TM 9-6115-668-13 Item Location Not Fully Mission No. Interval Item to Check/Service Procedure Capable  if: 92 After Air hoses 93 After Air hose 94 After Air pipe inlet 95 After Gas exhaust manifold 96 After 97 After Gas exhaust intermediate pipe Fuel pipes 98 After Oil hoses 99 100 101 102 After Plastic lever After Ground strap After Control   cable After Connector X103 Table  2-4  Operator  Preventive  Maintenance  Checks  and  Services-continued. ENGINE   COMPARTMENT- continued Check that air hoses between heat- ing unit and heat exchanger box, and between heat exchanger box and diesel engine are firmly attached and undamaged. Check that air hose above oil hose is firmly attached to heat exchanger housing and undamaged. Check that air pipe inlet is firmly at- tached to heating unit, and points to- ward the terminal box. Check that gas exhaust manifold is firmly attached to heating unit, and is properly connected and aligned with gas exhaust intermediate pipe. Check that gas exhaust intermediate pipe is firmly attached to base frame. Check that both fuel pipes are firmly attached to heating unit with no leaks. Check that both oil hoses are firmly attached to diesel engine oil sump with no leaks. Check that plastic lever on heating unit terminal box is all the way to the left, and is caged. Inspect ground strap and ground strap connections to heating unit and base   frame. Check that control cable is firmly connected to connector on terminal box, and is not damaged. Check labeling  of  J102. Check  that  connector  X13  is  prop- erly assembled and not damaged. Check labeling of X103. Air hoses are loose or damaged. Air hose is loose or damaged. Air pipe inlet points in the other direction. Gas exhaust manifold is not connected to gas exhaust inter- mediate   pipe. Gas exhaust inter- mediate pipe is loose. Fuel pipes loose or damaged. Any fuel leak. Oil hoses are loose or damaged. Plastic lever is not all the way to the left. Ground strap is loose or   damaged. Control cable is loose or   damaged. Connector is loose or damaged. 2 - 3 2