Ford Festiva. Instruction — part 85

compressor label before adding refrigerant oil to A/C compressor/system. See

Fig. 2

. The following R-134a refrigerant oils are currently

available.

Lexus

PAG Refrigerant Oil (ND-OIL 8) with 10P/10PA swashplate (piston) compressor. Synthetic Refrigerant Oil (ND-OIL 9) with through-vane
(rotary vane) compressor.

Mercedes-Benz

PAG Refrigerant Oil (001 989 08 03).

Nissan

PAG Refrigerant Oil (KLH00-PAGR0) with rotary vane compressor. PAG Refrigerant Oil (KLH00-PAGS0) with piston (swashplate)
compressor.

Saab

PAG Refrigerant Oil (40 74 787).

SERVICE EQUIPMENT

Because R-134a is not interchangeable with R-12, separate sets of hoses, manifold gauge set and recovery/recycling equipment are required to
service vehicles. This is necessary to avoid cross-contaminating and damaging system.

All equipment used to service systems using R-134a must meet SAE standard J1991. The service hoses on the manifold gauge set must have
instruction (turn wheel) or automatic back-flow valves at the service port connector ends. This will prevent refrigerant from being released into
the atmosphere.

For identification purposes, R-134a service hoses must have a Black stripe along its length and be clearly labeled SAE J2196/R-134a. The low
pressure test hose is Blue with a Black stripe. The high pressure test hose is Red with a Black stripe, and the center test hose is Yellow with a
Black stripe.

R-134a manifold gauge sets can be identified by one or all of the following.



Labeled FOR USE WITH R-134a on set



Labeled HFC-134 or R-134a on gauge face



Light Blue color on gauge face

In addition, pressure/temperature scales on R-134a gauge sets are different from R-12 manifold gauge sets.

SYSTEM SERVICE VALVES

SCHRADER-TYPE VALVES

Schrader valve is similar in construction and operation to a tire valve. When a test gauge hose with built-in valve core depressor is attached,
Schrader stem is pushed inward to the open position and allows system pressure to reach gauge.

If test hose does not have a built-in core depressor, an adapter must be used. Never attach hose or adapter to Schrader valve unless it is first
connected to manifold gauge set.

Refrigerant R-12 Schrader-type valve cores have TV5 thread size. Refrigerant R-134a Schrader-type valve cores use M6 (Metric) threads. R-
134a valve cores can be easily identified by use of "O" rings and external spring. See

Fig. 1

.

SERVICE VALVE LOCATIONS

SERVICE VALVE LOCATIONS

NOTE:

Synthetic/PAG oils absorb moisture very rapidly, 2.3-5.6% by weight, as compared to a mineral oil
absorption rate of .005% by weight.

NOTE:

Refrigerant R-12 service hoses will ONLY be labeled SAE J2196.

NOTE:

Although similar in construction and operation to a tire valve, NEVER replace a Schrader-type valve
with a tire valve.

Vehicle

High

Low

Audi

(14)

(15)

Acura

(2)

(3)

BMW

(4)

(5)

Chrysler, Eagle & Mitsubishi

Colt, Mirage & Summit

(10)

(11)

Colt Vista & Summit Wagon

(10)

(11)

Diamante

(1)

(1)

Eclipse & Expo

(10)

(11)

Galant

(10)

(11)

REFRIGERANT RECOVERY/RECYCLING

Refrigerant recovery/recycling equipment is used to remove refrigerant from vehicle's A/C system without polluting atmosphere. To remove
and recycle refrigerant, connect the recovery/recycling system and follow instructions provided with the system.

The removed refrigerant is filtered, dried and stored in a tank within the recovery/recycling system until it is ready to be pumped back into the
vehicle's A/C system. With refrigerant stored in the recovery/recycling system, A/C system can be opened without polluting atmosphere.

Montero

(13)

(13)

Pickup & Ram-50

(10)

(11)

Precis

(12)

(12)

Stealth & 3000GT

(1)

(1)

Daihatsu

(4)

(5)

Ford Motor Co.

(4)

(5)

General Motors & Geo

(1)

(1)

Honda

(4)

(5)

Hyundai

Elantra

(4)

(5)

Excel & Scoupe

(12)

(12)

Sonata

(10)

(11)

Infiniti

(4)

(5)

Isuzu

(4)

(5)

Jaguar

(4)

(5)

Lexus

(4)

(5)

Mazda

B2200 & B2600i

(8)

(8)

Miata

(4)

(5)

Navajo

(6)

(7)

All Others

(1)

(1)

Mercedes-Benz

(4)

(5)

Nissan

(4)

(5)

Porsche

1989-92 Carrera 911 2/4

(8)

(8)

Saab

(8)

(8)

Subaru

Legacy & Loyale

(4)

(5)

SVX

(9)

(9)

Suzuki

(4)

(5)

Toyota

Pickup & 4Runner

(13)

(13)

Supra

(10)

(11)

All Others

(4)

(5)

Volkswagen

(4)

(5)

Volvo

(4)

(5)

(1)

Information is not available from manufacturer.

(2)

On high pressure line (near receiver-drier on Legend; on receiver-drier on Vigor). Use High-Side Adapter (J-25498).

(3)

On low pressure line (near right side of condenser on Legend).

(4)

On high pressure (discharge) hose/line.

(5)

On low pressure (suction) hose/line.

(6)

On high pressure line, between compressor and condenser.

(7)

On suction accumulator/drier.

