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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Today's Featured Article - History of the Nuffield Tractor: Part 2 - by Anthony West. In February 1953 production of the ETC T.V.O engine started, ready for the March 1953 press announcements. The new TVO engine had a number of improvements which resulted in a 10 per cent more power (43bhp as against 38 bhp on the earlier engine) and 10 per cent more fuel economy. Some of the improvements are listed below: Redesigned combustion chamber, improved spark plugs and positioning, plug size 14mm(earlier size 18mm).
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1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
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