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(vii) Allow the leaf spring to move forward by moving the stop/run
lever to the 'RUN' position until the step is resting on the over-
load stop cam. Measure the distance (X) again.
(viii) The movement of the leaf spring (X Y) must be 14.0-15.0 mm.
This may be set by readjusting the overload stop cam as
mentioned in (iv) above.
(ix) Reassemble the engine.
(x) Time the fuel pump.
(xi) Run the engine for approximately 20 minutes at its rated speed,
as shown on the engine nameplate, on as much load as
possible without causing smoke, to bring the engine to its
working temperature.
(xii) Remove the load and adjust the speed control (see 'To adjust
speed control')
Recheck the overload stop setting by accelerating the engine
(xiii)
from idling to full speed as quickly as possible, without load, and
watching for exhaust smoke If smoke occurs, move the overload
stop cam in a CLOCKWISE direction by a small amount, and
repeat the acceleration test Repeat the procedure until no
smoke occurs.NOTE Variable speed engines and some fixed
speed engines are fitted with special fuel injection pumps Quote
the type required when ordering new pumps. (See Parts List
Plate N )
77. To time fuel injection pump (Fig. 14 & 17)
(a) Drain the fuel tank and remove the pump-to-injector fuel pipe
(b) To set stop/run controls
(i) On AB1W fixed speed engines running at 3000 rev/min and
below, and on all AC1W engines, move the stop/run lever to the
'RUN' position, ie . horizontal
(ii) On AB1W fixed speed engines running at speeds above 3000
rev/min. and on AB1W variable speed engines, move the
Stop/run lever towards the 'STOP' position, i.e . vertical, and fix
46
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