Note: Refer to Special Instruction, NEHS0605 for the operating instructions of the 9U-7400 Multitach Tool Group and the instructions for the test procedure.
- Operate the starting motor in order to crank the engine.
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| Illustration 1 | g00569479 |
Points of Adjustment on Governor (1) Set screw of governor (2) Control lever (3) Low idle set screw (4) Idler subspring (5) Bolt for stopping at full load (6) Stop lever | |
Note: For any adjustments, ensure that the coolant and oil temperature are above 70 °C (158 °F).
- At approximately 150 rpm, the engine will begin to start and the engine will pick up speed. Immediately after the engine is running, move the control lever (2) in order to hold the engine rpm between 800 and 1000 rpm.
- When the engine is running at a steady rpm, move the control lever (2) to the low idle position.
- Hold control lever (2) at the position needed for no load minimum rpm, and set low idle set screw (3) (if equipped). Low idle is 900 ± 20 rpm.
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| Illustration 2 | g00569487 |
Adjusting Low Idle (2) Control lever (3) Low idle set screw (if equipped) | |
- Turning the low idle set screw (3) clockwise raises the idle rpm.
- If the engine rpm tends to fluctuate, turn idler subspring (4) clockwise. Allow the idler subspring to come into slight contact with the tension lever. The engine rpm will rise slightly and the engine rpm will stop fluctuating when the idler subspring is exerting some force upon the tension lever.
Note: Tightening the idler subspring adjusting screw is likely to cause the engine to overspeed when the load is dumped during heavy-duty operation. Tighten the idler subspring slowly until the unstable condition is eliminated.
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| Illustration 3 | g00569488 |
Adjusting The Idler Subspring (4) Idler subspring | |