Honda Acura NSX 1991, Service Manual

Page: 953 / 1420

A/C Service Tips and Precautions
1 . Always disconnect the negative cable from the battery whenever replacing air conditioner parts.
2. Keep moisture and dust out of the system. When disconnecting any lines, plug or cap the fittings immediately; don’t
remove the caps or plugs until just before you reconnect each line.
3. Before connecting any hose or line, apply a few drops of refrigerant oil to the
4. When tightening or loosening a fitting, use a second wrench to support the matching fitting.
5. When discharging the system, use a refrigerant recovery system; don’t release refrigerant into the atmosphare.
6. And refrigerant oil after replacing the following parts:
Condenser . . . . . . . . . . . . . . . . . . . . . . . . 10 cc fl
Evaporator . . . . . . . . . . . . . . . . . . . . . . . . fl
or hose . . . . . . . . . . . . . . . . . . . . . 20 cc fl
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 cc fl
Compressor.. . . . . . . . . . . . . . . . . . . . . On compressor replacement, subtract the volume of oil drained from the removed com-
pressor from cc and drain the calculated volume of oil from the new
compressor: 80 cc fl of oil from removed
to drain from new compressor.
Don’t overtighten fittings; you could damage them. Leaks are caused by faulty O-rings, overtightening won’t stop them.
CORROSION RESISTANT BOLT
Suction hose and discharge hose
to lines . . . . . . . . . . . . . .
22 (2.2 kg-m, 16 lb-ft)
Discharge line C
(both side) . . .
23 (2.3 kg-m, 17 lb-ft)
Condenser line A
(both side) . . . . . . . . . . . . . . . . . . . . . . .
23 (2.3 kg-m, 17 lb-ft)
Condenser line C to left side
condenser . . . . . . . . . . . . . . . . . . . . . . . .
14 (1.4 kg-m, 10 lb-ft)
Receiver-dryer . . . . . . . . . . . . . . . . . . 14 (1.4 kg-m, 10 lb-ft)
Receiver line and suction line to heater
assembly . . . . . . . . . . . . . . . . . . . . . . . . .
22 (2.2 kg-m, 16 lb-ft)
Compressor hose mounting
bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 (2.2 kg-m, 16 lb-ft)
Compressor mounting
bolts . . . ..a......................... 25
(2.5 kg-m, 18 lb-ft)
Compressor bracket
mounting bolts . . . . . . . . . . . . . . . . .
50 (4.5 kg-m, 36 lb-ft)
Idler pulley center nut . . . . 45 (4.5 kg-m, 32.5 lb-ft)
6 mm bolt . . . . . . . . . . . . . . . . . . 10 kg-m, 7.2 lb-ft)
When handling refrigerant (R-12):
Always wear eye protection.
l
Do not let refrigerant get on your skin or in your eyes. If it does:
Do not rub your eyes or skin.
Splash large quantities of cool water in your eyes or on your skin.
Rush to a physician or hospital for immediate treatment. Do not attempt to treat it yourself.
l
Keep refrigerant containers (cans of R-12) stored below
l
Do not handle or discharge refrigerant in an enclosed area near an open flame; it may ignite and produce a poisonous
gas.
l The ozone is fragile layer surrounding the earth which acts as a shield against the sun’s ultraviolet radiation. Chlo-
rine from chemicals called chlorofluorocarbons destroy the ozone in the stratosphere. Automotive air con-
ditioning systems currently use chlorofluorocarbons as the refrigerant. Auto air conditioning service equipment
has been developed to minimize the release of
to the atmosphere. All service procedures should be per-
formed using this equipment and the manufactuer’s instructions.
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