Posted by charles todd on June 08, 2011 at 21:00:27 from (205.242.95.137):
In Reply to: 504 power steering posted by old mack on June 08, 2011 at 16:07:42:
Whining hydraulics sound like possibly air in the system , plugged filters, or the steering flow divider is not set right.
All references are row crop Farmall 504.
Air in system. Check level. There is an 1/8" pipe plug by the clutch pedal. Remove this and fill through the 1" pipe plug by the shifter or the large ORB plug over the IPTO until oil flows out the 1/8" port.
Plugged filters. Remove the oval plate below and in front of the brake pedals. This is where the hydraulic filters are. If it has the old school twin donuts you need to up grade. There is an IH filter that replaces this or an after market high capacity extension that uses a modern IH filter. Here is the address, I have one.
Flow divider. There is a 3 port valve under the white hood skirt on the left side (visible). There is a threaded needle valve with a roll pin through it. You can screw this in or out to vary the amount of oil to the steering. NORMALLY this is only to set the flow amount after changing a pump or filter or in COLD weather. This would be a last resort (use penetrating oil prior to adjusting or you will break the roll pin).
Place a jack under the front end and raise the tires off the ground. Turn the wheel side to side. Chances are plugged filters made you loose prime or the suction tube is leaking.
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