Note: You will need a tachometer to adjust the minimum RPM - see section 9 for alternative methods.
1. Start the engine, bring it to normal operating temperature, note the idle speed and turn off the engine.
2. Insert a washer or feeler gauge 1.0 mm thick between the feed lever and the minimum speed adjusting screw (see d/fig. 3.3).
3. Start the engine and leave it to idle. The engine speed should exceed the normal speed by 50 rpm.
4. If adjustment is necessary, loosen the locknut, turn the minimum speed adjusting screw in the desired direction and tighten the locknut again.
5. Pull out the dipstick and leave the engine to idle.
6. Move the fast idle lever all the way towards the flywheel and check that the engine speed has increased to 950±50 rpm. If necessary, loosen the lock nut, turn the stop to the desired direction = tighten the lock nut again.
7. With the engine running at idle, check the operation of the manual shut-off device by turning the shut-off lever. The engine should stop immediately.
Injection pump sprocket - removal
In early 1992 models, the injection pump sprocket bolt no longer includes a puller. In order to remove the sprocket from the cone of the injection pump shaft, it is necessary to bolt a suitable flange on it and only then unscrew the sprocket bolt.
2. A suitable flange can be made from an old injection pump sprocket (if available). Alternatively, the flange can be made from a steel plate.
3. Do not try to knock down the sprocket with a hammer or pry it with any lever, because. in doing so, you can damage the injection pump.