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. Instrument board
The scheme of the instruments dashboard 80-3805010- Д1 and 826 -3805010 is given in
the section “Appendix”.
The instrumentation includes:
- instruments combination
(Р2) with sensors;
- the electric tachospeedometer (Р1) with the control board (А3) and sensors;
- the electric light and audible alarms combined into two pilot lamp units (HG1 and
HG2) with the instruments dashboard 80-3805010- Д1 or into the pilot lamp unit and m e-
ter combined with the instruments dashboard 826-3805010.
To switch on the instruments, turn the starter and instrumentation switch key to the “I”
position. Then the voltage will be applied to the terminal “K3” of the switch, then to the
relay of instruments power supply, to the fuse (F2) of the unit and further – to the units
(HG1 and HG2), tachospeedometer (Р1), alarm device (НА2), combination meter (Р 1)
and speed sensors (BV1 and BV2).
The instruments pointers shall move to the zero position of the scale or to the position
corresponding to the true value of the parameter controlled by the system at the mo-
ment.
In case of deviation of instruments readings from their true values, detect the cause of
the fault following the recommendations below.
1.1 Tachospeedometer АР70.3813 (Fig. 1)
Рис . 1. Tachospeedometer ( Р 1):
1. Engine crankshaft rotational speed scale, rpm.
2. PTO II rotational speed scale –1000 rpm.
3. PTO I rotational speed scale –540 rpm.
4. PTO rotational speed display (LED).
5. Engine running hours indication, h.
6. Tractor speed indication, km/h.
7. Display of engine running hours and tractor speed (LCD)
8. Pointer indicator of the engine crankshaft speed