Raider 4WD V6-3.7L SOHC (2007)
Refrigerant Oil: Description and Operation
OIL - A/C REFRIGERANT
DESCRIPTION
The refrigerant oil used in R-134a refrigerant systems is a synthetic-based, polyalkylene glycol (PAG), wax-free lubricant. Mineral-based R-12
refrigerant oils are not compatible with PAG oils, and should never be introduced to an R-134a refrigerant system.
There are different PAG oils available, and each contains a different additive package. The Denso 10S17 A/C compressor used in this vehicle is
designed to use ND-8 PAG refrigerant oil. Use only this type of refrigerant oil in the refrigerant system.
OPERATION
After performing any refrigerant recovery or recycling operation, always replenish the refrigerant system with the same amount of the recommended
refrigerant oil as was removed. Too little refrigerant oil can cause A/C compressor damage, and too much can reduce A/C system performance.
PAG refrigerant oil is more hygroscopic than mineral oil, and will absorb any moisture it comes into con- tact with, even moisture in the air. The PAG
oil container should always be kept tightly capped until it is ready to be used. After use, recap the oil container immediately to prevent moisture
contamination.
STANDARD PROCEDURE
REFRIGERANT OIL LEVEL
When an A/C system is assembled at the factory, all components except the A/C compressor are refrigerant oil free. After the refrigerant system has been
charged and operated, the refrigerant oil in the A/C compressor is dispersed throughout the refrigerant system. The A/C accumulator, A/C condenser,
A/C evaporator and the A/C compressor will each retain a significant amount of the needed refrigerant oil. It is important to have the correct amount of
refrigerant oil in the A/C system. This ensures proper lubrication of the A/C compressor. Too little oil will result in damage to the A/C compressor, while
too much oil will reduce the cooling capacity of the A/C system and consequently result in higher discharge air temperatures.
CAUTION: The oil used in the Denso 10S17 A/C compressor is ND-8 PAG R-134a refrigerant oil. Only refrigerant oil of the same type should
be used to service the A/C system. Do not use any other refrigerant oil. The oil container should be kept tightly capped until it is ready for use
and then tightly capped after use to prevent contamination from dirt and moisture. Refrigerant oil will quickly absorb any moisture it comes in
contact with, therefore, special effort must be used to keep all R-134a system components moisture-free. Moisture in the refrigerant oil is very
difficult to remove and will cause a reliability problem with the A/C compressor.
NOTE: Most reclaim/recycling equipment will measure the lubricant being removed during recovery. This amount of lubricant should be added back
into the system. Refer to the reclaim/recycling equipment manufacturers instructions.
It will not be necessary to check the oil level in the A/ C compressor or to add oil, unless there has been an oil loss. An oil loss may occur due to a
rupture or leak from a refrigerant line, a connector fitting, a component, or a component seal. If a leak occurs, add 30 milliliters (1 fluid ounce) of
refrigerant oil to the refrigerant system after the repair has been made. Refrigerant oil loss will be evident at the leak point by the presence of a wet, shiny
surface around the leak. Refrigerant oil must be added when an A/C accumulator, A/C evaporator or A/C condenser is replaced. See the Refrigerant Oil
Capacities chart.
Refrigerant Oil Capacities
The refrigerant oil level in a new A/C compressor must first be adjusted prior to compressor installation.
