Belarus 3522.5, Operator'S Manual

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3522.5-0000010
РЭ
49
2.13.2 Shifting of gears inside gearbox
Gears are shifted by means of a joystick 6 (figure 2.13.1). The engaged gear is indi-
cated by “0” gear annunciator 28 (figure 2.13.4) and respective segments of the annuncia-
tor 6 and also by a digital indicator 7, all of them are installed in CECS.
In initial position when the operator sets the starter and instruments switch into posi-
tion “”I” - the instruments are on”; all gears are disengaged. On CECS front panel “0” gear
annunciator 28 is lighted, also “0” digit is displayed on the digital indicator 7. This testifies
that supply voltage comes into the system of gear switching and the system does not out-
put a pilot signal to any of electromagnets of gearshift electrohydraulic valves. After the
engine has been started transmission hydraulic system pump is activated. “0” gear indica-
tion remains.
To start movement, before choosing a required gear, it is necessary to engage the
selected range of the gearbox by means of the range shifting lever 1 (figure 2.13.1), hav-
ing preliminary activated the “braking” mode, as specified in subsection 2.13.1 “Switching
of gearbox ranges”.
After the desired range has been engaged, gears are shifted without power flow in-
terruption by means of the joystick 6, except when exiting the condition “Gears are disen-
gaged”. On forward travel exiting the condition “Gears are disengaged” (“0” gear) is al-
lowed only with the clutch pedal depressed against the stop (the sensor of disengaged
clutch on forward travel goes off), and on reverse travel – with the reverse post clutch
pedal depressed against the stop (the sensor of disengaged clutch on reverse travel goes
off). Sequential pressing the joystick handle against the stop forward ensures sequential
gear shifting in direction of increasing (each pressing forward against the stop – plus one
gear). Sequential pressing the joystick handle against the stop backward ensures sequen-
tial gear shifting in direction of decreasing (each pressing backward against the stop – mi-
nus one gear). Quick shifting from any gear to the position “Gears are disengaged” (“0”
gear) is carried out by moving the joystick 6 to the left against the stop. Moving the handle
of the joystick 6 to the right against the stop and holding it in this position for more than two
seconds ensures “remembering” of the gear selected. Repeated pushing the handle of the
joystick 6 to the right against the stop with the clutch fully depressed calls-up the “remem-
bered” gear (for example, this allows to engage the remembered gear directly from the
condition of “0” gear). Operation principle of indication of the selected gear is given in sub-
section 2.13.4 “CECS”.
ATTENTION: GEAR SHIFTING WITHIN ONE RANGE IS ALLOWED ON MOVING
TRACTOR WITHOUT DEPRESSING THE CLUTCH PEDAL!
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