[1] – Park machine safely
[2] – Remove air cleaner assembly.
[3] –
Clean areas around injectors and top of injection pump and remove the fuel injector lines as an assembly.
[4] – Cover openings on injectors and the two delivery valves that do not have the test tool in them to keep dirt from entering system.
[5] –
Install the timing tool (A) and clear straw (B) on the number one delivery valve (closest to flywheel) of injection pump.
[6] – Place key is run position for 30 seconds to make sure transfer pump runs to fill injector pump with fuel. Place key in off position.
[7] –
→NOTE:
Highlight TDC and fuel injection timing marks with different color markers.
This mark eliminates confusion as to which mark is in the timing window.
Turn the flywheel while watching for the number 1 cylinder TDC mark (C).
[8] – Locate fuel injection timing marks near the TDC mark.
[9] – Highlight the 19° mark (D) with a different color highlight than the TDC mark.
[10] –
→NOTE:
In order for test to work, fuel shutoff solenoid must be energized. If engine is out of machine, or if for some other reason the fuel shutoff solenoid cannot be energized, remove the fuel shutoff solenoid.
Set the throttle lever to the fast idle position. Turn ignition switch to ON position and listen for fuel shutoff solenoid to click. Fuel shutoff solenoid must be on and stay on during test.
[11] – Slowly turn the flywheel counterclockwise (as viewed from the flywheel end) until the timing tool straw shows fuel movement.
[12] –
Turn the flywheel clockwise (back) until the No. 1 cylinder top dead center (TDC) mark (C), and pump timing marks (D) have gone past the flywheel cover timing window (E) by at least 50 mm (2 in.).
[13] – Snap the straw with your finger until the level of the fuel, or a bubble, is set part way up the straw. This level is the point to watch for fuel movement.
[14] –
→NOTE:
If there is no fuel movement, engine may be on exhaust stroke. Rotate flywheel 360° and repeat test.
Slowly turn the flywheel counterclockwise (as viewed from the flywheel end) until the fuel in the straw just starts to move. Stop rotating the flywheel the instant the fuel begins to move.
[15] – Check the injection pump timing marks on the flywheel. The 19° mark (D) on the flywheel must line up in the center of the timing window (E) ±1°.
Results
– If the timing is not within specifications, timing must be adjusted. Record the number of degrees, advanced or retarded, to use for a reference when adjusting timing.
– If the timing is correct, remove timing tool, install injector lines, install air cleaner assembly and hood.