TM 9-2815-225-34&P 3-92.  ENGINE DYNAMOMETER TESTING THIS TASK COVERS: a.  Setup d.  Smoke Level Check b.  Break-in Running e.  Final Check c.  Power Check INITIAL SETUP: APPLICABLE MODELS REFERENCES (TM) All None SPECIAL TOOLS TROUBLESHOOTING REFERENCES Blow-by measuring tool (15434) 3375150 None TEST EQUIPMENT EQUIPMENT CONDITION Opacity meter Engine mounted to dynamometer test stand (para. 3-91). MATERIALS/PARTS None SPECIAL ENVIRONMENTAL CONDITIONS None PERSONNEL REQUIRED Automotive repairman MOS 63H GENERAL SAFETY INSTRUCTIONS Allow adequate ventilation for engine exhaust gases. LOCATION/ITEM ACTION REMARKS WARNING Allow adequate ventilation for engine exhaust gases.  Failure to comply may result in brain damage or death to personnel. a.  Setup 1.  Breather tube (2) Cover or plug. 2.  Blow-by measuring tool (4) Install in place of oil filler cap (1).   Use blow-by measuring tool (3375150) (4) and water manome- ter.  Fill to 0 mark at middle of scale.  Close all other engine open- ings that would allow blow-by pressure to escape. 3.  Air compressor (7) Connect to a 0.125-0.130 in. Provides dynamic load for air (3.175-3.302 mm) diameter orifice compressor (7). adapter (5) located downstream from a 150 psi (1034 kPa) pressure relief valve (6). 3-680