David Brown Cropmaster VAK1 Series, Инструкция по эксплуатации и техническому обслуживанию

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OPERATING THE TRACTOR
llriving the Tractor
The David Brown tractor is easy to drive, hut like everything else .it
can he done well or badly. Bad driving increases wear-and-tear and repair
hills and does not save any working time.
Maxims of good driving are :-
Avoid sudden acceleration or braking.
Avoid violent changes in engine speeds.
Apply the least possible force to the controls.
Use the controls at just the right moment.
Starting from rest
Assuming the engine to be running, the gear lever will be in neutral
and the clutch and brakes engaged. Do not choose too high a gear in which
to start-the engine will probably take it, but w var on the clutch is
increased.
When engaging the gear, depress the clutch pedal and hold it down
long enough to ensure that the gearbox primary shaft has come to rest
before moving the gear lever. It may happen once in ten times that the
engaging tee h are " end on " and will not mesh� in this case momentarily
release the clutch pedal and again depress before moving the gear into
mesh.
Before allowing the clutch pedal to ·return, release· the foot brake by
lightly depressing the pedal and the release catch. If starting up-hill,
release the footbrake and the clutch pedal together so that the engine
commences to take up the drive while the brakes are being released.
11
se
of Clutch Pedal
When starting from rest, do not run the engine faster than is necessary.
Except when the clutch is actually being used, keep the foot off the
pedal.
Do not slip the clutch when the engine is labou;ring in the hope that
the tractor will keep going; in such circumstances select _a lower gear.
Do not run the engine with the clutch pedal depressed longer than is
absolutely necessary. Do not, for example, run downhill with the clutch
disengaged.
When using electric starting in cold we�ther declutching will reduce
the load. on the battery.
llse of 6ears
Experience is the best guide to the choice of gears for any particular
requirement, but if the engine is labou ·ing select a lower gear. The engine
is labouring. if its speed is appreciably puHed down by the load, and it
audibly protests.
·
The gearbox is of the sliding-gear type, and gear changing while the
tractor is in motion must be undertaken only by an experienced driver. If a
lower or higher gear is required, the tractor should be brought to a standstill
before it is selected. Gear changing while the tractor is under load
must not
be undertaken.
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