Q: How to replace the A/C Orifice Tube on Buick Century?
A: The first step to replace the A/C Orifice Tube requires the removal of the condenser tube. The technician should employ the Orifice Tube Remover (J 26549-E) to pull out the A/C Orifice Tube. Check whether the tube shows signs of damage because a broken plastic frame requires a new tube. A replacement tube is necessary if the inlet filter shows damage from fine gritty material buildup or if the filter itself becomes damaged. The inlet filter must get cleaned with low-pressure shop air until it shows proper cleaning results when removing metal particles before reusing it without replacing the O-ring seals. Never apply solvents or chemicals when you need to clean the porous plastic inlet filter of the A/C Orifice Tube. It is necessary to install fresh O-ring seals when reusing an A/C Orifice Tube after cleaning while using mineral base 525 viscosity refrigerant oil for lubrication. Place the A/C Orifice Tube in the condenser tube while holding its edge only and ensuring that the inlet filter remains untouched until complete insertion before replacing the condenser tube.
Q: How to Properly Handle an A/C Orifice Tube Replacement on Buick LeSabre?
A: The replacement process for the A/C Orifice Tube requires the usage of A/C Refrigerant Recovery, Recycling and Recharging (ACR4) System (J 39500-B) to extract refrigerant from the A/C system. First remove the A/C evaporator hose from retaining clips and cut it at the A/C Orifice Tube position to take out the A/C Orifice Tube from the line. Apply mineral base 525 viscosity refrigerant oil to the A/C Orifice Tube O-ring before its installation into the evaporator hose while properly orienting the short screen toward the evaporator and its arrow mark. You should assemble the A/C evaporator tube then tighten its O-ring joint connections to 27 N.m (20 lb ft). Proceed by reattaching the A/C evaporator hose to retaining clips then charge the system and complete the process with the Electronic Halogen Leak Detector (J 39400-A).
Q: How to Properly Service and Replace an A/C Orifice Tube on Buick Regal?
A: The condenser tube needs removal as the first step when replacing the A/C Orifice Tube. An operator should use the Orifice Tube Remover (J 26549-E) to extract the A/C Orifice Tube. The porous plastic inlet filter of the A/C Orifice Tube must never receive cleaning with solvents or chemicals. The tube requires inspection for detectable plastic frame breakage and filter clarity. Replacement of either defect is necessary. The A/C Orifice Tube inlet filter may be reused after cleaning with low-pressure shop air yet discarding the O-ring seals. The installation process requires application of mineral base 525 viscosity refrigerant oil to the new O-ring seal. Reinstall the new O-ring seals whenever you decide to keep the use of the A/C Orifice Tube. Place the A/C Orifice Tube edge carefully upon the condenser tube while ensuring your hands avoid the inlet filter and push it until you achieve full seat. After repositioning the condenser tube conduct a leak test on component fittings through the Halogen Leak Detector (J 39400-A).