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catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 2346
Experience:  Field service technician for CAT 19 years.
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I have a cat 312 c excavator and the right side when

Customer Question

I have a cat 312 c excavator and the right side when sprockets are in the back the track has no power what's wrong
Submitted: 1 year ago.
Category: Construction and Road Equipment
Expert:  catmastertech replied 1 year ago.

Your hydraulic swivel (rotary joint) is bypassing internally due to eroded seals.

Remove the swivel and replace all the seals inside it to fix this problem.

Customer: replied 1 year ago.
Can you send me a schematic on what to change and how to do it on changing seals on swivel
Expert:  catmastertech replied 1 year ago.

Here is how it is done for a E110 CAT machine, yours is similar except the joint is installed upside down. The lines group page is more like your machine.

Expert:  catmastertech replied 1 year ago.

The parts are similar to this joint.

Give your dealer the machine serial number to be certain you are getting the correct parts.

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