4 S t A N D A R D E x t E R N A L C L E A N I N G To maintain efficiency and assure maximum life of a MESABI Core reasonable care must be taken when cleaning Most radiator shops use a hot alkaline soap caustic soda or chemical additives in their boilout tanks which attacks solders If a MESABI tube is soaked in such a solution the solder bond between the finning and tube will be adversely affected If it is known that the particular solution used is not harmful to solder then it will not hurt the solder used on the MESABI tube Be sure to completely rinse the cleaned tubecore in clean water after removing from the boilout tank In most cases it may be best to blow out any dry dirt with a high pressure air gun prior to washing the core with a high pressure hot water washer For general external cleaning a high pressure hot water washer with or without soap can be used at pressures up to 1200 psi 8274 KPa CAU t I o N t o prevent fin deformation y ou m ust stay a few inches away from the core and spray straight into the core not at an angle If the cooler is still in the machine you may have to use an offset angled nozzle so that you can spray straight into the core If there is any doubt try your cleaning method on a small portion of the core first It is important to start on the air exit side Work from the top to the bottom Concentrate on small areas and work slowly Wash until the water exiting the opposite side is free from dirt and debris Complete this side and then repeat the process from the other side E P o x y C o A t E D C o R E S Epoxycoated cores must be cleaned with care to assure the coating is not damaged 1 A high pressure hot water washer can normally be used Use a fresh water supply Water temperature should not exceed 180 0 F Do not steam clean The nozzle should be kept approximately 12 inches away from the core C AU t I o N w e do not recommend a pressure rating because as epoxy ages the coating does become brittle and might be damaged at higher pressures w e recommend that you try your cleaning method on a portion of a single tube first 2 Wash the core thoroughly and methodically starting at the top and working towards the bottom Do not wash in one area for extended periods The core will be clean when the water exiting the core is clean 3 Blow off excess water with air Epoxy coatings are not meant for submergent duty LM Radiator does not warrant against corrosion but this coating properly cared for will help increase the service life and efficiency of your cooling system I N t E R N A L C L E A N I N G In most cases just flushing the inside of the tubes with a high pressure hot water washer with soap will do the job Rinse thoroughly with clean water h E L P F U L h I N t S Clean the core prior to removing tubes To avoid bending or kinking tube ends reduce the a n g l e o f t h e t u b e a s i t s b e i n g p u l l e d f r o m t h e t o p s e a l If the core has a center tank remove the top core tubes and seals first If the core has an ITS Individual Tube Support or stay system with support bars mark the bars front and back before removing to ease reassembly To assist in the removal process spray WD40 on the top end of tubes If tubes are difficult to remove try using the breaker tool and removal tool simultaneously S t E P 1 Loosen the tube by using Breaker Tool LM PN 37239 as shown in Fig 1 The Breaker Tool should be placed at top or bottom not at middle when freeing tube from seal Lightly twist the tube back and forth to loosen tube from seals S t E P 2 After tube is free place upper jaw of Installation Tool PN 48350 around the round portion of tube just below the flattened portion Place lower jaw on top of bottom seal see Fig 2 Squeeze handles of tool together and raise tube only enough to clear bottom seal C l e a n i n g t u b e R e m o v a l Fig 2 Fig 1