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••OR.OPMASTER'' SERIES V AG/IU
The specification of the David Brown "Cropmaster" VAG/IC Series
is substantially the same as the V AK/IC Series model given in this
instruction book except that the engine is designed to run on petrol instead
of T.V.O. and is, therefore, provided with a petrol manifold, fuel pump and
high compression pistons.
In the following special instructions, the correct procedure for
operating the Cropmaster petrol engine is given. Strict observance of this
will ensure easy starting and economical running.
FUEL SYSTEM
Fuel Change-over Cocl,
The fuel cock is at the right-hand side of the fuel tank stand.
Reference to T.V.O. should he disregarded. Fuel tap positions are as
follows :-Forward, l\lain Tank; Rear, Reserve Tank; Mid Position,
"OFF."
Fuel Pump
A fuel pump is mounted on the off-side of the cylinder block. To
prime• the carburettor, cepre3s and release the fuel pump priming lever
several times, until the slight normal resistance ceases, when the lever
should not he operated further.
A strainer is incorporated in the fuel pump and is accessible after
removing the domed cover. It should be cleaned in a similar manner to
the strainer in the carburettor elbow. The brass plug at the side of the
fuel pump should he removed and the sludge in the sediment chamber
cleaned out with a soft brush. Examine the cork washer under the domed
cover and if not perfect, fit new washer.
Check inlet and outlet unions
for leaks.
Should the pump fail to function after the above points have been
checked, consult a David Brown dealer.
PAGE
46
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