AR20.10-B-2455B | Check coolant thermostat | 12.02.16 |
Cumbustion engine 372, 374, 376, 377, 386 with Vehicle 382, 384, 386, 682, 684, 688, 693, 694, 695
B20.10-0011-04
1 Thermostatic valve
1.1 Main valve
1.2 Short circuit valve
2 Container
3 Thermometer up to 150 0 C
4 Fastening wire
5 Heater
L Stroke of short-circuit thermostat
| Check: | ||
1 | Remove the thermostat (1) | ||
2 | Fasten on the wire (4), the thermostat (1) and immerse it in the water filled container (2) | ||
3 | Heat-up the water with a suitable heat source (5), stirring the water at the same time to obtain a uniform temperature. | Do not use a blow torch to heat the water. | |
4 | Measure the water temperature. | As from 8 °C, below the opening starts, the temperature must not raise more than 1 to 2 ºC per minute. When the water temperature reaches the beginning of opening value, the valve will have to start to open. | |
5 | Slowly heat-up the water to the full stroke temperature (L) of the short-circuit valve (1.2). | ||
6 | Slowly heat-up the water to the total opening temperature of the main valve (1). After 6 to 8 minutes, the main valve (1.1) will have to be completely open. Next, measure the opening. | In case the indicated values are not obtained or there is any sign of malfunction, the thermostat (1) will have to be replaced by a new one. | |
7 | Install the thermostat (1). |
Coolant thermostat
Número | Denominação | Engine 374.905/907/908, 374.950/951/952, 374.953/978/979, 3749.985/986/987, 3749.988/989/990 Engine 374.976/977/992 from engine number 674.464 on | Engine 372.9, 376.90/93/94, 376.95/98/99 | |||
BE20.10-B-1001-02A | Nominal temperature and start of opening | Nominal | °C | 83 | 83 | |
Beginning of opening | °C | 81...85 | 81...85 | |||
BE20.10-B-1002-02A | Main valve | Maximum opening | °C | 95 | 95 | |
Minimum stroke | mm | 8 | 8 | |||
BE20.10-B-1003-02A | Short circuit valve | Fully closed | °C | 92 | 92 | |
Stroke | mm | 6...7.5 | 6...7.5 | |||
Coolant thermostat
Número | Denominação | Engine 377.9 except for 377.987; | Engine 376.961/962/963, 376.964/967/972 | |||
BE20.10-B-1001-02A | Nominal temperature and start of opening | Nominal | °C | 83 | 83 | |
Beginning of opening | °C | 81...85 | 81...85 | |||
BE20.10-B-1002-02A | Main valve | Maximum opening | °C | 95 | 95 | |
Minimum stroke | mm | 8 | 8 | |||
BE20.10-B-1003-02A | Short circuit valve | Fully closed | °C | 92 | 92 | |
Stroke | mm | 6...7.5 | 6...7.5 | |||
Coolant thermostat
Número | Denominação | Engine 374.991/993/996 Engine 374.976/977/992 up to engine 674464Engine 377.987 | Engine 372.924/926/927, 376.929 Engine 374.980/981/982, 374.984 Engine 376.919/922/923, 376.924/925/926, 376.927/968/969, 376.970/975/976, 376.977 | |||
BE20.10-B-1001-02A | Nominal temperature and start of opening | Nominal | °C | 86 | 79 | |
Beginning of opening | °C | 84...86 | 77...81 | |||
BE20.10-B-1002-02A | Main valve | Maximum opening | °C | 95 | 94 | |
Minimum stroke | mm | 8 | 8 | |||
BE20.10-B-1003-02A | Short circuit valve | Fully closed | °C | 92 | 91 | |
Stroke | mm | 6...7.5 | 6...7.5 | |||
Coolant thermostat