zlssefi
Senior Member
Thank you Mark!!!! I am going to print this and bring it next door and try to get an answer on this. Much appreciated!
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Cat 268B Hydraulic/throttle up problem
- Thread starter zlssefi
- Start date
zlssefi
Senior Member
I have an update on this machine. Today the mechanic removed the work pump from the machine and found the actuating piston in the pump to have a sealing ring that got knocked off, and was wrapped around the spring that is below it. When the ring came out of its retaining groove it scored the wall of the bore where the actuating piston seals/rides. A bearing repair sleeve is going to be installed to repair the bore and will be reassembled. thank you very much for your help so far!
zlssefi
Senior Member
Bingo! a machine shop repaired the bore, the piston and ring were reinstalled and the pump now makes 300 psi at idle instead of 2700. Thank you all!
Gerry Green Jeans
Member
This is wonderful info for me! I have a 248B doing the same thing. Are the ports and lines the same?
zlssefi
Senior Member
its tough to remember that far back.....but as i recall everything was pipe thread on the gauges and lines.
Gerry Green Jeans
Member
Thanks very much. I think I am going to pull the engine out and do some rebuilding? Any tricks I oughta be aware of on that Z?