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Page Title: APPENDIX H TORQUE LIMITS
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TM 10-4320-351-14 APPENDIX H TORQUE LIMITS H-1 INTRODUCTION. This  appendix  provides  general  torque  data  to  allow  you  to  determine  the  torque  requirements  for  a  pumping  assembly fastener if a specific value is not listed in the text.  Specific values are provided for the most critical requirements.  Most threaded   fasteners   are   covered   by   specifications   that   define   mechanical   properties   such   as   tensile   strength,   yield strength,  proof  load  and  hardness.    These  specifications  are  carefully  considered  in  initial  selection  of  fasteners  for  a given application.  To assure continued satisfactory performance, replacement fasteners should be of the correct strength, nominal diameter, thread pitch, length and finish. Most original equipment fasteners (English or metric) are identified with markings or numbers indicating the strength of the fastener.  These markings are identified in the paragraphs that follow.  Attention to these markings is important in assuring that the proper replacement fasteners are used. H-2 PUMPING ASSEMBLY SPECIFIC TORQUE DATA. Fuel Transfer Pump Specific Torque Data Item Torque Value Impeller Shaft Nut 100 - 110 ft lb (135.6 - 149.2 Nm) Engine Specific Torque Data Item Torque Value Crankshaft Support Screws 190-195 in lb (21-23 Nm) Crankshaft Center Bearing Support 190-195 in lb (21-23 Nm) Front Crankshaft Support 190-195 in lb (21-23 Nm) Connecting Rod Bearing Screws 26-30 ft lb (35-41 Nm) Oil Pump Cover Screws 43-52 in lb (5-6 Nm) Timing Cover Screws 190-195 in lb (21-23 Nm) Cylinder Head Retaining Nuts Step 1: 15 ft lb (20.4 Nm), Step 2: 23 ft lb (31.2 Nm), Step 3: 30 ft lb (43.7 Nm) H-1

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