93' 7753

[K-dawg]

I have issues with my old 7753 . I was loosing hydraulic fluid , but no oil leaks to be seen anywhere . Add more oil , within 10 min or less its gone and machine won't move . So far I have added close to 12gal to get the machine moved back to the road to get it loaded . I'm told by a mechanic that it's likely a " carrier bearing seal " ??? from that I asssume that all the hyd oil is leaking into the drive chain case , hence no visible leaks . Has anyone had this type of problem ?

 

[Tazza]

Lots of people have this problem.
If you remove the front plug, oil should pour out. It should be level with the fill plugs lower threads.
Check/clean/replace the case drain filters. They are alloy cylinders that are inline with the small hoses that come off the drive motors. If they get plugged they will cause higher case drain pressure and it will be pushed into the chain case.
Now, the seals. You remove the drive motors, what you see on the chain case is the motor carrier. There is a seal that seals the shaft that the drive motor drives. This is where the oil leaks past. You can drill small holes in it and screw self tapping screws into it and lever out with pliers.

 

[Bobcatdan]

Lots of people have this problem.
If you remove the front plug, oil should pour out. It should be level with the fill plugs lower threads.
Check/clean/replace the case drain filters. They are alloy cylinders that are inline with the small hoses that come off the drive motors. If they get plugged they will cause higher case drain pressure and it will be pushed into the chain case.
Now, the seals. You remove the drive motors, what you see on the chain case is the motor carrier. There is a seal that seals the shaft that the drive motor drives. This is where the oil leaks past. You can drill small holes in it and screw self tapping screws into it and lever out with pliers.

If you are going threw that much oil that fast, the chain case has to be plum full by now. If it is dumping that bad, the bearings are almost going to be out. Have you flipped thc ab yet? Ihave seen these machine hold a lot of oil and leak a drop due to being pretty packed with dirt. Normally oil lost that fast is a pump to valve hose.