess is that it has broke apart. The rotor assembly can be bought separately but make sure that nothing else is damaged. Good luck and keep us updated.

 

[nolan1]

There is a key on the input shaft of the pump. Even thou the driveshaft is turning if the key is sheared the pump shaft may not be. I would pull the driveshaft and input shaft adapter to check the key.
I uploaded the 3000 series service manual here Cub_Cadet_3000_Series_Service_Repair_Manual.pdf

There is a section in it on replacing the adapter with a new style one that doesn't use the key just Loctite to hold it from spinning on the shaft.

Thank you I will try it this weekend!

 

[nolan1]

My guess is still charge pump. I have heard a couple of people say that they have replaced the charge pump through the seat opening. I have done a couple and just pull the fenders off as I like to check out the bushings for the hydro linkage. If you do pull the pump off make sure to pay attention at how it comes apart. When it is off look at the rotor assembly that is part of the charge pump assembly, my guess is that it has broke apart. The rotor assembly can be bought separately but make sure that nothing else is damaged. Good luck and keep us updated.

Thank you I will try this weekend and post updates

 

[Molerj]

Hi, I am working on a 3165 which sounds the same. Owner had the same issues, would not move, power steering wouldn't work, deck would not raise or lower. I took apart the charge pump and found the gears that goes over the pump shaft to be broken. Looks as though the shaft may have been damaged also. I think the gear was spinning around and wore down the splines on the shaft. I will contact the homeowner to see what he wants to do. This is going to be pretty pricey.
This one shows the shaft

Here is the gear

And a close-up of the gear with a piece missing that I never did find.

 

[Molerj]

I ordered the charge pump today. Talked to a mechanic at the JD dealer that handles the Cubs & showed him the gear. He said he has seen the same thing happen and changed several of them. He couldn't really say why that happens. Hopefully, the shaft is not damaged too much. Owner agreed to trying the charge pump first before going the next step, which I really don't want to do, changing the shaft.

 

[VinceSMTA]

Are you going to replace the whole charge pump or just the rotor section. I have replaced a few of them for friends and have gone both ways depending on if there are metalic flakes present. Hopefully you will not need to change the shaft.

 

[Molerj]

Scratches on the charge plate. Can't that chance.

 

[Molerj]

Scratches on the charge plate.

Can't that chance.

Sorry, that was supposed to read "Can't take that chance"