Komatsu 830E-AC Shop Manual page 947

When installing a new compressor, the compres-
sor must be completely drained of its oil before
installation. Add 207 ml (7 oz.) of new PAG oil to
the compressor to ensure proper system oil
level. Failure to adjust the amount of oil in the
compressor will lead to excessive system oil and
poor A/C performance. Additionally, a new
receiver-drier and accumulator must be installed
and oil added to both of these components.
REPLACING OIL
Component Oil to add
Condenser 60-90 ml (2-3 ounces)
Evaporator 30 ml (1 ounce)
Receiver-Drier 60 ml (2 ounces)
Accumulator 60 ml (2 ounces)
Compressor 207 ml (7 ounces)
Block Valve
Adding oil is not necessary
(Expansion)
Drain and measure amount
Hoses
removed
5. Connect all hoses and components in the sys-
tem. Lubricate O-rings with clean mineral oil
before assembly.
NOTE: Do not use PAG oil to lubricate O-rings or
fittings. PAG oil will attract moisture and will corrode
fittings when used externally. Use only clean mineral
oil to lubricate fittings and O-rings during assembly.
6. Evacuate the system. Refer to Evacuating The
System.
N04031 10/06
REFRIGERANT
Recycled Refrigerant
Recycled refrigerant has been extracted from a
mobile air conditioning system using a recovery unit.
The refrigerant is cleaned by the recovery unit as it
passes through filters located on the unit that meet
specifications stipulated by Society of Automotive
Engineers, SAE J2099. The refrigerant that has
passed through the filtering process has only been
cleaned of contaminants that are associated with
mobile systems. Therefore, recycled refrigerant from
mobile systems is only acceptable for reuse in mobile
systems.
Reclaimed Refrigerant
Reclaimed refrigerant has been filtered through a
more thorough filtering process and has been pro-
cessed to the same standards of purity as virgin
refrigerant. Because of this, reclaimed refrigerant is
acceptable for use in all systems, not just mobile.
The reclaiming equipment used for this process is
expensive, and therefore, not common among nor-
mal maintenance shops. Equipment such as this is
more commonly found in air conditioning specialty
shops.
Always use new, recycled, or reclaimed refriger-
ant when charging a system. Failure to adhere to
this recommendation may result in premature
wear or damage to air conditioning system com-
ponents and poor cooling performance.
Refrigerant Quantity
If not enough refrigerant is charged into the system,
cooling ability will be diminished. If too much refriger-
ant is charged into the system, the system will oper-
ate at higher pressures, and in some cases, may
damage system components. Exceeding the speci-
fied refrigerant charge will not provide better cooling.
Operator Comfort N4-21