Nissan Silvia. Manual - part 264

RHA861F

Precautions for Servicing Compressor

NMHA0064

Plug all openings to prevent moisture and foreign matter from entering.

When the compressor is removed, store it in the same position as it is when mounted on the car.

When replacing or repairing compressor, follow “Maintenance of Lubricant Quantity in Compres-
sor” exactly. Refer to HA-79.

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.

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.

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.

IDX

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.

Usually vacuum pumps have a manual isolator valve as part
of the pump. Close this valve to isolate the service hose from
the pump.

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.

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

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.

Press 8787. “A1” will be displayed.

Remove all weight from the scale.

Press 0, then press Enter. “0.00” will be displayed and change
to “A2”.

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.

Enter the known weight using four digits. (Example 10 lb =
10.00, 10.5 lb = 10.50)

Press Enter — the display returns to the vacuum mode.

Press Shift/Reset and Enter at the same time.

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:

GI-11, “HOW TO READ WIRING DIAGRAMS”

EL-8, “Wiring Diagram — POWER —” for power distribution
circuit

When you perform trouble diagnoses, refer to the following:

GI-31, “HOW TO FOLLOW TROUBLE DIAGNOSES”

GI-20, “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN
ELECTRICAL INCIDENT”

IDX

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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