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FUEL SYSTEM
TABLE OF CONTENTS
1
INTRODUCTION ....................................................................................................................1
A. CNG LAYOUT (ON VEHICLE
)
.................................................................................................... 2
2.
CNG FUEL SYSTEM COMPONENTS
...........................................................................3
A. CNG CYLINDER................................................................................................................3
B. CYLINDER VALVE ............................................................................................................5
C. LOW PRESSURE CNG FILTER......................................................................................10
D. PRESSURE GAUGE .......................................................................................................13
E. PRESSURE REGULATOR..............................................................................................14
F. HIGH PRESSURE (H.P) SENSOR..................................................................................19
G. CNG RECEPTACLE VALVE ...........................................................................................21
3
.
CNG TUBE FITTINGS / JOINTS TIGHTENING INSTRUCTIONS ......................................24
A. SWAGING PROCEDURE................................................................................................24
B. PROCEDURE FOR NPT THREAD ASSEMBLY .............................................................26
4.
CNG LEAK DETECTION TESTING ....................................................................................28
5.
TROUBLE SHOOTING ........................................................................................................29