TM 9-2815-225-34&P 3-21.  ENGINE RETARDER REMOVAL THIS TASK COVERS: Removal INITIAL SETUP: APPLICABLE MODELS TROUBLESHOOTING REFERENCES All Para. 2-8 SPECIAL TOOLS EQUIPMENT CONDITION None    Air aftercooler removed (para. 3-20).    Rocker cover and gasket removed TEST EQUIPMENT (TM 9-2320-273-20 or TM 9-2320-283-20). None    Engine lifting brackets removed (TM 9-2320-273-20 or TM 9-2320-283-20). MATERIALS/PARTS Gasket (75078) 010279 SPECIAL ENVIRONMENTAL CONDITIONS Preformed packing (75078) 010180 Work area clean and away from blowing dust and dirt. PERSONNEL REQUIRED Automotive repairman MOS 63H GENERAL SAFETY INSTRUCTIONS None REFERENCES (TM) TM 9-2320-273-20 TM 9-2320-283-20 LOCATION/ITEM ACTION REMARKS NOTE The following procedure covers removal of one engine brake retarder. The removal of the remaining two engine brake retarders is similar. Removal 1. Six nuts (3) and two locking Remove from six studs (1).  Bend If not removed, it will be plates (4) down tabs on locking plates (4) necessary to remove fan support located on inside two studs (1) brace and spacers along with nuts only. (3). 2. Engine brake retarder (5)   Remove from rocker arm housing Mark location of each engine (7) by pulling straight up. brake retarder (5) if more than one will be removed. 3. Gasket (2) and preformed Remove from rocker arm housing Gasket (2) and preformed packing packing (6) (7) or engine brake retarder (5). (6) may remain on engine brake retarder (5) or rocker arm housing (7).  Discard gasket (2) and pre- formed packing (6). FOLLOW-ON TASKS: For repair of engine retarder (para. 3-50). For installation of engine retarder (para. 3-86). 3-48