Therefore, the front pump handles everything EXCEPT the hitch; it supplies oil for steering, remotes and lube. Rear (piggyback) pump handles the hitch only under normal operation. That's why it is called the hitch pump. :>)
However, under full system demand, and IF the hitch isn't being used (or has arrived at the end of the hitch piston's travel), the rear pump can/will assist the front pump in it's duties.
But, not the other way around.
So, if yer hitch isn't working right, (everything else is okay) suspect the rear pump. Especially so, since we're talking a tractor that old.
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