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I’ve seen it before, but on trucks not tractors or earthmoving equipment. It was attributable to a slightly unbalanced fan assembly that created harmonics above an acceptable level. But I don’t think that’s your case. You could put your fan hub on a bubble balancer for a rough check though.
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Bob since I see you are looking here ……….
Apparently Arthur’s issues aren’t a big priority, so waiting for a response from him is like watching paint dry.
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Bob since I see you are looking here when you change out coolant do you fool with adding a can of water pump lubricant ? I do not see it on store shelves like you used to see.
It’s like snake oil anymore. Modern coolants have lubricity formulated into them, and the seals nowadays are mechanical carbon/ceramic not the lip type that fail from microscopic debris in the system. That said, if your coolant pump has a zerk fitting or uses a packing gland, it wouldn’t hurt.
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That picture you posted is the pressure relief valve that is attached to the direction control valve with U-bolts. That is where you can adjust the pressure.
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I’m thinking one of two things, or a combination of both.
1) You aren’t pausing in neutral before shifting from forward to reverse, causing a pressure spike. Do you know if your accumulator is working properly? This should absorb any pressure spikes.
2) Set your relief valve pressure to 40 psig.
Trying to figure out what question you were asking about trying to identify a part. Where is pic?
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Some tractors have the tach wired off the alternator, others use a magnetic pick up on the flywheel housing.
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The black wire is a ground wire. Did you remove the wires without putting labels on them?
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Arthur, are you having problems posting pictures, or have you figured out what the mystery part was?
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