AR20.10-B-2455A | Check coolant thermostat | 12.02.16 |
Cumbustion engine 904.925
Cumbustion engine 904.965
B20.10-0005-04
1 Thermostatic valve
1.1 Main valve
1.2 Short-circuit valve
2 Container
3 Thermometer up to 150 oC
4 Heater
L Short-circuit valve stroke
| Check | ||
1 | Remove the thermostatic valve (1) | Engine 904, 906, 924, 926 | |
Engine 926 | |||
Engine 457.922/928/931 | |||
Engine 457.915/916/925/929/932 | |||
2 | Attach a wire to the thermostatic valve (1) and immerse it in the container (2) with water | ||
3 | Heat up the water with a suitable heating source (5), while stirring the water to obtain a uniform temperature | Do not use blowtorch to heat up the water. | |
4 | Measure the water temperature | From 8 o C lower than opening start, the temperature cannot be increased by more than 1 to 2 o C per minute. When water temperature reaches the opening start value, the valve will begin to open. | |
5 | Slowly heat up the water to full stroke temperature (L) of the circuit short valve (1.2) | ||
6 | Slowly heat water to the total opening temperature of the main valve (1.1). After 6 to 8 minutes, the main valve (1.1) will be fully open. Next, measure the opening | If the indicated values are not obtained or in case of any malfunction indication, the thermostatic valve (1) should be replaced by a new one. | |
7 | Install the thermostatic valve (1) | Engine 904, 906, 924, 926 | |
Engine 926 | |||
Engine 457.922/928/931 | |||
Engine 457.915/916/925/929/932 |
Coolant thermostat
Número | Denominação | Engine 457.9 | Engine 904.9; 906.9 | |||
BE20.10-B-1001-02B | Nominal temperature | of C | 83 | 83 | ||
Beginning of opening | of C | 81...85 | 81...85 | |||
BE20.10-B-1002-02B | Main valve | Maximum opening | of C | 95 | 95 | |
Minimum stroke | mm | 8 | 8 | |||
BE20.10-B-1003-02B | Short circuit valve | Fully closed | of C | 92 | 92 | |
Stroke | mm | 6...7.5 | 6...7.5 | |||
Coolant thermostat