TM 9-6115-624-BD
CHAPTER 5
FUEL SUPPLY SYSTEM
BDAR FIXES SHALL BE USED ONLY IN COMBAT OR FOR TRAINING
AT THE DISCRETION OF THE COMMANDER
(AUTHORIZED TRAINING FIXES ARE LISTED IN APPENDIX E)
IN EITHER CASE DAMAGES SHALL BE REPAIRED BY STANDARD
PROCEDURES AS SOON AS PRACTICABLE
Section I. INTRODUCTION
5-1.
Scope. Fuel supply systems consist of fuel storage tanks, fuel pumps, filters and the tubes and hoses needed to
route the fuel to the engine. Some systems use electrical fuel pumps located in the tanks and a mechanized engine
mounted fuel pump to move the fuel. Other systems mount the fuel storage tank in a location which allows gravity flow
of the fuel to the engine assisted by an engine mounted mechanical pump. A diesel engine can be severely damaged by
using unfiltered fuels. Two filters are mounted in series to provide a primary and secondary filtration system to trap dirt
and other contaminants. Fuel filters must be checked for accumulations of dirt and water.
5-2.
Assessment Procedure. Fuel supply assessment procedures are structured using the logic process shown in
WARNING
Do not weld on fuel tanks unless they have been thoroughly drained and purged
of fuel. Failure to heed this warning may result in an explosion and fatal injuries.
Use personal protective equipment such as eye goggles, gloves, and hearing
protection when performing BDAR actions. Serious injury can result when such
equipment is not used.
5-3.
Repair Procedure Index.
Damage
Paragraph
Fuel Tank Leaks .................................................................................................................................
Fuel Tank Substitute ...........................................................................................................................
Fuel Pump, Interchangeability ............................................................................................................
Fuel Pump, Mechanical Failure ..........................................................................................................
Seals, Fuel System, Leak ...................................................................................................................
Fittings, Leaking .................................................................................................................................
5-14
Fuel Line (Low Pressure Rupture) .......................................................................................................
Fuel Injector Line, Rupture ..................................................................................................................
Fuel Filter Clogged or Frozen .............................................................................................................
5-1
