RAM 3500 HD Truck 2WD L6-6.7L DSL Turbo (2008)
Hose/Line HVAC: Description and Operation
Liquid Line
DESCRIPTION
The A/C liquid line is the refrigerant line that carries refrigerant from the A/C condenser to the A/C evaporator. The A/C liquid line consists of two
separate lines that connect to each other using a spring-lock type refrigerant line coupler See: Coupler HVAC/Description and Operation/Description .
The A/C liquid line is made from light-weight aluminum tubing with braze-less and crimp type fittings and nylon tubes with rubber barrier hose.
NOTE: A/C orifice tube size is different between gasoline and diesel engines. Be sure to use the correct A/C liquid line when replacement of the
A/C orifice tube is required.
The front section of the A/C liquid line includes the high-side service port and the rear section of the A/C liquid line includes the A/C fixed orifice tube.
NOTE: Replacement of the refrigerant line O-ring seals and gaskets is required anytime a refrigerant line is opened. Failure to replace the
rubber O-ring seals and metal gaskets could result in a refrigerant system leak.
The A/C liquid line has no serviceable parts except for the O-ring seals and gaskets, high-side service port valve, cap and secondary retaining clip. The
O-ring seals used on the connections are made from a special type of rubber not affected by R-134a refrigerant. The O-ring seals and gaskets must be
replaced whenever the A/C liquid line is removed.
The A/C liquid line cannot be repaired and must be replaced if found to be leaking or damaged, or if the fixed orifice tube is inoperative.
