114
If it is required to check up controlled voltage:
- connect a voltmeter, not less than 0.5 class of accuracy with the dial 0-30 V
between the «+» terminal and the regulator body;
- start the truck engine and set a medium engine speed;
- switch on distant light of the headlamps as a load and read the adjustable
voltage on the voltmeter.
The voltage kept by the regulator at 15-35 °C should be 26.5-27.9 V at the
minimum level, 28.1-28.7 V at the intermediate level and 28.7-30.1 V at the
maximum level.
When checking the adjustable voltage V on the bench (Fig. 91), the rotor
speed should be 3500 min
-1
and load current – 18A. If voltage exceeds that in the
technical specifications, replace the regulator.
Fig. 91. Connecting Diagram for Voltage Regulator and Generator
for Checking Voltage Regulator on Bench:
1 - alternator; 2 - ignition switch; 3 - voltage regulator; 4 -current indicator; 5 - stor-
age battery; 6 - voltmeter; 7 - load; 8 - «ground» switch
Storage batteries
The storage batteries are designed to start the engine with the help of starter
and operate in combination with the alternator at maximum loads.
The storage batteries filled with electrolyte are installed in the truck. Dry-
charged storage batteries, which are capable to keep their original charge within a
year from the moment of their charging, can be installed upon a special request.
Basic technical data of storage batteries
Rated Voltage, V
12
A
ּ◌
h Capacity at 20 Hrs Rate &
electrolyte tempe25
o
C
190
Discharge Current at 20 Hrs Rate, A
9.5
Total Acid Volume in Battery, l
12
Charging Current, A
19
Wet Battery Weight, kg
71
