PTO Leak

[Chad A]

I have a leak on the PTO bottom fitting. It is leaking a lot. Makes me think it is a seal as it went from no very minor leak to a constant pour. 
 

What do I need to do to fix this? How much hydraulic fluid am I going to spill out of the system? Anything else I should know before I get into this and make a huge mess?

 

Top picture is of Pto and bottom hose with leak. 
Bottom picture is of the actual leak by the fitting. 
 

Thanks in advance to the most knowledgeable crew around. 

The top picture is upside down, sorry. 

[Jdw12345]

Looks to me as though the o-ring on the fitting the screws into the pump is all that my be the issue, again, it looks like it is the problem, I would start be trying to tighten the fitting and see what happens, jmo

[vito.a]

I had a leak there also.  I had to clean everything well.  I raised the air suspension up and placed jack stands under the rear crossmember.  Then started the engine and watched for the exact spot it was leaking.  Mine turned out to be the small rubber hoses going from the trans to the PTO had rubbed through.  I had new lines made up.

I also had a leak where the hydraulic pump bolts to the PTO.  I used a double gasket and The Right Stuff gasket sealer to seal it.  

Edited August 2, 2023 by vito.a

[Chad A]

I am 100% sure it is leaking from around that fitting as I wiped it all clean and then watched it as it started weeping again. 
 

If I have to take that fitting off what can I expect as far as fluid coming out?

 

Thank you 

[Jdw12345]

I think I might try to tighten it up a bit, don’t get too aggressive with it, that washer just compresses a o-ring, use two wrenches , one to hold the elbow and one to tighten the nut, so I’d start with that and see what happens. I assumed it was hydraulic fluid based on the color, jmo. If you’ve never changed your hydraulic fluid now would be the time! Remove the hose, slowly, and see how much you lose, probably not that much. Just have a couple gallon bucket ready to use. Jmo.

Edited August 2, 2023 by Jdw12345

[Chad A]

Update. 
 

Got under there with a wrench. The fitting was finger tight. I turned it about a half of a turn and it is snug. I suspect the o ring blew out of it but I am going to see if tightening it up worked. 
 

I will detail progress later this week. 

[Robert92867]

I pulled my pump a couple days ago. Drained about a gallon of ATF from the reservoir/filter and hoses. Yours may be more, as I don't have a side radiator.

[Chad A]

Thank you for the pic Bob. I am still leaking, although considerably less. What size is the gasket? Is it an o ring or a special gasket?

Thanks in advance. 

[Jdw12345]

If you tightened the fitting and not the nut it may still leak, that’s why I said to use two wrenches, hold the fitting and tighten the nut, if you have not already, you may only need a new o-ring.

[Chad A]

I tightened the nut. 

[Jdw12345]

Ok, I misunderstood your post then, sorry.

 Probably needs an o-ring then. 

[Chad A]

Jeff, you bring up a good point as I reread my post. 
 

Does the fitting need to be tight into the Pto box and then the nut also tight? How would you make the threaded fitting tight as I don’t know how it could move because of the stiff hydraulic hose attached to it?

Does the o ring or gasket seal the threads on the fitting?

[Robert92867]

The hose unscrews. Allowing you to unscrew the fitting.  That allows you to inspect the O-ring, and the 37 degree flare face, and the threads in the aluminum pump base.  The flare should not be marred.  The threads screwing into the pump are not tapered, the seal is the O-ring. have a bucket ready to catch the ATF.