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Posted by sixbales on Saturday, April 07, 2018:

In Reply to: 4600su power steering problem posted by Paul Egelston on Friday, April 06, 2018:

Re: 4600su power steering problem

Howdy Paul, welcome to the SSB tractor forum.

Regarding the speedi sleeve installation, some guys put epoxy between the sleeve and shaft to fill in irregularities (pitting/groove/etc.) to prevent leakage from underneath the sleeve. You will have to allow epoxy to cure for 24 hrs.

I will attempt to upload a New Holland parts diagram, but have had problems in the past with this....compatibility problems I presume. If this fails to upload, go to the "Official New Holland Online Parts Store" on the internet. Enter 4600SU as your model and search. Go into the front axle & steering section and click on the pump diagram.

See item #26....reservoir vent valve assy. Could be a plugged reservoir vent causing pressure problems?

See item #24....filter plugged?

See item #15......relief valve (650 psi).

To check your pump pressure, "tee" into your pump pressure line and install a 1000 psi gauge. Turn the steering wheel up against a lock (full left or right turn) to energize your relief valve. Your pressure should read between 600 psi and 700 psi. You will need a manual to learn how the adjust your relief valve pressure setting, if it is off significantly.

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