With the introduction of the 1953 Jubilee tractor Ford began using a camshaft driven hydraulic pump which
it proudly hailed as "live hydraulics" - a significant improvement over teh PTO driven belly pump used on the earlier
N-series tractors. The first generation of tractors with live hydraulics used a vane type Vicker's pump specially made for
the Jubilee. and sometime in the late fifties the vane type pump was superseded by a piston type pump.
OEM pumps of both types have become a major maintenance issue with the NAA, Hundred, and early Thosand series tractors and
often fail to maintain prime and/or fail to produce full output pressure and flow. Because service parts are no longer available
for the older vane type pump the only recourse for servicing them has been to replace the pump with a rebuilt piston pump.
Doing so also requires replacement of the hydraulic lines or hydraulic manifold going to the rear of the tractor and finding
the proper parts can be both difficult and expensive. In addition a professionally rebuilt piston pump typically sells for
well upwards of $500 and just the parts for a DIY rebuild costs $200.
With these issues in mind Windy
Ridge Farm and Machine has designed a conversion kit which replaces either style OEM pump with an inexpensive industry standard
gear pump. The replacement gear pump has a displacement of .55 cubic inches and produces 4.2 GPM at 2000 engine RPM. The conversion
is a simple bolt on replacement. After removng the old pump from the tractor the proofmeter drive, camshaft drive gear, and
gear housing are removed from teh OEM pump and reinstalled on the gear pump adapter. The entire conversion can be done in
about an hour using just a few common hand tools.
The conversion kits cost $350 and comes with a new gear pump, a pump mounting adapter, and all hydraulic hoses and fittings
needed to connect the gear pump to the existing hydraulic lines or manifold on the tractor.
Ford NAA fitted with a vane pump conversion