Expansion Valve, Removing And Installing: Installing
The expansion valve is available in different versions (same housing but different control characteristic). Allocation. Refer to the Parts Information.
Check the refrigerant pipes leading to the evaporator for contamination and damage.
Coat the O-rings with refrigerant oil before installing. Refer to REFRIGERANT CIRCUIT SEALS .
Check the O-rings for proper seating on the evaporator connecting pipes.
-- Replace the O-rings. Refer to the Parts Information for the version.
-- Install the O-rings -1 and 4- onto the connecting pipes -2 and 3- to the evaporator.
-- Make sure the retainer -4- (bracket for securing the expansion valve on the evaporator pipes) is in the proper installation position (must not be pushed too far into the foam piece -5-, otherwise the bolts may not engage).
-- Attach the expansion valve -4- to the refrigerant lines to the evaporator.
-- Tighten the bolts -1 and 3-.
If the heat shield insulation -2- is missing or not installed correctly, it can cause reduced output of the A/C system (change of the set control characteristic due to radiant heat).
Reinstall in reverse order of removal. Note the following:
-- Install the refrigerant lines with inner heat exchanger. Refer to REFRIGERANT LINES WITH INNER HEAT EXCHANGER, REMOVING AND INSTALLING .
Tightening Specifications: