Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Installation

INSTALLATION

PROCEDURE

1. INSTALL PIPING CLAMP

(a) for Low Pressure:

(1) Remove the vinyl tape from the open ends of the No. 2 air conditioner tube and accessory assembly and suction hose sub-assembly.

(2) Install a new piping clamp to the suction hose sub-assembly. NOTICE: Securely engage the inside step of the piping clamp into the groove of the suction hose sub-assembly. Do not widen the opening of the piping clamp more than the diameter of the suction hose sub-assembly when installing it. Do not install the piping clamp with the large diameter section in the wrong direction.

*1 Suction Hose Sub-assembly *2 Piping Clamp *a Groove

(3) Thoroughly coat 2 new O-rings and the contact surface of the suction hose sub-assembly with compressor oil.

Compressor Oil:

ND-OIL 12 or equivalent

(4) Install the 2 O-rings to the suction hose sub-assembly.

NOTICE:

Keep the O-rings and sealing surface of the No. 2 air conditioner tube and accessory assembly free from foreign matter.

(5) Engage the No. 2 air conditioner tube and accessory assembly and suction hose sub-assembly by matching the alignment marks. NOTICE: Engage the parts by holding the pipe, not the piping clamp.

*a Large Diameter Section of Piping Clamp *b Alignment Mark

(6) Securely insert the piping clamp to the point where the large diameter section of the piping clamp is covered by the No. 2 air conditioner tube and accessory assembly. HINT: When inserting, make sure that a click sound is heard. Check that the suction hose sub-assembly is securely inserted by pulling it.

*a Large Diameter Section of Piping Clamp

(b) for High Pressure:

(1) Remove the vinyl tape from the No. 2 air conditioner tube and accessory assembly and air conditioner tube and accessory assembly.

(2) Sufficiently apply compressor oil to 2 new O-rings and the fitting surfaces of the air conditioner tube and accessory assembly.

Compressor Oil:

ND-OIL 12 or equivalent

(3) Install the 2 O-rings to the air conditioner tube and accessory assembly.

NOTICE:

Keep the O-rings and sealing surface of the No. 2 air conditioner tube and accessory assembly free from foreign matter.

(4) Install the No. 2 air conditioner tube and accessory assembly to the air conditioner tube and accessory assembly.

(5) Install the piping clamp to the No. 2 air conditioner tube and accessory assembly. NOTICE: Make sure that the piping clamp is engaged securely with no gap.

*a Correct *b Incorrect *c No Gap *d Gap

2. INSTALL PIPING CLAMP (w/ Rear Air Conditioning System)

(a) for Low Pressure:

(1) Remove the vinyl tape from the No. 2 air conditioning tube and accessory assembly and air conditioning hose and accessory.

(2) Sufficiently apply compressor oil to 2 new O-rings and the fitting surfaces of the No. 2 air conditioning tube and accessory assembly.

Compressor Oil:

ND-OIL 12 or equivalent

(3) Install the 2 O-rings to the No. 2 air conditioning tube and accessory assembly.

(4) Install the No. 2 air conditioning tube and accessory assembly to the air conditioning hose and accessory.

(5) Install the piping clamp to the air conditioning hose and accessory. NOTICE: Make sure that the piping clamp is engaged securely with no gap.

*a Correct *b Incorrect *c No Gap *d Gap

(b) for High Pressure:

(1) Remove the vinyl tape from the No. 2 air conditioning tube and accessory assembly and air conditioning hose and accessory.

(2) Sufficiently apply compressor oil to 2 new O-rings and the fitting surfaces of the No. 2 air conditioning tube and accessory assembly.

Compressor Oil:

ND-OIL 12 or equivalent

(3) Install the 2 O-rings to the No. 2 air conditioning tube and accessory assembly.

(4) Install the No. 2 air conditioning tube and accessory assembly to the air conditioning hose and accessory.

(5) Install the piping clamp to the No. 2 air conditioning tube and accessory assembly. NOTICE: Make sure that the piping clamp is engaged securely with no gap.

*a Correct *b Incorrect *c No Gap *d Gap

3. CHARGE AIR CONDITIONING SYSTEM WITH REFRIGERANT

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4. WARM UP ENGINE

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5. INSPECT FOR REFRIGERANT LEAK

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