Handling Refrigerant HFC-134a (R-134a)
- Always wear goggles to protect your eyes.
- Avoid you direct contact to liquid refrigerant.
- Do not heat refrigerant container higher than 40°C (104°F).
- Do not discharge refrigerant into atmosphere.
- Do not allow liquid refrigerant to touch bright metals. Refrigerant combined with moisture is corrosive and will tarnish surfaces of bright metals including chrome.
Refrigerant Line
- Never use heat for bending pipes. When bending a pipe, try to make its bending radius as slight as possible.
- Keep internal parts of air conditioning free from moisture and dirt. When disconnecting any line from system, install a blind plug or cap to the fitting immediately.
- When connecting hoses and pipes, apply a few drops of compressor oil (refrigerant oil) to seats of coupling nuts and O-ring.
- When tightening or loosening a fitting, use two wrenches, one for turning and the other for support.
- Tighten flared nuts by the following specified torque.
Tightening torque
8 mm pipe: 13 N.m (1.3 kg-m, 9.5 Ib-ft)
12 mm pipe: 23 N.m (2.3 kg-m, 16.6 Ib-ft)
14.5 mm pipe: 33 N.m (3.3 kg-m, 23.8 Ib-ft)
- Route drain hose so that drained water does not make any contact to vehicle components.
- If pipes or hoses are replaced, replenish specified amount of compressor oil to compressor suction side by referring to "OPERATION PROCEDURE FOR REFRIGERANT CHARGING ".