Throttle Return Spring: Service and Repair

REPLACING RETURN SPRINGS FOR THROTTLE SHAFT





- Disconnect cables (1...3)
1 = Automatic transmission
2 = Accelerator pedal
3 = Cruise control

Installation Note:

- Adjust cables.





- Remove retainer (1).
- Remove washer (2).
- Disconnect linkage (3) on lever (4).





- Lift and turn lever (1) to remove tension on spring (3).
- Remove lever (1).

Installation Note:

- Check bearing sleeves (2), replacing if necessary.





- Take off Spring (1).

Important!




- Note spring washer (1).





- Disconnect spring (1).
- Unscrew nut (2).





- Take off washer (1) and lever (2).





- Remove sleeve (1) and spring (2).





- Check corrugated washer (1) and plain washer (2).

Basic Adjustment of Throttle Valve:





- Disconnect air hose on throttle housing.
- Mount dial gage 00 2 510 with extension (3) and solder 00 2 500 on the throttle housing.
- Dial gage point must be positioned on edge of the throttle valve with preload.





- Pull off anti-tamper lock (1) and loosen screw (2) until lever (3) no longer rests on screw (2).
- Tighten screw (2) again until the throttle valve begins to move.





- Open throttle valve to gap of 0.2 mm (0.008") with screw (1).
- Lock screw with clear lacquer.
- Install anti-tamper lock (2).
- Open and close throttle valve several times after finishing adjustment - throttle valve must not seize.
- Check adjustment of the throttle switch.
- Check engine idle speed and CO level.