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Case 580k oil pan find

Joined
Jan 12, 2021
Messages
6
Location
Guam
I'm attempting to get an old Case 580k running again. It has the naturally aspirated Cummins 4-390. After dropping the oil pan this morning, I found what appears to be a thrust bearing in the bottom of the pan. Is this a thrust bearing?20210123_123525.jpg
 

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Vetech63

Senior Member
Joined
Aug 10, 2016
Messages
6,412
Location
Oklahoma
Dang! I'm not really experienced with engines. Does this mean I need to replace all of the bearings then?
You can start by removing the thrust cap and inspecting what's left of the thrust bearing. Check the crankshaft where the thrust rides for scoring. I would remove each cap and check every bearing if it were my engine. You can take pics of the bearings and post them here if you arent sure of the condition.
 

Bluox

Senior Member
Joined
Jun 19, 2010
Messages
1,960
Location
WA state
As I recall the thrust bearing is a one piece bearing shell that fits in the block above number 4 main cap that won't have a thrust bearing on it.
Not that uncommon for the flex plate or clutch to take out the thrust bearing.
Good luck
Bob
 
Joined
Jan 12, 2021
Messages
6
Location
Guam
I'm curious as to what brought your attention that led you to that unfortunate find.
How long do you think you may have run it with the broken bearing ?
I ask this because the flex plate on the torque convertor may be badly damaged as result of the crankshaft moving back and forth.
The backhoe was free. It had been sitting in a yard, last run about 10 years ago. The only history the prior owner could give was that it ran when parked, the hydraulics worked, but it would not drive. I'm attempting to get it operating again for as little cost as possible for the current owner. When I drained the oil pan, about 3 gallons of clear water and 5 gallons of black oil came out with sludge. I dropped the pan and found the bearing.
 
Joined
Jan 12, 2021
Messages
6
Location
Guam
As I recall the thrust bearing is a one piece bearing shell that fits in the block above number 4 main cap that won't have a thrust bearing on it.
Not that uncommon for the flex plate or clutch to take out the thrust bearing.
Good luck
Bob
Thank you!
 
Joined
Jan 12, 2021
Messages
6
Location
Guam
Is there a tech manual or overhaul guide for this engine that I could read? I'm a pretty good submarine mechanic, but have almost no experience in commercial equipment.
 
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