Daimler Freightliner Business class M2 Series, Maintenance Manual, Page: 121 / 149

6. Spin the bowl onto the new element, then spin
them both onto the filter head, snugly, by hand
only.
IMPORTANT: Do not use tools to tighten the
bowl and element.
7. Connect the water sensor and heater connectors
if equipped.
8. If equipped with a primer pump, prime the
fuel/water separator.
8.1 Loosen the vent plug. Then operate the
primer pump until the fuel purges at the
vent plug.
8.2 Close the vent plug.
9. Start the engine and check for fuel leaks.
10. Shut down the engine and correct any fuel leaks.
Davco Fuel Pro® 232 and 233
Replace the fuel/water separator element ( Fig. 2 )
only when the filter element is completely covered.
In the event of an emergency, when the filter needs
replacement but a Davco filter is not available, a
temporary filter can be used. For instructions, see
Chapter 14 of the Business Class® M2 Driver’s
Manual.
WARNING
Diesel fuel is flammable and can ignite if exposed
to an open flame, intense heat, or other ignition
source. Do not drain fuel near, or expose fuel
vapor to open flame or intense heat. Exposure to
open flame or intense heat could start a fire, pos-
sibly resulting in personal injury or property dam-
age. When working on a fuel system, have a fire
extinguisher within easy reach.
1. Drain the fuel below the collar level.
2. Using Davco wrench 232002, remove the filter
collar. Then remove the filter cover.
3. Remove the element and dispose of it properly.
4. Install a new element. Make sure the grommet is
in place on the filter stud.
5. Install a new cover seal on the filter cover.
6. Using the collar, attach the filter cover with the
spring to the base.
IMPORTANT: Tighten the collar by hand only.
7. Remove the filter vent. Then fill the fuel/water
separator with fuel until the fuel level is 1 inch
(2.5 cm) above the collar.
8. Install the filter vent on the fuel/water separator.
9. Start the engine and raise the rpm for one min-
ute to purge air.
Davco Fuel Pro® 382
Replace the fuel/water separator element only when
the filter element is completely covered.
In the event of an emergency, when the filter needs
replacement but a Davco filter is not available, a
temporary filter can be used. For instructions, see
Chapter 13 of the Business Class® M2 Driver’s
Manual .
WARNING
Diesel fuel is flammable and can ignite if exposed
to an open flame, intense heat, or other ignition
source. Do not drain fuel near, or expose fuel
vapor to open flame or intense heat. Exposure to
open flame or intense heat could start a fire, pos-
sibly resulting in personal injury or property dam-
age. When working on a fuel system, have a fire
extinguisher within easy reach.
1. Drain the fuel below the collar level. See Fig. 3 .
2. Using Davco wrench 380134 or 382002, remove
the filter collar. Then remove the filter cover.
3. Remove the element and dispose of it properly.
4. Install a new element. Make sure the grommet is
in place on the filter stud.
5. Install a new cover seal on the filter cover.
6. Using the collar, attach the filter cover with the
spring to the base.
IMPORTANT: Tighten the collar by hand only.
7. Remove the filter vent. Then fill the fuel/water
separator with fuel until the fuel level is 1 inch
(2.5 cm) above the collar.
8. Install the filter vent on the fuel/water separator.
Fuel
47
Business Class M2 Maintenance Manual, August 2015
47/2
Property of American Airlines