(8)

On low and high pressure hoses, behind compressor.

(9)

On receiver/drier and low pressure hose (near compressor).

(10)

On compressor high pressure (discharge) hose.

(11)

On compressor low pressure (suction) port.

(12)

On compressor discharge hose and accumulator.

(13)

On compressor discharge and suction ports.

(14)

Remove high pressure cut-out switch to expose high pressure service valve.

(15)

Remove low pressure switch to expose low pressure service valve.

NOTE:

Separate sets of hoses, gauges and refrigerant recovery/recycling equipment MUST be used for R-12
and R-134a based systems. DO NOT mix R-12 and R-134a refrigerants, as their refrigerant oils and
desiccants are NOT compatible. On systems with R-134a refrigerant, use Polyalkylene Glycol (PAG)
wax-free refrigerant oil.

Copyright 2009 Mitchell Repair Information Company, LLC. All Rights Reserved.

Article GUID: A00039025

Back To Article

A/C SYSTEM PRECAUTIONS

A/C GENERAL SERVICING A/C System Servicing cautions

BEFORE OPENING THE SYSTEM

Before disconnecting any lines or fittings, the system must be completely discharged using approved refrigerant recovery/recycling equipment.

DISCHARGING A/C SYSTEM

1. Remove service valve caps and install gauges. For high side gauge hose, Adapter (D81L-19703-A) must be used to connect to high side

service valve.

2. Place open end of center hose in garage exhaust outlet or in a well ventilated area. Slightly open low side gauge valve and let refrigerant

escape slowly without loosing refrigerant oil.

3. When system is nearly discharged, using approved refrigerant recovery/recycling equipment, open high side gauge valve to release any

pressure trapped in compressor. Close valves immediately after discharging to prevent entry of moisture.

DISCONNECTING LINES & FITTINGS

1. After system is discharged, using approved refrigerant recovery/recycling equipment, carefully clean entire area around coupling nut to

prevent dirt entering system. Always use two wrenches to avoid twisting or distorting lines and fittings (hold fitting with one wrench
while loosening coupling nut with second wrench).

2. Ford spring-coupling fittings require a special coupling tool (Motorcraft YT-1056) to open or close. See procedure under Connecting

Lines and Fittings.

3. Cap or plug all LINES and FITTINGS immediately to prevent entry of air and moisture into system. Do not remove these caps until

connections are being made.

COMPONENT REPLACEMENT

When components are replaced, system oil level must be adjusted. Add refrigeration oil to replacement component. See Compressor oil Check
article, as well as COMPONENT OIL REPLACEMENT QUANTITIES chart under A/C SYSTEM SPECS article in this section.

USING R-12 REFRIGERANT - SAFETY PRECAUTIONS

1. Always work in a well-ventilated, clean area. Refrigerant (R-12) is heavier than oxygen, and will displace oxygen in a confined area.

Always wear eye protection when working around air conditioning systems and R-12. The system's high pressure can cause severe injury
to eyes and skin if a hose were to burst. R-12 evaporates quickly when exposed to atmosphere, freezing anything it contacts.

2. Use care when handling refrigerant containers. DO NOT drop or strike containers or expose refrigerant containers to excessive heat.

Containers must never be heated more than 125°F (52°C). Never expose R-12 directly to open flame.

USING INDIVIDUAL R-12 CANS

Disposable refrigerant cans (referred to as one pound cans) have a flat type seal or a screw type seal, and proper can tap must be used for each
type. Be sure sealing gasket on can tap is in good condition. A proper safety can tap will prevent refrigerant from flowing back into open can,
as tap has a one-way flow control.

MULTI-CAN DISPENSING VALVES

A multi-can dispensing valve allows attachment of several cans of refrigerant, and is a good substitute when a bulk container is not available.
Cans are installed onto each leg of multi-can dispensing valve in the same manner as the individual cans, and each leg has its own can tap.

CAN TAP INSTALLATION FLAT TYPE SEAL CANS

On cam-lock or one-piece can taps, first turn the handle outward to the fully open position. Securely engage locking lugs over the can flange,
and lock them in place by turning cam lock or locking nut. Screw tap assembly into adapter so sealing gasket is fully seated against the can
top. Turn tap inward to pierce the can and close the tap. DO NOT open tap until ready to purge the service hose or dispense refrigerant into
the system.

On 2-piece can taps, be certain tap handle is turned fully inward to the closed position. Check that locking base is turned to its outer limit.
Securely engage locking lugs over the can flange. Turn entire tap assembly (without disturbing the closed setting) downward into the locking
base to pierce the can. DO NOT open tap until ready to dispense into system.

CAUTION:

When discharging air conditioning system, use only approved refrigerant recovery/recycling
equipment. Make every attempt to avoid discharging refrigerant into the atmosphere.

NOTE:

Recent findings by the EPA indicate that R-11, R-12 and R-113 are harmful to the Earths' protective
Ozone layer. Make every attempt possible, to avoid discharging R-11, R-12 or R-113 into the
atmosphere.

CAUTION:

When R-12 is exposed to an open flame, drawn into a running engine, or detected with a Halide
(propane) leak tester, poisonous phosgene gas is formed. Keep work areas ventilated and avoid
running engines near work area.

NOTE:

Recent findings by the EPA indicate that refrigerant is harmful to the Earth's protective Ozone layer.
When discharging refrigerant avoid allowing refrigerant to enter the atmosphere. Refrigerant recovery
system should be used when discharging the system.