Derbi GPR 125 Racing, Workshop Manual

Page: 173 / 247

6 - COOLING SYSTEM
173
CHECKING THE ELEMENTS
- Thermostat (checking opening).
- Submerge the thermostat in a container filled with
coolant.
- Submerge a thermometer in the same container, gradua-
ted between 0° - 150° C (32° - 302° F).
- Position the container over a burner and heat the liquid up
slowly.
- Check that the temperature indicated on the thermometer
and the thermostat opening temperature correspond to:
Opening commencement temperature: 80° C
Fully open temperature: 85° C
CHECKING THE ELEMENTS
- Thermal switch.
- Remove the thermal switch (1) from the radiator.
- As indicated in the figure, connect a pocket meter (2)
(configured to measure electrical continuity) to the thermal
switch (1).
- Submerge the thermal switch in a container (3) filled with
coolant.
- Submerge a thermometer (4) in the same container, gra-
duated between 0°- 150° C (32° - 302° F).
- Position the container over a burner (5) and heat the
liquid up slowly.
- Check that the temperature indicated on the thermometer,
and the value of the thermal switch indicated on the meter,
correspond to:
- Above 100 +/- 2° C = Open circuit (0).
- Below 100 +/- 2° C = No circuit (1).
DO NOT REMOVE THE SWITCH OF
THE RADIATOR IS HOT.
THERMAL SWITCH TIGHTENING
TORQUE.
Thermal switch:
1,7-2,0 kfg.m (17-20 N.m)
WARNING
N.B.