L175 Coolant leak under fuel filter.

[moovinpixels]

Early 70s L175 has what seems like coolant leaking out of the bottom hole. AI says it's a port for drainage for when the fuel pump fails. just wanted a second opinion.
Thanks
Sid

 

[Russell King]

Well first off I say AI is not super on this answer.

If the tank is above the injection pump (which I think it is) there is not any fuel pump unless someone has installed one for some reason. Then the fuel pump would probably drain into the engine crank case if it did fail. And that picture shows an area that is outside the engine crankcase, it is in the clutch area. And the coolant system has no pump other than natural thermosiphon action. So there is probably no way that coolant should be coming out of that area unless something like a “freeze plug” has failed at the rear of the engine.

So first which of the three holes in that picture is really leaking fluid. I don’t think the top and bottom holes actually go through and are for mounting some implement (snow plow/front blade/front end loader?). The hole with the tear shaped cover is for putting grease in the throw out bearing carrier sleeve seeing timing marks and goes through the wall.

Secondly, you need to figure out what fluid it is. Check the engine oil level to see if it is over full. The hydraulic pump has a seal where it enters the engine crankcase so if that fails hydraulic fluid will be pumped into the engine oil crankcase. That could be leaking past the rear main seal and then filling the clutch bell housing. There is probably a drain port on the bottom of the bell housing that may be plugged somehow but is probably supposed to be open. I would get a drain pan and crawl underneath the tractor and see if you can locate the drain hole and clean it out. Be careful, the engine oil drain(s) and the transmission sump drains are all in that same general area but should be easily identified.

I guess another fluid that could be leaking into that area is the transmission fluid. It would be leaking past through the seals at the front of the gear case.

Good luck.

Edit - corrected the description of the teardrop covered hole.

 

[moovinpixels]

Well first off I say AI is not super on this answer.

If the tank is above the injection pump (which I think it is) there is not any fuel pump unless someone has installed one for some reason. Then the fuel pump would probably drain into the engine crank case if it did fail. And that picture shows an area that is outside the engine crankcase, it is in the clutch area. And the coolant system has no pump other than natural thermosiphon action. So there is probably no way that coolant should be coming out of that area unless something like a “freeze plug” has failed at the rear of the engine.

So first which of the three holes in that picture is really leaking fluid. I don’t think the top and bottom holes actually go through and are for mounting some implement (snow plow/front blade/front end loader?). The hole with the tear shaped cover is for putting grease in the throw out bearing carrier sleeve and goes through the wall.

Secondly, you need to figure out what fluid it is. Check the engine oil level to see if it is over full. The hydraulic pump has a seal where it enters the engine crankcase so if that fails hydraulic fluid will be pumped into the engine oil crankcase. That could be leaking past the rear main seal and then filling the clutch bell housing. There is probably a drain port on the bottom of the bell housing that may be plugged somehow but is probably supposed to be open. I would get a drain pan and crawl underneath the tractor and see if you can locate the drain hole and clean it out. Be careful, the engine oil drain(s) and the transmission sump drains are all in that same general area but should be easily identified.

I guess another fluid that could be leaking into that area is the transmission fluid. It would be leaking past through the seals at the front of the gear case.

Good luck.

Thanks for the reply. It seems like it is a weep hole for the bell housing. Just went thru a hurricane so maybe excess water got in there. If pressure plates are wet thinking about maybe using brake cleaner to displace moisture.
Thanks again.

 

[Bee-Positive]

The hole with the tear shaped cover is for putting grease in the throw out bearing carrier sleeve and goes through the wall.

Isn't that the Timing Window? Am I looking in the wrong place - or does it severe both functions?

 

[Russell King]

Isn't that the Timing Window? Am I looking in the wrong place - or does it severe both functions?


View attachment 180452 View attachment 180453

I believe you are correct on the L175…. On my L185 the grease port is on that side so I got confused. And I think on my tractor the timing mark is on that same side and spot.

Sorry for the confusion and I will edit my post above.

 

[North Idaho Wolfman]

Thanks for the reply. It seems like it is a weep hole for the bell housing. Just went thru a hurricane so maybe excess water got in there. If pressure plates are wet thinking about maybe using brake cleaner to displace moisture.
Thanks again.

NO!

First: You need to block the clutch pedal fully down or you will sieze the clutch plate to the pressure plate and the flywheel.
Do this all the time till it's fixed!
Second: If it's just water you need to get it out. if it's collant you need to split the tractor.
In either case you need to get the covers off the side (#16/#17 first pic) to get air into the clutch housing.
Try removing plug (#32 first pic) and see if that is a drain for the clutch housing, I'm not sure about that plug.
Also remove (#35 second pic). Put a shop vac hose on blow into the hole left by (#16/ #17) and let it run for a long time to dry it out.

If you don't do this you will have a whole heap of issues.
DO NOT spray brake parts cleaner in there, if anything you would use WD40, but it would take a whole lot of it.

You really need to split the tractor and reseal all of the clutch housing as water should not be able to get in there ever.