Does the camshaft drive the fuel pump?
Specific designs vary, but in the most common configuration, these pumps are mounted on the side of the injection pump and driven by the camshaft, either directly or via a pushrod. Both pumps create negative pressure to draw the fuel through the lines.
How do you check the fuel pump timing on a main engine?
Hair line Test is a method of checking fuel pump timing by looking for the crank angle when the marking on plunger and its body coincides. When the unit is at TDC with both markings on plunger and its body coincide; the crank angle marking on flywheel will tell the exact position of fuel injection on timing diagram.
How do you test a fuel pump lead?
Insert dial gauge into the support and set it to zero. Slowly turn the engine flywheel in the running direction. Dial start to move as soon as follower starts rising (rise of cam starts). Keep turning the engine until the TDC mark (ignition DC) for cylinder unit no.
Can a fuel pump change fuel pump timing?
For adjustable cam type engines timing can be altered by individual cams of the fuel pumps. For solid camshaft type, it is only required for checking on No. 1 unit.
Where does the fuel pump mount to the timing case cover?
Where the fuel pump mounts to the timing case cover a gasket provides a tight seal. Although this gasket is usually reliable, engine vibration can cause the bolts to come loose. When this happens, oil can seep out around the fuel pump. If you notice a leak in this area, replace the seal as soon as possible,…
How do you remove the fuel injection pump?
If you didn’t time the engine before removing the injection pump remove the timing cover marked “Timed Start Inj.” or “Timed End Inj.” Roll the injection pump into time by lining up the timing marks (see figure 1 or figure 2 above). Roll the engine into time, in the normal direction of rotation, by lining up the timing marks.
What causes a fuel pump to come loose?
In the example of a small block Chevy V-8, for every engine revolution, the fuel pump actuator is pushed and released one time. Where the fuel pump mounts to the timing case cover a gasket provides a tight seal. Although this gasket is usually reliable, engine vibration can cause the bolts to come loose.