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
44
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
44
Crank, No-Start
Step 12
With all lines and connections secured, pressurize system as per procedure at the end of
Depressurization section.
Record LP fuel gauge pressure.
Pressure is 120 psi (8.3 Bar):
Retry crank. If no start,
Reprogram / replace ECM.
Pressure is less than 120 psi (8.3 Bar):
Proceed to Step 13.
Step 14
Remove LP fuel hose from LP fuel filter.
Remove LP fuel hose from
fuel line adaptor tool
using the line disconnect tool.
With the LP fuel hose removed, use compressed air to verify LP fuel hose flow is unobstructed.
Compressed air flows:
Proceed to Step 15.
Compressed air does not flow:
Replace LP fuel hose.
Complete leak check procedure.
Perform System Verification Procedure.
LP fuel
filter
LP fuel
hose
fuel line adaptor tool
ALWAYS verify fuel system has been depressurized!
Step 13
Depressurization complete:
Proceed to Step 14.
Depressurize fuel system; refer to Depressurization section of this manual.
Observe organizational LOTO practices; install lockout/tagout (LOTO)
devices.
Fitting configurations
may vary
