Mustang V8-5.4L SC (2008)
Coupler HVAC: Description and Operation
Spring Lock Coupling
Spring Lock Coupling
The spring lock coupling is a refrigerant line coupling held together by a garter spring inside a circular cage.
-
When the coupling is connected together, the flared end of the female fitting slips behind the garter spring inside the cage of the male fitting.
-
The garter spring and cage then prevent the flared end of the female fitting from pulling out of the cage.
-
Three O-ring seals are used to seal between the 2 halves of the coupling.
-
Use only the O-ring seals listed in the Ford Master Parts Catalog for the spring lock coupling.
-
A plastic indicator ring is used on the spring lock couplings of the A/C evaporator core to indicate, during vehicle assembly, that the coupling is
connected. Once the coupling is connected, the indicator ring is no longer necessary but will remain captive by the coupling near the cage opening.
-
The indicator ring may also be used during service operations to indicate connection of the coupling.
-
An A/C tube lock coupling clip may be used to secure the coupling.
Peanut Fitting
When disconnecting or connecting peanut fittings, observe the following.
-
The male and female blocks of the peanut fitting are retained with a nut.
-
Support the female fitting with a wrench to prevent twisting of the tubes.
-
An O-ring seal is installed around the tube on the male block.
-
On 4.6L and 5.4L vehicles, a gasket seal is installed along with the O-ring seal at the A/C compressor fittings.
-
When correctly assembled, the male and female fittings should be flush.
-
Use only the seals listed in the Ford Master Parts Catalog.
