Photo Z

Maintenance, Lubrication & Adjustments

Interior Adjustments (continued)

Carriage “Full Out” Alignment: When the carriage is deployed to the “Full Out” posi- tion, the front bar of the carriage should align parallel with the union bar of the housing. This alignment will help ensure that a fully deployed and elevated platform will properly align with the bus threshold. Properly main- taining this carriage alignment will also help provide optimal performance during the in/out movement of the carriage and platform.

Accurate inspection of the carriage align- ment can be done by measuring the distance behind each drive motor from the rear carriage bar to the rear housing (L3 and L4 in Photo Z). Comparing the two distances, increase the chain tension on the side of the longest distance, via the tension locknut, 1/2 turn for each 1mm difference. Cycle the ramp several times, observing the full out align- ment of the ramp with the bus threshold. Stopping once again at the fully deployed position re-measure the distance behind each drive motor from the rear carriage bar to the rear housing and adjust the chain tension ac- cordingly until the full out alignment from side to side is within ±1mm. Note: If the chain tension of one side is overly increased, it may result in a binding condition of the track roll- ers in the guide rail and lead to obstructions sensed by the control box.

Locknuts

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