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I acquired a '57 Farmall 130 last January. It has a nice running engine, plenty of torque, starts easy! But it has an odd noise while running. There is what sounds like a periodic scrape - scrape - scrape... every 1 - 2 seconds no matter what RPM the engine is turning. Using a stethoscope I pinpointed the source being in the hydraulic pump on the front of the engine. The sound isn't really a "scrape" but a "squirt." It seems the pump develops hydraulic pressure and a relief valve opens mometarily releasing a squirt of fluid into the tube that feeds the touch control box.
Is this normal behavior?

RayJ
 

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I have had no experience with such a noise, and have a 140 and Super As. I strongly suggest you keep an eye on the engine oil level because a faulty hydraulic pump seal can leak oil into the crankcase.
 
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