NEXON EV SERVICE MANUAL

FATC 54 17. DO’s & DONT’s DO’s  Keep suction discharge hose assembly and liq- uid line capped until right before assembly of joint.  Ensure that protective sleeves are in proper lo- cation where specified  Lubricate all pre-installed O-rings with specified refrigerant mineral oil (Reference assembly in- structions) prior to assembly of joints. Prelubricated, preinstalled O-rings do not require lubrication prior to installation unless the oil has absorbed into the O-ring and the surface is dry.  Seat O-ring in its female cavity prior to hand starting and torqueing joint nuts.  Seat male end form with O-ring in its female cav- ity prior to torqueing the mini block-fitting joint.  Use two wrenches for making each refrigerant joint connection - a calibrated torque wrench on the nut and a backup wrench on the mating nut or a block fitting wrench on the block.  Clip or secure hoses and lines as specified.  Be sure caps are tight on access valves. To in- sure tightness, screw caps down until cap seal contacts valve housing and then give it ¼ to ½ turn more.  Assemble dual O-ring fitting joints as follows: a. Oil bore with a specified oiling tool using POE oil. b. Do not oil O-rings. c. Align end forms and then push together completely. d. Tighten joint to specified torque using a backup wrench.  Rotate stock on a first-in first-out basis.  Finger start all mounting bolts that thread into compressor or brackets. Also, finger start the bolt securing the block fitting on the suction dis- charge hose assembly to the compressor.  DO: Oil O-rings with POE oil prior to assembling a refrigerant joint. Pre-oiled O-rings do not re- quire oiling unless the oil has been absorbed into the O-ring and the surface is dry.  DO: Use specified POERL68 oil to lubricate O- rings (Reference assembly instructions) DO: Use correct refrigerant O-rings in the vehicle refrigerant system. (Refer to assembly instructions for part numbers). DON’TS  Make connections with bends, kinks, or obstruc- tions in lines.  Use bolt or nut to “walk” manifold block or mini block into it’s mating part. Proper technique is with O-ring in seat, push blocks together trap- ping seal washer before running up and tightening the fastener.  Allow hoses and lines to rub against adjacent parts.  Bend metal lines to ease assembly. Do not use lines as a handle to lift the compressor or con- denser.  Use lines contaminated with water.  Allow hoses and lines to directly contact sheet metal or touch hot engine components.  Use bent twisted, kinked or damaged hoses and lines.  Combine refrigerant joint assembly operations with “dirty” operations such as gritty brackets, oily suspension components, etc.  Process “broken” operations where one operator loosely assembles a joint and a subsequent op- erator tightens the joint to required torque.  Use PAG oil to lubricate O-rings.  Lubricate seal washers prior to attaching refrig- erant lines to components.  Use PAG lubricant to lubricate O-rings.