Throttle Return Spring: Service and Repair

REPLACING RETURN SPRINGS OF 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 relax spring (3).
- Takeoff lever (1).

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





- Remove spring (1)





Note: Check spring washer (1)





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





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





- Remove bushing (1) and spring (2):





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

Throttle Valve Basic Adjustment:





- Disconnect air hose on throttle housing.
- Mount dial gage 00 2 510 with extension (3) and holder 00 2 500 on throttle housing.
- Place dial gage tip on edge of throttle valve with pre-load.





- Pull off anti tamper lock (1) and loosen screw (2) until lever (3) no longer rests on screw (2).
- Screw in screw (2) until throttle valve starts to move.





- Open throttle valve 0.2 mm (0.008") further 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 hesitate.
- Check adjustment of throttle switch.
- Check engine idle speed and CO level.