As long as the pressure relief valve is opening, it will only affect the steering. Its purpose is to limit the maximum pressure to the steering. The steering system gets priority on the MCV pump flow but unless the steering is held against the stops, the flow bypasses the relief valve and pressure is controlled by the regulator valve in the MCV assembly. Excess flow from the regulator valve is routed to the TA lube and again regulated by the lube pressure regulator valve.
Since your problem is not constant you may want to check to see if the orifice is loose in the MCV valve. It is accessed through the port in the rear of the MCV that has a 5/8 inch hex plug. An orifice that is out of place can cause the flow to vary in the MCV circuits.
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Today's Featured Article - Tractor Traction - by Chris Pratt. Our first bout with traction problems came when cultivatin with our Massey-Harris Pony. Up till then, this tractor had been running a corn grinder and pulling a trailer. It had new unfilled rear tires and no wheel weights. The garden was already sprouting when we hooked up the mid-mount shovel cultivators to the Pony. The seed bed was soft enough that the rear end would spin and slowly work its way to the downhill side of the gardens slight incline. From this, we learned our lesson sinc
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