I have a 1979 Case 580c backhoe that is leaking oil at the top end of the backhoe control valves. (just weeping). Otherwise the hoe works fine - sometimes although the left swing cylinder is 'weak' and requires slight operation of one of the other controls to get power to it.
Choices are to drop the spools (in place on the machine) and put new top and bottom o-rings on, or pull the full unit and have a hydraulic shop do the reseal - including resealing the relief valves and setting the pressures.
Anyone know what the rough cost of a hydraulic shop doing this would be?
Also, what is the process for getting the top spool seals out of the unit? Do they simply pick out easily?
Also saw a post by "fishfighter: from 2014 who did roughly the same work, but he replaced the relief piston's o-rings with the 'white case o-ring'. Can this be done without taking the relief valve out and therefore not having to reset/test its pressure?
Any comments or advice would be greatly appreciated.
I don't want to do this twice....
Thanks in advance.
MBady
Choices are to drop the spools (in place on the machine) and put new top and bottom o-rings on, or pull the full unit and have a hydraulic shop do the reseal - including resealing the relief valves and setting the pressures.
Anyone know what the rough cost of a hydraulic shop doing this would be?
Also, what is the process for getting the top spool seals out of the unit? Do they simply pick out easily?
Also saw a post by "fishfighter: from 2014 who did roughly the same work, but he replaced the relief piston's o-rings with the 'white case o-ring'. Can this be done without taking the relief valve out and therefore not having to reset/test its pressure?
Any comments or advice would be greatly appreciated.
I don't want to do this twice....
Thanks in advance.
MBady