NAA Vane Pump Disassembly

[John P.]

I'm starting to disassemble a vane pump that pumps fine but leaks really bad.
Is there any trick to getting the drive gear and its housing off the pump body?
Thanks.

 

[mhb@ufe]

I'm starting to disassemble a vane pump that pumps fine but leaks really bad.
Is there any trick to getting the drive gear and its housing off the pump body?
Thanks.

You need to remove the proof meter drive from the end of the pump and then you can get to the bolt that holds the gear to the shaft.

 

[John P.]

You need to remove the proof meter drive from the end of the pump and then you can get to the bolt that holds the gear to the shaft.

Thanks Mark, I did not know there was a bolt there.

 

[Tim PloughNman Daley RIP]

I'm starting to disassemble a vane pump that pumps fine but leaks really bad.
Is there any trick to getting the drive gear and its housing off the pump body?
Thanks.

Here are the pages from the MPC for parts view and descriptions if that helps. There is a document on the NAA Vane Pump R&R'g but YT won't allow me to post it here cuz it's on the "other" N Tractor site. Go to the How-To's Forum there to download.

Tim Daley (MI)

 

[John P.]

Thanks guys, once I removed that bolt down inside the tach drive housing, everything else came apart easily.
I've got some new bearings, seals, o-rings, and gaskets on order to freshen this thing up.