4700 Refrigerated Sampler Service Guide
Section 2 Sample Delivery System
2-28
Figure 2-35 Improperly positioned timing belt
2. Place the stepper motor on the chassis without tightening
the mounting screws, ensuring that the belt is around the
motor gear.
3. Place the cover plate on top of the shaft and reattach with
the three large
self-tapping
screws.
Figure 2-36 Installing the cover plate
4. While maintaining the belt tension by pressing the motor
away from the distributor shaft, slowly turn the large gear
until you feel the belt jerk as the teeth fall into alignment
(Figure 2-37).
Turn the large gear at least one full revolution to ensure
that all teeth have engaged between the pulley and the
belt. This eliminates the gaps shown in Figure 2-35.
5. Still pressing back on the motor, tighten the two motor
plate mounting screws.
Gaps
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Страница 124: ...4700 Refrigerated Sampler Service Guide Appendix A Electrical Diagrams A 2 ...
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