1.9. Combined indicator АР80.3813 and combined indicating unit КД8105 (mounted
on the tractors with the instrument dashboard 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 MTZ 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:
Р1 – speed indicator (pointer-type);
Р2 – engine rotational speed indicator (pointer-type);
РS1 – LCD, multifunction indicator (for the description and principle of operation of the
РS1 in more detail, see below)
РS2 – PTO rotational speed indicator (light indicator);
HG1 – pilot lamp-alarm of the overvoltage in the on-board power supply system (red);
HG2 – pilot lamp-alarm of the parking brake application (red);
HG3 – pilot lamp-indicator of switching on the turn indicators of the tractor (green);
HG4 – pilot lamp-indicator of switching on the turn indicators of the trailer (green);
HG5 – pilot lamp-indicator of switching on the upper beam of the headlights (blue);
HG6, HG10 – PTO scale segments (yellow);
HG7… HG9 – PTO scale segments (green);
HG11, HG12 – scale range indicator of the PTO 1000 and 540, respectively (yellow);
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