Nissan Silvia. Manual — part 264
RHA861F
Precautions for Servicing Compressor
NMHA0064
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Plug all openings to prevent moisture and foreign matter from entering.
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When the compressor is removed, store it in the same position as it is when mounted on the car.
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When replacing or repairing compressor, follow “Maintenance of Lubricant Quantity in Compres-
sor” exactly. Refer to HA-79.
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Keep friction surfaces between clutch and pulley clean. If the surface is contaminated with
lubricant, wipe it off by using a clean waste cloth moistened with thinner.
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After compressor service operation, turn the compressor shaft by hand more than five turns in
both directions. This will equally distribute lubricant inside the compressor. After the compressor
is installed, let the engine idle and operate the compressor for one hour.
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After replacing the compressor magnet clutch, apply voltage to the new one and check for normal
operation.
Precautions for Service Equipment
NMHA0065
RECOVERY/RECYCLING EQUIPMENT
NMHA0065S01
Follow the manufacturer’s instructions for machine operation and
machine maintenance. Never introduce any refrigerant other than
that specified into the machine.
ELECTRONIC LEAK DETECTOR
NMHA0065S02
Follow the manufacturer’s instructions for tester operation and
tester maintenance.
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PRECAUTIONS
Precautions for Refrigerant Connection (Cont’d)
HA-7
RHA270D
VACUUM PUMP
NMHA0065S03
The lubricant contained inside the vacuum pump is not compatible
with the specified lubricant for HFC-134a (R-134a) A/C systems.
The vent side of the vacuum pump is exposed to atmospheric
pressure. So the vacuum pump lubricant may migrate out of the
pump into the service hose. This is possible when the pump is
switched off after evacuation (vacuuming) and hose is connected
to it.
To prevent this migration, use a manual valve situated near the
hose-to-pump connection, as follows.
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Usually vacuum pumps have a manual isolator valve as part
of the pump. Close this valve to isolate the service hose from
the pump.
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For pumps without an isolator, use a hose equipped with a
manual shut-off valve near the pump end. Close the valve to
isolate the hose from the pump.
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If the hose has an automatic shut off valve, disconnect the
hose from the pump: as long as the hose is connected, the
valve is open and lubricating oil may migrate.
Some one-way valves open when vacuum is applied and close
under a no vacuum condition. Such valves may restrict the pump’s
ability to pull a deep vacuum and are not recommended.
SHA533D
MANIFOLD GAUGE SET
NMHA0065S04
Be certain that the gauge face indicates R-134a or 134a. Make
sure the gauge set has 1/2
″
-16 ACME threaded connections for
service hoses. Confirm the set has been used only with refrigerant
HFC-134a (R-134a) along with specified lubricant.
RHA272D
SERVICE HOSES
NMHA0065S05
Be certain that the service hoses display the markings described
(colored hose with black stripe). All hoses must include positive
shut off devices (either manual or automatic) near the end of the
hoses opposite the manifold gauge.
RHA273D
SERVICE COUPLERS
NMHA0065S06
Never attempt to connect HFC-134a (R-134a) service couplers to
an CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers
will not properly connect to the CFC-12 (R-12) system. However, if
an improper connection is attempted, discharging and contamina-
tion may occur.
Shut-off valve rotation
A/C service valve
Clockwise
Open
Counterclockwise
Close
PRECAUTIONS
Precautions for Service Equipment (Cont’d)
HA-8
RHA274D
REFRIGERANT WEIGHT SCALE
NMHA0065S07
Verify that no refrigerant other than HFC-134a (R-134a) and speci-
fied lubricants have been used with the scale. If the scale controls
refrigerant flow electronically, the hose fitting must be 1/2
″
-16
ACME.
CALIBRATING ACR4 WEIGHT SCALE
NMHA0065S09
Calibrate the scale every three months.
To calibrate the weight scale on the ACR4:
1.
Press Shift/Reset and Enter at the same time.
2.
Press 8787. “A1” will be displayed.
3.
Remove all weight from the scale.
4.
Press 0, then press Enter. “0.00” will be displayed and change
to “A2”.
5.
Place a known weight (dumbbell or similar weight), between
4.5 and 8.6 kg (10 and 19 lb) on the center of the weight scale.
6.
Enter the known weight using four digits. (Example 10 lb =
10.00, 10.5 lb = 10.50)
7.
Press Enter — the display returns to the vacuum mode.
8.
Press Shift/Reset and Enter at the same time.
9.
Press 6 — the known weight on the scale is displayed.
10. Remove the known weight from the scale. “0.00” will be dis-
played.
11. Press Shift/Reset to return the ACR4 to the program mode.
CHARGING CYLINDER
NMHA0065S08
Using a charging cylinder is not recommended. Refrigerant may be
vented into air from cylinder’s top valve when filling the cylinder
with refrigerant. Also, the accuracy of the cylinder is generally less
than that of an electronic scale or of quality recycle/recharge
equipment.
Wiring Diagrams and Trouble Diagnoses
NMHA0066
When you read wiring diagrams, refer to the following:
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GI-11, “HOW TO READ WIRING DIAGRAMS”
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EL-8, “Wiring Diagram — POWER —” for power distribution
circuit
When you perform trouble diagnoses, refer to the following:
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GI-31, “HOW TO FOLLOW TROUBLE DIAGNOSES”
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GI-20, “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN
ELECTRICAL INCIDENT”
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PRECAUTIONS
Precautions for Service Equipment (Cont’d)
HA-9
Special Service Tools
NMHA0273
Tool number
Tool name
Description
KV99231260
Clutch disc wrench
NT204
Removing shaft nut and clutch disc
KV992T0001
Clutch disc puller
NT206
Removing clutch disc
KV992T0002
Pulley installer
NT207
Installing pulley
KV99233130
Pulley puller
NT208
Removing pulley
PREPARATION
Special Service Tools
HA-10
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