Weekly Post-Trip Inspection And Maintenance; Natural Gas Vehicle - freightliner BUSINESS CLASS M2 Driver Manual

Pretrip and Post-Trip Inspections and Maintenance
REGULATOR
INSPECT PRESSURE
RELIEF DEVICE
EVERY 2000 MILES
FILTER
DRAIN HOUSING
EVERY 1500 MILES
3600 PSIG MAX.
REPLACE ELEMENT
SERVICE PRESSURE
EVERY 3000 MILES
04/30/2010
1. High Pressure Gauge
2. Low Pressure Gauge
3. Manual Fuel Shutoff Valve
4. Fuel Fill Port
Fig. 11.9, CNG Fuel Panel
7. If equipped with an LNG fuel system, check the
fuel tank pressure gauge to ensure that pressure
is within the normal range of 120 to 150 psi (827
to 1034 kPa). If tank pressure exceeds 230 psi
(1586 kPa) and the pressure relief valve does
not open automatically, vent the tank immedi-
ately.
8. Inspect the LNG vaporizer for signs of damage
or leaks. See Fig. 11.10. Inspect the vaporizer
mounting brackets for signs of looseness.
Weekly Post-Trip Inspection
and Maintenance
Engine Compartment Inspection
WARNING
Washer fluids may be flammable and poisonous.
Do not expose washer fluid to an open flame or
any burning material, such as a cigarette. Always
comply with the washer fluid manufacturer's rec-
ommended safety precautions.
1. Check the windshield washer reservoir fluid level.
The reservoir is usually located near the right-
hand frame rail.
11.11
2
1
CYLINDERS
INSPECT CYLINDERS
EVERY 36 MONTHS
OR 36000 MILES
WHICHEVER OCCURS FIRST
NATURAL
GAS
VEHICLE
110 PSIG
OPEN VALVE
SLOWLY
4
3
f470556
2. After resetting the air intake restriction indicator
during the daily pretrip inspection, check the indi-
cator again with the engine off.
2.1
Check an indicator with graduations to see
if air restriction exceeds the value shown
in Table 11.2.
Check a go/no-go indicator without gradu-
ations to see if the colored bar shows
through the clear window.
Air Intake Maximum Restriction Values (inH
Pre-EPA07
Engine
Engines
Caterpillar
Cummins
Detroit Diesel
Mercedes-Benz
Table 11.2, Air Cleaner Element Maximum Restriction
2.2 If air restriction exceeds the maximum al-
lowable value, operate the vehicle for one
more day, making sure not to run the en-
gine over rated rpm. Refer to the engine
operation manual for more information on
rated rpm for your engine.
2.3 If air restriction exceeds the maximum
value again, replace the air cleaner. For
instructions, refer to Group 09 of the
Business Class M2 Workshop Manual .
3. If the vehicle is equipped with an Allison auto-
matic transmission, check the automatic trans-
mission fluid level.
4. Check for water in the fuel/water separator, if
equipped.
IMPORTANT: When draining fluid from a
fuel/water separator, drain the fluid into an
appropriate container and dispose of it prop-
erly. Many jurisdictions now issue fines for
draining fuel/water separators onto the
ground.
4.1 Place a suitable container under the fuel/
water separator.
NOTE: A hose may be used to direct water
into the container. Use a hose with a ½-inch
pipe thread on DAVCO models.
O)
2
EPA07 and
Newer Engines
25 —
25 25
20 22
22 22