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3.2 Service
In order to function satisfactorily the tractor must be
properly maintained.
The necessary daily lubrication and routine checks,
can, of course, be carried out by the driver.
Where adjustments and repairs are necessary
which require the attention of a qualified mechanic
and the use of special tools, it is advisable to relay
on a workshop. In this case we advice you to
consult your local dealer as to how your tractor
should be looked after as he is in a position to give
you the best possible service. Through service
bulletins and special training courses he is kept
constantly informed of the factory’s
recommendations regarding care of the tractor.
3.2.1. Cost-free service
Before leaving the factory the tractor was thoroughly
tested and adjusted to ensure it is in first-class
condition when delivered to you.
However, it is important that the tractor is given
further checks during the first period of operation.
Bolts must be checked for tightness, various
settings inspected and other minor adjustment
made. Your dealer therefore gives one cost free
service inspection (excluding oil and filter costs)
after 100 hours running.
3.3. Engine
(Please check the Perkins engine manual
)
The tractors have 4 − stroke direct injection diesel
engines
The principle of the turbocharged engine is that
exhaust gases from the engine cylinders drive the
turbo unit which forces air into the cylinders. This
means that a higher power output can be obtained
with economical fuel consumption.
3.4. Power transmission
3.4.1 Clutch
The clutch is of the double type
and is attached to the engine
flywheel. There are separate
discs for the propulsion clutch
and power take − off. Both
clutches are operated
mechanically independently of
each other, the propulsion
clutch being controlled by
means of a pedal and the power take − off clutch
with a lever. The clutch plates are both axel and rad
springed
.
3.4.2. Gearbox
HATTAT tractors have two type of
gearbox(16+8,12+12)The main speed gear are has
four synchronized gears which are controlled with a
speed gear lever. In front of the gearbox there is
fitted a shuttle unit or splitter unit that is changed
according to 16+8 or 12+12.
On models with the shuttle unit the gearbox has
three range gears; LL=creeper range, M=Medium
range and H= High range. M and H ranges are
synchronized. All these three range gears are
controlled with one lever. In the gearbox there are
12 forward speeds and 12 reverse speeds.
On models with the splitter unit the gearbox has two
range gears; L=Low range, H=High range and
R=Reverse speed. Two range speed and R are
controlled with one lever. Two range and R speed
are syncronized.
The gearbox has a common housing with the
differential. Helical gears of the gearbox give a low
noise level and vibration less power transmission.
The gearbox also has pressurized lubrication
provided with an oil filter.
3.4.3. Rear axle
The rear axle is fitted directly to the gearbox.
The differential lock is of the coupling type which is
engaged and disengaged electro − hydraulically. An
indicator lamp on the instrument panel lights up
when the differential lock is engaged.
Final drives are of the planetary gear type. From the
planetary gears power is transmitted to the rear
wheels.
3.4.4. Mechanical Shuttle&Splitter
The shuttle unit is synchronized and has a pressure
lubrication system. The forward reverse shuttle is
controlled with the lever nearest to the driver. For
this reason forward/reverse changing can be made
by stopping the quickly and very easily.
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