Hydraulics

[ohioC160 1]

I have a 1977 C-160 hydro, hydraulics work sporadically, never know when they will work or not. Changed out trans oil and new filter, I have manuals on Sundstrand transmission, but there is no troubleshooting concerning hydraulic lift. Can anyone help?

[pfrederi 17,887]

Assuming tractor drives normally (good power even when warmed up)  i would suspect the implement relief valve.  The spring may be broken or the ball not seating well.that would preclude generating enough pressure to operate the lift.  (See page 5 and 35 in the manual) Do you have access to apressure gauge that will go up to 1000 psi to run a pressure test???

 

 

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Edited December 27, 2017 by pfrederi

[ohioC160 1]

Thank you! 

I'll consult the manuals again. Mine are repro's - best I could find on net. I do have a gauge and will try a test. Based on your comment, I'd say, assuming the pump is building proper pressure, the relief valve must be sticking open. Do you have a reliable source for parts? Dealers around here are hit and miss on parts.

[pfrederi 17,887]

Try downloading this copy   Check with A to Z tractor in our vendors section here.  For new parts try LJ Fluid Power

 

 

[953 nut 55,837]

1 hour ago, ohioC160 said:

pump is building proper pressure, the relief valve must be sticking open.

     I would agree that if it drives well the relief valve spring is the most likely suspect.        These manuals are another set for Sundstrand. In addition to A-Z and LJ Fluid you may be able to find some parts by contacting member @daveoman1966, he works with them.

Sunstrand Hydro (part 1).pdf

Sunstrand Hydro (part 2).pdf

Sunstrand Hydro (part 3).pdf

Sunstrand Hydro (part 4).pdf

 

[SylvanLakeWH 25,973]

[KC9KAS 4,741]

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