Page 31 - Penske_Student Guide Book

Slide Topic Content Notes
Closing the Manual Valve
 Shuts off fuel supply to the
engine

 You will have 1-3 minutes to
operate the engine and
position the vehicle in the
repair bay

Step 2: Prepare the CNG 2.5 With storage cylinders
Vehicle isolated and no leaks
detected:
Step 3: Perform Allowable  Drive the CNG vehicle
Repairs into the repair bay
 Allow the engine to run
until it stalls out due to
low fuel pressure
 Confirm that the fuel
system is depressurized
by checking the high- and
low-pressure (if
equipped) gauges and
slowly open the bleed
valve

2.6 Finish the vehicle preparation
by attaching a red “CNG
System Defueled” tag to the
driver’s door handle

3.1 Notify the shop supervisor
3.2 Cease all major repairs on

non-CNG vehicles while the
CNG vehicle is in the facility
unless the CNG repair work is
conducted in an isolated
repair bay

Step 4: Restore Fuel System and 4.1 After Minor Repair is
Remove Vehicle complete
 Open the valves on the

CNG storage cylinders
 Remove tags, start engine

and immediately drive
vehicle out of the
maintenance facility
 Once the CNG vehicle is
out of the maintenance
facility, major repair work
can begin on other
vehicles, including
welding and hot work

31