Leaking/Weeping From Hydraulic Pump to Front Cover

[dieselscout80]

All, I noticed I my TC45DA is leaking/weeping hydraulic fluid.

It looks like it’s leaking where the hydraulic pump bolts to the front cover of the engine and it’s not engine oil.

Is there a chance that the hydraulic pump is just loos and that tightening the bolts will slow or stop the flow?

I will post a picture tomorrow.

 

[Hay Dude]

Great (and free) place to start. I’d be breaking out the sockets and tightening.

 

[oldnslo]

I would be careful tightening those bolts. To tight may bind up the pump.

 

[Hay Dude]

Sounds like gasket failure….

 

[Harry in Ky]

I don't mean to offend, but I think you should take another look at the pump. Maybe clean it off a little better and look again in better lighting.

I don't see any way hydraulic oil can leak from between the pump mounting flange and the timing cover. There is no hydraulic oil at that point. If there were it would be in the motor before you would see it on the outside. If you see hydraulic fluid it's more likely coming from the pump body seals.

New Holland Agriculture | Schematic, Manuals, Specifications and Diagrams for hydraulic oil pump | MyCNHi US Store

Find schematics, manuals, specifications and diagrams for HYDRAULIC OIL PUMP. Find genuine OEM parts for your needs.

www.mycnhistore.com

 

[dieselscout80]

Could be I just noticed it as I was walking by saturday.

 

[dieselscout80]

Here’s a picture of the leak.

 

[JC-jetro]

If the pump shaft seal that is a "double lip seal with spring" is leaking then no tightening will help out. I would worry about jumping out and start tightening things. Pump case tightening has very little to do with the seal. If it were my rig, I would then clean the area to the best of my ability. I would turn the tractor on and push the pump a bit by manipulating either 3 point or loader bucket just a bit passed max to cause the pressure relief to pop. I would only do it for a few lil seconds.Put a card board under and keep checking. one thing to remember pump shaft seal leakage will go to the timing gear cover and you may not be able to see that clearly. I would just not hurry, losing a bit of hyd fluid may be manageable. Make sure to check hyd fluid reservoir level by checking the dipstick.

 

[dieselscout80]

Does the pump just un-bolt and pull out/off so I can access/R&R the seal?

That’s how the R&R of the hydraulic pump on my IH 424 worked.

 

[Harry in Ky]

What you pictured is not a shaft seal leak, and that's not your hydraulic pump. It's the steering pump. Whatever you do with the hydraulics (other than steering) won't influence that leak at all.

Power Steering Pump Assembly | New Holland Agriculture | MyCNH US Store

Find schematics, manuals, specifications and diagrams for POWER STEERING PUMP ASSEMBLY. Find genuine OEM parts for your needs.

www.mycnhistore.com

 

[dieselscout80]

What you pictured is not a shaft seal leak, and that's not your hydraulic pump. It's the steering pump. Whatever you do with the hydraulics (other than steering) won't influence that leak at all.

Power Steering Pump Assembly | New Holland Agriculture | MyCNH US Store

Find schematics, manuals, specifications and diagrams for POWER STEERING PUMP ASSEMBLY. Find genuine OEM parts for your needs.

www.mycnhistore.com

When I looked at the parts page linked to above I realized that it is the power steering pump.

 

[Harry in Ky]

Do you also see the leak is the body seal, nothing to do with the shaft seal? It's really doing you no harm (yet). Just keep and eye on the steering oil level until you have time to deal with it.

 

[dieselscout80]

Well it is just the power steering low pressure / return hose.

The hose part number is 86400360.

It’s HYDRAULIC HOSE (SAE J30R7) with 15.88 mm ID x 70.00 mm.

I think it’s going to be a local purchase item as it’s $26.78 plus shipping.

 

[mojoinco]

I'd look above for a leak dripping down (follow the dirt). Whatever it is, it doesn't look like a huge issue. Might be just a loose fitting above, or spilled oil (not familiar with that machine).Degrease that area, then monitor it. After cleaning and using it a couple of hours, find something to put on it (sawdust, flour, corn starch, etc), let it sit for a bit, then lightly blow off the extra fluff. You'll find a leak if there is one.

 

[dieselscout80]

I'd look above for a leak dripping down (follow the dirt). Whatever it is, it doesn't look like a huge issue. Might be just a loose fitting above, or spilled oil (not familiar with that machine).Degrease that area, then monitor it. After cleaning and using it a couple of hours, find something to put on it (sawdust, flour, corn starch, etc), let it sit for a bit, then lightly blow off the extra fluff. You'll find a leak if there is one.

I have already degreased it and is clear that the short piece of hose in this case is the leak.

 

[mojoinco]

Now, about that Scout 80 -- which diesel?

 

[dieselscout80]

It’s a 1980 Scout II with the Nissan SD33TD which is what it came with, but now it has an air force tug SD33 now.

 

[mojoinco]

It’s a 1980 Scout II with the Nissan SD33TD which is what it came with, but now it has an air force tug SD33 now.

Ah, I saw Scout 80, vs 800.

 

[dieselscout80]

Well I swapped the hose out with some 5/8” power steering return hose from Napa and no more leaking well just sitting here not running.

It’s radiator has been at a shop for three weeks and had nothing done accept putting it a cleaning tank.

I went and got it yesterday and took it to another place and he said to it will be ready in a week.

 

[dieselscout80]

I have run my TC45DA with the new hose several times now with no leakage.

One other thing I did is I replace the spring clamp with a worm drive hose clamp on the hose coming down out of the power steering reservoir and that stop another drip on to a fuel injector line.