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FUEL
SHUT-OFF
VALVE
The fuel shut-off valve is located at the center underside of the fuel
tank (see Figure 28). Turn the valve to the right (clockwise) to shut
off the fuel supply to the carburetor. Turn the valve (counterclockwise)
to the stop to allow the fuel to flow. A reserve supply of one gallon
of fuel is maintained when the valve is turned two turns from either
the full open or closed positions. See decal located on underside
of hood.
Drm)
HOURS AT ISTS.
APM
2a.
HURORE
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Figure 6
Figure 7
Proof-Meter
Proof-Meter
Mode! 640
Models 650, 660, 850, 860
PROOF-METER
The Ford Tractor Proof-Meter, conveniently located at the top center of
the instrument panel, is actually five instruments in one. Ata quick glance,
it tells you the engine speed, tractor ground speed, P.T.O. speed, belt
pulley F.P.M. and hours worked. The separate functions of the Proof-
Meter are described in the following paragraphs and illustrations.
Engine Speed: Engine revolutions per minute
(R.P.M.) are shown in
hundreds on the outer band of the Proof-Meter as the long needle
moves from 0 to 24. Knowing the correct engine speed is helpful in
checking correct oil pressure and maintaining the proper engine idle
speed.
10
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