Checking The Thermal Expansion Valve - APRILIA RSV mille Workshop Manual

COOLING SYSTEM
 2%-/6).' 4(% 4(%2-!, %80!.3)/.
6!,6%
Carefully read 0.5.1 (PRECAUTIONS AND GENERAL
INFORMATIONS) and 1.2.5 (COOLANT).
N
Drain the cooling circuit completely, see 2.16 (CHANG-
ING THE COOLANT).
NOTE Have the appropriate special tool m to hand:
– aprilia part# 0277295 (hose clamp installation pliers).
a
CAUTION
Upon installation, replace the hose clamp that has
been removed with a new one having the same di-
mensions, see 0.4.2 (SPARE PARTS CATALOGUES).
Do not attempt to reinstall the removed hose clamp,
since it is unusable.
Do not replace the removed hose clamp with a screw
clamp or with other types of clamp.
N
Release the hose clamp (1).
N
Pull the pipe (2) off the thermal expansion valve (3).
Clamps driving torque (4) (5): 7 Nm (0.7 kgm).
N
Loosen the clamps (4) (5).
N
Grip the thermal expansion valve (3) and pull it free of
the two couplings (6) (7) one small step at a time.
a
CAUTION
Plug the coupling openings, in such a way as to pre-
vent any foreign matters from getting in.
5.6.1 CHECKING THE THERMAL EXPANSION
VALVE
Carefully read 0.5.1 (PRECAUTIONS AND GENERAL
INFORMATIONS) and 1.2.5 (COOLANT).
N
Remove the thermal expansion valve, see 5.6 (RE-
MOVING THE THERMAL EXPANSION VALVE).
N
Check the heat-sensitive wax for signs of cracking or
excessive wear: in this case, replace the whole valve
(3).
Check the valve (3) is working properly as follows:
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Tie a piece of string around the valve (3).
N
Place a container (8) holding coolant on a burner (9).
N
Immerse the valve (3) in the container.
NOTE
The valve (3) must be fully submersed without
allowing it to touch the walls or bottom of the container (8).
N
Secure the string so that the valve (3) remains in place.
N
Heat the coolant, using a thermometer (10) with a 0 –
150 °C (32 – 302 °F) range to check the rise in temper-
ature.
5 - 10
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RSV mille
Release 00/2002-10