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
N
OT
C
ONTROLLED
FCCC MT CNG
84
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
84
Fuel System Defueling
Step 19
Use an 11/16-in wrench to reinstall bleed valve in HP fuel filter port.
Torque bleed valve to 25 ft-lbs (33.9 Nm).
HP fuel filter
bleed valve
Step 20
Close pressure relief nut on bleed valve using a 7/16-in wrench.
To increase service life, ensure proper valve performance, and prevent leakage, apply
only enough torque to pressure relief nut as is required to achieve positive shutoff per
Swagelok
®
instructions.
pressure relief nut
HP fuel filter
bleed valve
Complete repair work as needed.
Step 22
Install pressure relief cap and pressure relief nut cap on bleed valve.
Caps must be installed to prevent foreign object debris (FOD)
intrusion. If caps and are not present, reference service parts catalog
for replacement.
pressure relief cap
pressure relief nut cap
Leak check procedure DSM.0037 must be performed before vehicle may be cleared for
operation.
