580B CK oil contaminated

[Husker67NE]

I have a 1974 Case 580B CK backhoe with a diesel engine. It is shuttle shift design and works in both forward and reverse but lacks power. The power improves after servicing but not to what I feel is right, it struggles on a small incline. The torque tube, hydraulic and transmission oils always get contaminated after being serviced. I have flushed all the systems at each service and they will be good for a couple weeks but start discoloring. Covering the backhoe delays the contamination but doesn’t stop it. Where should I look for the entry point causing this, I don’t see where these 3 inter-connect so there must be multiple locations.

Thanks for any assistance given.

 

[Tinkerer]

What gear are you using on those small inclines ?
Got a cab on it or an open ROPS ?
The gear shift boot is a common entry point for water.

 

[Husker67NE]

I try in 2nd gear and it crawls up. It is an open ROPS. Can water get in even if the boot isn’t cracked or torn?

 

[Husker67NE]

How does water get from the transmission into the torque tube and hydraulics?

 

[Tinkerer]

If the boot fits tight around the lever there is little chance of water getting past it.
Was the tractor in a flood at some time in the past ?
2nd gear ?? ---> The torque convertor may be defective. There are ways to check it.
How strong is it in reverse ?
Do you have the service manual for it ?

 

[Husker67NE]

I had a digital copy until my computer crashed and haven't been able to find a good copy of one. The boot doesn't move when I twist it so I'm pretty sure its tight. I haven't found any holes in it either. Torque converter? I don't remember seeing one when I last had the tractor split.

 

[Husker67NE]

The reverse is good but has power loss in second as well, not as noticeable. How can I check the torque converter?

 

[Tinkerer]

No torque convertor if you have a clutch.
Send me your email address in a private conversation and I will give you download access for the service manual from my Google Drive.