Belarus 1221.2, Руководство оператора

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BELARUS-1221.2/1221 В .2/1221.3 Operating controls and instruments
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1.8. Indicator Diagnostics and Troubleshooting
1. The diagnostics of the faults according to items 1- 3 and 5 is similar to that of
the tachospeedometer;
2. Over- or understated readings of the engine rotational speed and PTO’s rota-
tional speed (with the normal movement of the pointer):
Check the correctness of programming the instrument according to the gear ratio of the
alternator drive (parameter “K2”): (see item 1.7);
3. Over- or understated readings of the tractor speed:
1. Check the correctness of programming the instrument according to the rolling radius
of the rear wheels (R) (see item 1.7);
2. Check the correctness of programming according to the number of teeth of the half-
axle pinion (Z1) (see item 1.7);
3. Check the correctness of programming of the gear rate of the wheel reduction gear
(K1) (see item 1.7).
4. No readings of the tractor motion speed:
Check the presence of the signals from the both speed sensors (BV1, BV2).
5. Signalling of operation of the speed sensor as in case of absence of a signal
from one of them:
a) in case of absence of the signal from the right wheel speed sensor (BV1) within 12 s
after starting the motion the symbol “□” is displayed on the right of the digital indicator ;
check the connection and serviceability of the right wheel speed sensor;
b) in case of absence of the signal from the left wheel speed sensor (BV2) within 12 s
after starting the motion the symbol “□” is displayed on the left of the digital indicator;
check the connection and serviceability of the left wheel speed sensor.
1.9 Combined indicator АР80.3813 and combined indicating unit КД8105
(mounted on the tractors with the instrument dashboa rd 826 - 3805010)
The combined indicator (hereinafter referred to as the CI) and the control board (herein-
after referred to as the CB) monitor the operational parameters of the systems and units
of the Belarus tractors and provide the operator with the information on malfunction or
failure of a particular system.
The CI includes the indicators and alarm lamps monitoring the following parameters: