Hyster S50XL:
Leaking Hyd fluid out of the starter motor

We have a Hyster c187 S50xl forklift at one of our high schools that is used to unload metal for the metal shop. The problem is it is leaking HYD fluid out of the starter after it is shut off. It does not seam to leak while it is running but once shut off the next morning it will have a good puddle under it. I know it has a wet bell housing as the Hyd pump is chain driven and is lubricated off of the steering return line. That line also supplies the jet pump to return Hyd oil back to the tank. The pump seam to be working ok as we have good flow on that line. The starter has been replaced 4 times now by a shop and they have given up on the lift. Any ideas? I have read a few posts on here about this subject but can not see where it was ever solved?? Thank you for any help or even ideas what it might be.
  • Posted 7 Nov 2017 06:11
  • Discussion started by Rebel57
  • California, United States
Showing items 1 - 14 of 14 results.
Hey man can I get some more info on this, I'm having the same issue and wondering which line to put the ball valve in and what the full fix would be and where the sensor for the oil level because now I can't get the truck to start after replacing the starter
  • Posted 22 Oct 2022 06:51
  • Reply by David_Justice
  • Idaho, United States
No we just installed the one. And yes a check valve would probably work. And yes this fix is still working! As long as the ball valve is turned off after use
  • Posted 29 Jun 2021 05:13
  • Reply by Rebel57
  • California, United States
Hi, I know your post is a little old but I'm just curious if you put a ballvalve on the return line by the hydraulic tank fill? Also, do you think a check valve would work? Then you wouldn't have to ever shut anything off but this way it wouldn't drain back.
  • Posted 4 Jan 2021 02:40
  • Reply by Adam_Wood
  • Montana, United States
Well I don't know if anyone cares, but we have fixed the problem! I know it has been quite awhile since the last post here. Please keep in mind the repair of this forklift is not my main function and is very low priority. My hunch that the system was bleeding of was correct. To test this we placed a ball valve on/in the return line from the control valve. When finished with the forklift simply shut off the valve and wonders of wonders no leak!! With the valve in the off position the lift will not start so no chance of running it dry which was a nice plus. And if it is not shut off after use it will only leak oil making a mess to clean up. Since this fix works and I can not see spending any more money on this lift. That is used for maybe an hour a month at most. I am done, if it was used more I would probably replace the valve. To recap what was done when in the shop (not ours) they replaced the starter supposedly 6 times checked the scavenger tube and so on for obstructions. When we got it back we opened it up and checked the venturi and jet pump everything looked good there. Replaced the starter one more time as that is what everyone says it is. still leaked so we opened up the starter and went through the seals saw some weak areas and reinforced them still leaked. Bought and installed new hyd pump got somewhat better but after about four days started leaking again. last installed ball valve in return line and now no leaks. So to be honest I am not sure if the pump and starter was necessary or if it took all of the above to fix it but we are back in business now! I hope this will help someone else down the road or maybe someone has a simple fix for this and I can remove the valve and put it back as designed because right now if you don't know about the valve your not starting it which might be just extra security.
  • Posted 26 Mar 2019 01:57
  • Reply by Rebel57
  • California, United States
Well we got the new pump and installed it! for four days not a drop leaked. Left Friday night and on Monday morning came back to a small puddle. It has been slowly growing over a couple of weeks now. The only thing I can think of is something has to be leaking/bleeding off and filling the bell housing somehow.
  • Posted 2 Jun 2018 08:14
  • Reply by Rebel57
  • California, United States
Congratulations!! I hope it continues to hold for you. Out of all the answers/comments I have read all over the place this one makes the most sense. You also have proof it worked! most everyone gets stuck that it is a wet bell housing so it must be the started. I can not think of one sane person that would intentionally put a starter motor where it would live and work submerged in oil, seals or not. I am looking for a pump for the old girl now.

Thank you
  • Posted 16 Mar 2018 08:50
  • Reply by Rebel57
  • California, United States
I think Ive found the problem, I recently spent a good amount of time on the truck we have with that issue, and as mentioned in a earlier post, i Believe it was the hydraulic pump, which cured the problem, we had flow from the jet pump, but it may not have been enough for the jet pump action to draw the excess fluid out of the bell housing, and actually the way its designed, if your flow is too low you will instead, fill the bell housing, so far after checking this unit out since the replacement, the bell housing is holding a slight amount of oil on the bottom,
  • Posted 14 Mar 2018 06:45
  • Reply by steppednit
  • Tennessee, United States
Steppednit,
I agree with your thoughts on the scavenger tube area and that is where I am looking also. I could be all wet but seams to me like it over fills once it is shut off raising the oil level. I do not see away to adjust the height of the tube to lower the level but.......

sitting here thinking about it may be i spoke to quickly about adjusting the spray flow?? if the flow spraying on the chain was lessened it would have to send more to the scavenger tube which in turn should *** out more oil from the bell housing possibly lowering the level???? just thinking
  • Posted 14 Mar 2018 03:14
  • Reply by Rebel57
  • California, United States
The only problem I see with your thought is it only leaks when parked at least in my case. It will run all day and not leak but once shut off it will start leaking. So again in my case the amount being sprayed does not seam like it would come into play.

Thank you for your thoughts and for some it may help.
  • Posted 14 Mar 2018 02:56
  • Reply by Rebel57
  • California, United States
The spray tube on the older Hysters was adjustable. I am not sure this unit has that ability.
  • Posted 8 Feb 2018 00:31
  • Reply by BREWSKI
  • Nebraska, United States
I have the exact same problem and thoughts on this problem, seems to be a volume of oil issue since its intermittent, and leaking from starters that have been recently replaced, I think its up to us to find a solution and post it, to put this evasive annoying problem to bed, any further recommendations ,from anyone with experience with this problem,I am going after the scavenger
tube area myself
  • Posted 7 Feb 2018 11:26
  • Reply by steppednit
  • Tennessee, United States
If it was easy, everybody would do it.
Thank you for your reply Kevin
Yes it does have a wet bellhousing and the gasket between the starter and the bellhousing is sealed good no leaks there. And i agree with you it is probably the seal in the starter. But it seams to me the oil level is way to high in the bell housing. The lubracation for the chain is sprayed on to it via return line from steering so to me no real need to have 6 (that is an arbitrary number I do not know what the real depth is) inches of oil in the bottom of the bellhousing. And i know a seal is a seal but is the starter really designed to run submerged in oil? One thing I do notice is that there is no check valve in the return line so what ever is in the line when the engine is turned off will flow back into the bellhousing causing the level to rise to some extent. Since it does not appear to leak while running only after being shut off is it possible that is what is causing the problem? If so is there anyway to adjust the jet pump lower to compensate for the drain of the return oil?
Thank you again for any help replacing the unit is not in the budget any time in the near future.
  • Posted 8 Nov 2017 03:24
  • Reply by Rebel57
  • California, United States
Truck has a wet bellhousing so more than likely the seal in the starter is bad...there should also be a gasket between the starter and bellhousing....
  • Posted 7 Nov 2017 19:47
  • Reply by kevin_t
  • Pennsylvania, United States
I should add the oil is not leaking at the mounting flange of the starter but on the back side where the winding's are
  • Posted 7 Nov 2017 06:49
  • Reply by Rebel57
  • California, United States

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