Grand Cherokee 4WD L6-242 4.0L VIN S MFI (1993)
Coupler HVAC: Service and Repair
Coupling Connect
1. Check to ensure that the garter spring is in the cage of the male fitting. If the garter spring is missing, install a new spring by pushing it into the
cage opening. If the garter spring is damaged, remove it from the cage with a small wire hook (do not use a screwdriver) and install a new spring.
2. Clean all dirt or foreign material from both pieces of the coupling.
3. Install new 0-rings on the male fitting.
CAUTION: Use only the specified 0-rings as they are made of a special material for the R-134a system. The use of any 0-ring other than the
specified 0-ring may allow the connection to leak intermittently during vehicle operation.
4. Lubricate the male fitting and 0-rings and the inside of the female fitting with clean R-134a (ND8 PAG) refrigerant oil.
5. Install the plastic indicator ring into the cage opening if indicator ring is to be used.
6. Fit female fitting to male fitting and push until garter spring snaps over flared end of female fitting. If plastic indicator ring is used, it will snap out
of the cage opening when the coupling is connected to indicate engagement.
7. If indicator ring is not used, ensure coupling engagement. This is done by visually checking to be sure garter spring is over the flared end of female
fitting.
