4-26 SHB 803 en – Edition 2.4 * 803s410.fm
Engine
☞Then slowly turn back approximately two more rotations until about 30° before top dead
center.
☞Remove any bubbles at the opening of the injection pump with your finger so that the
opening of the injection pump is about half full with fuel.
☞Slowly keep turning the crankshaft clockwise until the fuel level rises to the opening of
injection pump A.
☞Stop the rotary motion immediately.
☞Read the degrees before top dead center by means of the indentation on the flywheel.
➥Rated value: 16° +/− 1° before top dead center – see Marks on flywheel on page 4-25.
☞Measure the injection time two to three times.
➥If the specified value is reached, the injection time is correct.
☞Install the fuel injection lines, cutoff solenoid and cap back on again.
☞Check the fuel system for leaks.
➥If the value varies from the specified value, the injection time must be adjusted.
Bend the injection lines as you install them so they are not subject to tension once
they are installed. Bleed the injection lines once they are installed.
Setting injection time
• Variations of the injection time outside the tolerance range can be corrected by turning
the fuel injection pump.
➥The injection time must be measured to determine whether it is premature or too late,
see Fig. 34
☞Mark the original position of the injection pump on the pump and gear casing. – see Fig. 35
☞Remove all injection lines on the fuel injection pump and loosen the 4 flange screws by
about ½ a revolution (do not unscrew completely).
☞Swivel the pump in the required direction and retighten the screws.
➥Rotated away from the engine: earlier injection time.
➥Rotated toward the engine: later injection time.
☞Bend each of the injection lines before you install them so they are not subject to
tension once they are installed.
☞Check the injection time again – see Checking injection time on page 4-24.
Bend the injection lines as you install them so they are not subject to tension once
they are installed. Bleed the injection lines once they are installed.
Fig. 33: Measuring equipment
Fig. 34: Marks on flywheel
Fig. 35: Mark on pump housing
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