892-0000010B OM
96
In the range gear unit of the gearbox, the neutral position of drive gear of the I
st
pass
of gear unit 24 is not available, therefore, in the range gearbox, either the I
st
or II
nd
pass is
always on.
To engage the 1st or 2nd forward or reverse speed, the operator should move gear-
box control lever 9 (Figure 3.3.2) to the rightmost position - the position of low speeds and
reverse. Further, to engage the 1st or 2nd forward speed, the operator should move gearbox
control lever 9 forward. In this case, gear lever 4, acting on the yoke slide of the I
st
speed
and reverse, moves yoke 20 back. Sliding gear of the I
st
speed and reverse 26, controlled
by yoke 20, engages with driven gear of the 4th and 7th speeds 27 (Figure 3.3.1), and the
power flow in the gearbox is transmitted to intermediate shaft 32 of the gearbox through
gears 5, 25, 25 (Figure 3.3.2), 26 and 27 (Figure 3.3.1).
To engage the 1st or 2nd reverse speeds, the operator should move gearbox control
lever 9 (Figure 3.3.2) backwards in the low speed and reverse position. In this case, gear
lever 4 (Figure 3.3.2), acting on the yoke slide of the 1st speed and reverse, moves yoke 20
forward. Sliding gear of the I
st
speed and reverse 26, controlled by yoke 20, engages with
intermediate reverse gear 15, which is in constant mesh with the smaller toothed rim of the
two-rim gear of the 5th and 8th speeds 28 (Figure 3.3.1). In reverse gear, the power flow in
the gearbox is transmitted to intermediate shaft 32 of the gearbox through gears 5, 25, 25
(Figure 3.3.2), 26, 15 and 28 (Figure 3.3.1).
To engage the 3rd and 6th or 9th speeds, the operator should move gearbox control
lever 9 (Figure 3.3.2) in the position for these speeds. Then, to engage the 3rd (6th) speeds,
the operator should move gearbox control lever 9 in the given speed position backwards. In
this case, gear lever 4, acting on the yoke slide of the 3rd and 6th speeds, moves yoke 21
forward. Sliding gear of the 3rd and 6th speeds 5 (Figure 3.3.1), controlled by yoke 21,
engages with driven gear of the 3rd and 6th speeds 26. Through the resulting engagement,
the power flow is transmitted to intermediate shaft 32 of the gearbox.
To engage the 9th (direct) speed, the operator should move gearbox control lever 9
(Figure 3.3.2) forward from the position of the 3rd (6th) and 9th speeds. In this case, gear
lever 4, acting on the yoke slide of the 3rd and 6th speeds, moves yoke 21 backwards.
Sliding gear of the 3rd and 6th speeds 5 (Figure 3.3.1), controlled by yoke 21, engages with
the inner toothed rim of secondary shaft 6, interconnecting primary 34a and secondary 6
shafts rigidly. In the 9th (direct) speed, power flow is passes through the gearbox without
transformation.
The 9th (direct) speed should be engaged with the II
nd
pass of the range gear unit
turned on. This will avoid an increased noise level in the gearbox, since the idle speed of
intermediate shaft 32 is lower in the II
nd
pass of the gear unit than in its I
st
pass.
To engage the 4
th
(7
th
) or 5
th
(8
th
) speeds, the operator should move gearbox control
lever 9 (Figure 3.3.2) in the position for these speeds. Then, to engage the 4
th
or 7
th
speeds,
the operator should move gearbox control lever 9 in the given speed position forward. In this
case, gear lever 4, acting on the yoke slide of the 4
th
and 5
th
speeds, moves yoke 12 and a
set of drive gears of the 4
th
and 5
th
speeds 1 (Figure 3.3.1) backwards. The smaller toothed
rim of gear set 1 engages with driven gear of the 4
th
and 7
th
speeds 27. Through the resulting
engagement, the power flow is transmitted to intermediate shaft 32 of the gearbox from
primary shaft 34a.
To engage the 5
th
or 8
th
speeds, the operator should move gearbox control lever 9
(Figure 3.3.2) backwards in the position of these speeds. In this case, gear lever 4, acting
on the yoke slide of the 4
th
and 5
th
speeds, moves yoke 12 and a set of drive gears of the
4
th
and 5
th
speeds 1 (Figure 3.3.1) forward. The bigger toothed rim of gear set 1 engages
with driven gear of the 5
th
and 8
th
speeds 28. Through the resulting engagement, the power
flow is transmitted to intermediate shaft 32 of the gearbox from primary shaft 34a.
Estimated travel speeds of the BELARUS-892/892.2 tractors in all gearbox speeds
are given in paragraph 2.13 "Gear shifting".
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