Nissan Frontier D22. Manual - part 821

MTC-6

PRECAUTIONS

O-RING AND REFRIGERANT CONNECTION

CAUTION:

Refrigerant connections in some systems use different O-ring configurations. Do not confuse O-rings
since they are not interchangeable. If a wrong O-ring is installed, refrigerant will leak at or around the
connection.

WJIA0272E

PRECAUTIONS

MTC-7

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MTC

O-Ring Part Numbers and Specifications

*: Always check with the Parts Department for the latest parts information.

WARNING:

Make sure all refrigerant is discharged into the recycling equipment and the pressure in the system is
less than atmospheric pressure. Then gradually loosen the discharge side hose fitting and remove it.

CAUTION:

When replacing or cleaning refrigerant cycle components, observe the following.

●

When the compressor is removed, store it in the same position as it is when mounted on the car.
Failure to do so will cause lubricant to enter the low pressure chamber.

●

When connecting tubes, always use a torque wrench and a back-up wrench.

●

After disconnecting tubes, immediately plug all openings to prevent entry of dirt and moisture.

●

When installing an air conditioner in the vehicle, connect the pipes as the final stage of the opera-
tion. Do not remove the seal caps of pipes and other components until just before required for
connection.

●

Allow components stored in cool areas to warm to working area temperature before removing seal
caps. This prevents condensation from forming inside A/C components.

●

Thoroughly remove moisture from the refrigeration system before charging the refrigerant.

●

Always replace used O-rings.

●

When connecting tube, apply lubricant to circle of the O-rings as shown in illustration. Be careful
not to apply lubricant to threaded portion.
Lubricant name: NISSAN A/C System Lubricant Type R
Part number: KLH00-PAGR0

●

O-ring must be closely attached to inflated portion of tube.

●

After inserting tube into union until O-ring is no longer visible, tighten nut to specified torque.

Connec-
tion type

O-ring 

size

Part No.*

D

mm (in)

W

mm (in)

New

8

92471 N8210

6.8 (0.268)

1.85 (0.0728)

Former

92470 N8200

6.07 (0.23990)

1.78 (0.0701)

New

12

92472 N8210

10.9 (0.429)

2.43 (0.0957)

Former

92475 71L00

11.0 (0.433)

2.4 (0.094)

New

16

92473 N8210

13.6 (0.535)

2.43 (0.0957)

New

19

92474-N8210

16.5 (0.650)

2.43 (0.0957)

SHA814E

MTC-8

PRECAUTIONS

●

After connecting line, conduct leak test and make sure that there is no leakage. When the gas
leaking point is found, disconnect that line and replace the O-ring. Then tighten connections of
seal seat to the specified torque.

Precautions for Servicing Compressor

EJS001ZR

●

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

●

Do not keep the compressor in the upside down position or laid on its side for more than 10 min-
utes.

●

When replacing or repairing compressor, refer to 

MTC-17, "Maintenance of Lubricant Quantity in

Compressor"

 .

●

Keep friction surfaces between clutch and pulley clean. If the surface is contaminated with lubri-
cant, 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

EJS001ZS

RECOVERY/RECYCLING EQUIPMENT

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

Follow the manufacturer's instructions for tester operation and tester maintenance.

AHA514A

PRECAUTIONS

MTC-9

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MTC

VACUUM PUMP

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 pres-
sure 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 man-
ual 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: when 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.

MANIFOLD GAUGE SET

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.

SERVICE HOSES

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.

AHA559A

SHA533D

AHA560A