DO’S & DONT’S 10. DO’S Keep suction discharge hose assembly and • liquid line capped until right before assembly of joint. Ensure that protective sleeves are in proper • location where specified Lubricate all pre-installed O-rings with specified • refrigerant mineral oil (Reference assembly instructions) 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 torquing joint nuts. Seat male end form with O-ring in its female • cavity prior to torquing 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 • insure tightness, screw caps down until cap seal contacts valve housing and then give it 1/4 to 1/2 turn more. Assemble dual O-ring fitting joints as follows: • a) Oil bore with a specified oiling tool using mineral 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 discharge hose assembly to the compressor. DO: Oil O-rings with mineral oil prior to • assembling a refrigerant joint. Pre-oiled O-rings do not require oiling unless the oil has been absorbed into the O-ring and the surface is dry. DO: Use specified mineral 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 • obstructions 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 trapping 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 condenser. 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 operator tightens the joint to required torque. Use PAG oil to lubricate O-rings. • Lubricate seal washers prior to attaching • refrigerant lines to components. Use PAG lubricant to lubricate O-rings. • HVAC W/O ETC 53
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