DSM.0008 Ver 1.0
FCCC MT-45 / MT 55 CNG Diagnostics Service Manual
February 15, 2022
P
RINTED AND
D
OWNLOADED
C
OPIES ARE
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OT
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ONTROLLED
FCCC MT CNG
70
FCCC MT CNG
DSM.0008 Ver 1.0
FCCC MT-45 / MT 55 CNG Diagnostics Service Manual
February 24, 2022
P
RINTED AND
D
OWNLOADED
C
OPIES ARE
N
OT
C
ONTROLLED
70
Fuel System Depressurization
FCCC MT CNG
ALWAYS use personal protective equipment (PPE) when working around
pressurized fuel systems.
Verify parking brake is engaged, wheels are chocked, and ignition switch is in
OFF position.
Tools and Supplies
General Safety Precautions
Item
Purpose
safety glasses
eye protection
shop rags
clean fuel system components before and after repair
flashlight
illuminate components
mirror
observe backside of fittings while performing leak check
7/16-in wrench
open and close bleed valve pressure relief nut
torque wrench
torque bleed valve
11/16-in socket
use with torque wrench
Depressurization
is required for fuel delivery system component repairs.
Depressurization
AND
defueling
are required when repairing or replacing fuel storage
system components and associated cylinder straps, isolators, and bracket assemblies.
Depressurization must be performed in well-ventilated area.
Install proper lockout/tagout (LOTO) device and observe all LOTO practices.
