Pilot Lamps Unit - Belarus 1822.3 Operator's Manual

2.6 Pilot lamps unit

The pilot lamps unit 14 (figure 2.1.1) includes five lamps. The allocation scheme is
presented in figure 2.6.1.
1 – pilot lamp to indicate that the air cleaner filter is clogged to the max. (orange
color); 2 – pilot lamp to indicate emergency oil pressure drop in the system of hydrostatic
power steering (red color); 3 – pilot lamp to indicate rear axle differential lock (orange
color); 4 – pilot lamp to indicate operation of heating plugs (orange color) 5 – pilot lamp to
indicate emergency brake fluid level (orange color).
The operating principle of the pilot lamps of PLU is the following:
- pilot lamp 1 to indicate that the air filter is clogged to the max. (figure 2.6.1) lights
up when the max. permissible level of filter dirtiness is exceeded and the filter requires
cleaning;
- pilot lamp 2 to indicate emergency oil pressure drop in the system of hydrostatic
power steering lights up when the oil pressure in the system of hydrostatic power steering
drops below 0,08 MPa (periodic lighting up of the lamp 2 with engine minimal speed is as-
sumed – when revolutions are increased the lamp will go out);
- pilot lamp 3 to indicate rear axle differential lock lights up when activating rear axle
differential lock;
- pilot lamp 5 to indicate emergency brake fluid lights up when brake fluid level in
the tanks of master brake cylinders is below the permissible level.
- pilot lamp of the heating plugs indicates heating plugs operation (functioning algo-
rithm of the pilot lamp indicating heating plugs operation is provided in subsection 3.21.2
"Heating plugs operational principle" of this manual).
Figure 2.6.1 – Pilot lamps unit
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