Toyota
Dodge Durango
 Service Manual
Heating and Air Conditioning » Description and operation
Refrigerant lines

DESCRIPTION

The refrigerant lines and hoses are used to carry the refrigerant between the various air conditioning system components. A barrier hose design with a nylon tube, which is sandwiched between rubber layers, is used for the R-134a air conditioning system on this vehicle. This nylon tube helps to further contain the R-134a refrigerant, which has a smaller molecular structure than R-12 refrigerant. The ends of the refrigerant hoses are made from lightweight aluminum or steel, and commonly use braze-less fittings.

Any kinks or sharp bends in the refrigerant plumbing will reduce the capacity of the entire air conditioning system. Kinks and sharp bends reduce the flow of refrigerant in the system. A good rule for the flexible hose refrigerant lines is to keep the radius of all bends at least ten times the diameter of the hose.

In addition, the flexible hose refrigerant lines should be routed so they are at least 80 millimeters (3 inches) from the exhaust manifold.

OPERATION

High pressures are produced in the refrigerant system when the air conditioning compressor is operating.

Extreme care must be exercised to make sure that each of the refrigerant system connections is pressure-tight and leak free. It is a good practice to inspect all flexible hose refrigerant lines at least once a year to make sure they are in good condition and properly routed.

The refrigerant lines and hoses are coupled with other components of the HVAC system with peanutblock style fittings. A stat-O seal type flat steel gasket with a captured compressible O-ring, and spring lock coupler, is used to mate plumbing lines with A/C components to ensure the integrity of the refrigerant system.

The refrigerant lines and hoses cannot be repaired and, if faulty or damaged, they must be replaced.

    More about «Description and operation»:

    Blower motor

    Blower motor relay

    Blower motor resistor

    Blower motor switch

    Compressor

    Compressor clutch

    Compressor clutch relay

    Condenser

    Electronic cycling clutch switch

    Evaporator coil

    Expansion valve

    Filter-drier

    Heater and air conditioner

    Heater and air conditioner control

    Heater core

    High pressure cut-off switch

    High pressure relief valve

    Low pressure cut-off switch

    Rear overhead air conditioner

    Refrigerant

    Refrigerant lines

    Refrigerant line couplers

    Refrigerant oil

    Refrigerant system service ports

    Vacuum check valve

    Vacuum reservoir

    Dodge Durango Service Manual / Heating and Air Conditioning / Description and operation / Refrigerant lines

    Dodge Durango Service Manual

    Categories


    © 2017-2024 Copyright www.dodurango.net
    0.0211