How to Adjust Accelerator Lever for Yanmar ViO45 ViO55 Excavator

Properly adjusting the accelerator lever is crucial for the smooth operation and optimal performance of Yanmar ViO45 and ViO55 excavators. This article will guide you through the step-by-step process of adjusting the accelerator lever to ensure the correct idle and high idle speeds.

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Procedures:

1) Adjustment of Idle Speed
(1) Adjust the length of the stopper bolt 1 to 1.06 in.(27 mm), as shown in the drawing. Loosen the stopper bolt 2 and keep it loosened.
(2) Move the accelerator lever forward to its stroke end (the minimum idling speed position).
(3) Adjust the accelerator cable 5 in the part A so that the regulator handle 3 on the engine side contacts with the adjusting bolt 4 for the minimum idling speed.
(4) Check if the minimum idling speed is 1125 to 1175 rpm. If not, make readjustment with the accelerator cable 5 in the part A or the adjusting bolt 4.

2) Adjustment of High Idle Speed
(1) Move the accelerator lever back to its stroke end until the regulator handle 3 on the engine side contacts with the adjusting bolt 6 for the maximum idling speed.
(2) While keeping this condition, tighten the stopper bolt 2 until it contacts with the lever link and then, tighten the lock nut 7.


Note :
• Check that the maximum idling speed is 2565 to 2615 rpm.
• The adjust screw 6 is set under seal so that the high idle speed cannot be readjusted.Yanmar Diagnostic Kit

More Yanmar machine repair case,please refer to Yanmar Trouble Repair