SC Hydraulics Problem - Long

Posted by Skycarp on May 17, 2007 at 18:08:05 from (206.81.147.17):

I hope someone here can help me with my hydraulics problem so
I won’t have to go at it blind.

I am restoring an SC, with fast hitch. I am new to Farmalls and
their hydraulic systems. I have the IH-8 manual and the Blue
Ribbon service manual for the touch control. I have read the
Troubleshooting Test Procedure but do not have a test valve to
check pressures so I do not know if I can follow these test
procedures.

The hydraulics worked fine before the teardown for restoration
so I left that system mostly as it was. I did replace the manifold
tubes from the pump to the remote valve/cylinder block. I used
new O rings at that location. I drained and cleaned out the
cylinder block and installed a replacement filter unit. I did
exterior cosmetics like replace the cylinder boots and actuator
valve boots. I did not open the cylinder block. I did not go into
the hydraulic pump. The pump stayed on the engine as it was.

Now the problem, upon engine startup today for the first time,
with new hi/tran fluid in the hydraulic system, the system
seemed to work as designed for about two minutes. The fast
hitch cylinder operated, the implement arms rotated forward and
rearward. Then everything hydraulics came to a stop. Nothing
works when levers are moved. One rock shaft is forward and
one is rearward. The fast hitch cylinder is in the down position
and does not move when the remote valve is worked. I topped
off the hitran level and worked the control levers for 20 - 30
times. Nothing!

To search out the problem I drained the fluid, took out the filter
and it was clean and not plugged. I took off the manifold tubes
between the pump and the cylinder block and turned over the
engine to see what I could see. Nothing jumped out at me as a
problem.

Do I need to remove the pump and rebuild it? Do I need to take
the cylinder block apart and rebuild it?

Any suggestions to get the hydraulics working would be
appreciated.

Thanks in advance.

Replies:

• Re: SC Hydraulics Problem - Long El Toro 18:37:50 05/17/07 (0)
• Re: SC Hydraulics Problem - Long Janicholson 18:19:32 05/17/07 (0)

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