Half/Pack
®
Issued April 2018
Compressed Natural Gas (CNG) Option
Copyright 2018, Heil Environmental
Printed in the U.S.A.
Compressed Natural Gas (CNG) Option
198
DAILY SYSTEM INSPECTION
Inspect the following items each day before vehicle operation:
1. Make sure all manual tank valves and the red-handled emergency shutoff valve on the FMM are in the OPEN
position.
2. Check the high pressure gauge to make sure enough fuel is on-board and refuel if necessary.
3. Drain the low pressure filters located at engine per the engine manufacturers’ recommendation.
4. Turn the ignition key to the on position, and watch the low pressure gauge. It should show about 125 psi.
5. Check the dashboard fuel gauge to make sure it is functioning.
6. Check the entire fuel system for any signs of damage or wear. Include checks for:
a. Gas leaks – Smell for gas, look for frost or ice and listen for hissing noises at joints and components.
b. PRD components - Make sure all PRD vent line caps are in place.
c. Structural damage - Housings, covers bent or damaged, fasteners missing or loose, check inside of tailgate for
dents over 1/4” deep, or punctures.
7. If any system components or structural parts are damaged, perform a detailed inspection.
If everything checks out good, the vehicle is cleared for operation. If anything is wrong, a qualified CNG system technician
should make the necessary repairs.
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