2007 Harley Davidson FXDWG Dyna Wide Glide Service Manual


2007 FXDWG Dyna Wide Glide Service Manual


This 2007 Harley Davidson Dyna FXDWG Wide Glide service manual download describes the service procedures for the complete motorcycle. Follow the Dyna maintenance schedule recommendations to ensure that the chopper is in peak operating condition and the emission levels are with in the standards set by states/county Resources Board. Performing the scheduled maintenance on your Dyna is very important. It compensates for the initial wear that occurs during the life of the bike.
All chapters in this Harley Dyna 2007 Wide Glide service manual applies to the whole motorcycle and illustrates procedures for the removal and installation of components that are in a detailed step-by-step fashion.
Most all HD (H-D) 2007 Dyna FXDWG service manual chapters start with an assembly or systems illustration, diagrams, exploded parts view, quality pictures, service information and troubleshooting for the section. The subsequent pages give detailed service/repair procedures. If you don't know the source of the trouble, go to the troubleshooting page for a list of causes and effects to determine the problem.
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3-16      2007 Dyna: Engine

OIL PRESSURE                                                                                                               

OIL PRESSURE INDICATOR LAMP                                          

See Figure 3-13. The red OIL PRESSURE indicator lamp illu-
minates to indicate improper circulation of the engine oil. The
lamp illuminates when the ignition is first turned on (before
the engine is started), but should be extinguished once the
engine is running.


If the oil pressure indicator lamp remains lit, always                           Figure 3-13. Oil Pressure Indicator Lamp
check the oil supply first. If the oil supply is normal and
the lamp is still lit, stop the engine at once and do not
ride further until the trouble is located and the necessary
repairs are made. Failure to do so may result in engine
damage. (00157a)
If the indicator lamp is not extinguished, it may be the result of
a low oil level or diluted oil supply. In freezing weather, the oil
feed and return lines can clog with ice or sludge. A problem in
the lamp wiring, faulty oil pressure sending unit, damaged oil
pump, plugged oil filter element, incorrect oil viscosity, broken
or weak spring in the oil pressure relief valve and/or damaged
or incorrectly installed O-rings in the engine may also cause
the indicator lamp to remain on.
To troubleshoot the problem, always check the engine oil level
first. If the oil level is OK, determine if oil returns to the pan
from the oil return hose. If oil does not return, shut off the
engine until the problem is located and corrected.


                                                                                                       2007 Dyna: Engine    3-15

BREATHER OPERATION                                                                                                  3.6

GENERAL                                                             d0440x3x

The crankcase breather system relieves crankcase pressure
produced by the downstroke of the pistons and allows crank-
case vapors vacated from each cylinder to be directed into
the air filter element. Through effective recirculation of crank-
case vapors, the system serves to eliminate the pollutants
normally discharged from the crankcase.
See Figure 3-12. As each piston pushes downward on its
power and intake stroke, displaced air in the flywheel com-
partment is vented through the crankshaft roller bearing into
the cam compartment and then up the push rod covers (1)
into the rocker housing.
Air rushes under the rocker arm support plate, which is ele-
vated slightly, and passes through an opening at the bottom
of the plate to enter the breather baffle compartment (2).
In the baffle compartment, the flow of air passes upward
through the oil filter gauze, where the oil is removed from the
air. Two pin holes in the rocker arm support plate act as drain
holes to rid the baffle compartment of the oil separated from
the air.
Passing through the oil filter gauze, the flow of air passes
through the umbrella valve (3) into the breather compartment.                                            1
The flaps of the umbrella valve only allow air to be vented one
way, rising to allow the passage of air, but then falling back
                                                                    1.   Push rod cover
into place to seal the vent holes as the flow of air stops.
                                                                    2.   Breather baffle
In the breather compartment, the flow of air reverses direction      3.   Umbrella valve
passing downward through holes aligned in the breather baf-         4.   Air cleaner backplate bolt
fle, rocker arm support plate and rocker housing. Exiting the        5.   Breather tube
rocker housing, the air enters a passageway cast into the top
of the cylinder head. Proper orientation of the rocker housing                     Figure 3-12. Breather Air Flow
gasket is critical for effective sealing of this passageway.
Flowing through the cylinder head passageway, the air passes
through a drilling in the air cleaner backplate bolt (4) and then
through a breather tube (5) into the air filter element.
Air cleaner mounting without installation of the breather tubes
allows crankcase vapors to be vented into the atmosphere in
violation of legal emissions standards.