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Re: T500 / T350 Oil Pump Seal Kit

Posted: Thu Dec 29, 2016 4:23 am
by jabcb
oldjapanesebikes wrote:
dgoodsy wrote:Does anyone know if there is a similar kit available for the gt750 (j) oil pump?
What exactly do you need for the GT750 pump ? 8)
For the GT380/GT550/GT750 pumps:
The oil seal at the bottom of the pump is available from Suzuki.
The oddly-shaped top gasket is available from the UK eBay seller, astraxuk. I think its also available from the German seller that you have to contact via email.

For the control arm shaft seal in both types of pumps:
Bloop2’s pic for the T-series kit doesn’t show the seal, but I think his kit now includes that o-ring.
The GT380/GT550/GT750 pumps has the seal, but I have no info on it.

Re: T500 / T350 Oil Pump Seal Kit

Posted: Thu Dec 29, 2016 10:56 am
by oldjapanesebikes
jabcb wrote:The oil seal at the bottom of the pump is available from Suzuki. The oddly-shaped top gasket is available from the UK eBay seller, astraxuk. I think its also available from the German seller that you have to contact via email..................Bloop2’s pic for the T-series kit doesn’t show the seal, but I think his kit now includes that o-ring.
I was actually waiting till the fellow asking the question had clarified what he or she thought they needed, however:
  • - the oil seal is available from anywhere - its just a standard seal so all you need to do is match the size
  • - the fellow in Germany is Reiner - just email him for a price list, and his contact info is found on this link, along with contact info for other suppliers I have dealt with
  • - that shaft seal is not an o-ring - it is a u-seal and finding a good replacement is proving problematic
8)

Re: T500 / T350 Oil Pump Seal Kit

Posted: Thu Dec 29, 2016 11:04 am
by dgoodsy
oldjapanesebikes wrote:
dgoodsy wrote:Does anyone know if there is a similar kit available for the gt750 (j) oil pump?
What exactly do you need for the GT750 pump ? 8)
I don't even know exactly to be honest. I had the pump out and rigged up away to spin the pump and watch the output, when I moved the pump lever to the full throttle position 4 ports remained outputting next to nothing while 2 of the ports started pushing much more oil through. I guess that's indicative of a sticking piston, but I don't trust the seals which may have been dry for a number of years. I figure if a seal kit is reasonably priced I may as well replace them.


Thanks for the leads on the parts guys, I will be looking into them!

Re: T500 / T350 Oil Pump Seal Kit

Posted: Thu Dec 29, 2016 3:06 pm
by oldjapanesebikes
dgoodsy wrote:........when I moved the pump lever to the full throttle position 4 ports remained outputting next to nothing while 2 of the ports started pushing much more oil through. I guess that's indicative of a sticking piston, but I don't trust the seals which may have been dry for a number of years. !
Could be a sticking piston. Take a read through the pump section in the GT750 Shop Manual as there is some good information there. I have a copy on line at this link if you don't have one. As well Richard has done a great write-up on the pump operation which you can fine on his own site (here), and which is also cross posted on mine (here).

Hope that helps. 8)

Re: T500 / T350 Oil Pump Seal Kit

Posted: Thu Dec 29, 2016 5:28 pm
by jabcb
One more useful link…

The PO had taken the pump actuator arm off of the pump on one of my GT750s. He then installed it 180 degrees out.
I had a spare pump & came up with a way to figure out how to properly orient the actuator arm.
See: viewtopic.php?f=2&t=11662&p=155174&hili ... mp#p155174

Re: T500 / T350 Oil Pump Seal Kit

Posted: Thu Dec 29, 2016 5:36 pm
by dgoodsy
Thanks a lot guys. I have skimmed through most of those links but with me not really being familiar with the pumps lots of it went over my head. I will have them handy when I am ready to check the pump again and have it in front of me.

Re: T500 / T350 Oil Pump Seal Kit

Posted: Mon May 07, 2018 4:49 am
by PippiFyrecracker
Hey! Does anyone one on here still have freds contact info? I want to buy one of those kits and I just realised we both live in the province!!! :D

Re: T500 / T350 Oil Pump Seal Kit

Posted: Mon May 07, 2018 6:12 am
by jabcb

Re: T500 / T350 Oil Pump Seal Kit

Posted: Sat Jan 12, 2019 1:13 pm
by smokin_blue
For those who have rebuilt the T500 pumps are there any critical points or things to know (whether it be pulling, rebuilding, or reinstall) before I pull the pump and replace the seals?

thanks!

Re: T500 / T350 Oil Pump Seal Kit

Posted: Sat Jan 12, 2019 3:18 pm
by jabcb
The small bolt used to prime the pump has left hand threads.

Beyond that, its a pretty simple & reliable design.

Re: T500 / T350 Oil Pump Seal Kit

Posted: Sat Jan 12, 2019 3:25 pm
by smokin_blue
Great! thanks!