Update . . .
Work (what I do for a living) has been crazy the past few weeks, so not much time (or energy) after hours to work on the boat.
This weekend, I should be able to get the remaining seats installed. The helm seats and the rear seat/sunpad each have some issues electrically or mechanically.
The helm seats (captain and side chair) use a Garelick 'EEZ-in' slide device to adjust the position of the seat. The side chair seat also swivels to face either forward, sideways, or backwards as desired.
Anyway, the slide mechanism is of a poor design/material choice, because it uses a spring loaded pin to lock the slide in position. The lever to release the pin is aluminum and subject to bending. After some usage, the lever has bent enough that it will no longer fully retract the pin, and the slide is stuck in a single position.
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View attachment 360421
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The slides are about $135 each (need 2 of them, one for each seat) and likely to fail again for the same reason. So, my poor man's fix was to use a cut-off wheel and take about 3mm (1/8") off the pin, which allowed the 'shortened' pin to fully retract and release the slide mechanism. A bit of a compromise, but there seems to be enough pin left to hold the slide in place.
The rear seat/sunpad has a linear actuator that raises/lowers the seat. The actuator currently runs only in one direction, the other direction is 'dead'. When I bought the boat, it was believed that the actuator had failed. But it does work in both directions when powering it directly. So, my attention has turned to the electrical portion. There is a switch at the helm and a set of relays down below. The switch tested out OK, so my attention is now focused on the relays, which appear to be like the automotive type that you find in a car's electrical box.
After much digging, I found the relays . . .
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View attachment 360422
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Hella (Hellish) 4RD-931-680-01 . . . I believe they are 40 amp . Anyway, I'm not sure how I could test them, but I ordered 2 more to replace these.
Now one would think that a relay may not be entirely necessary, given that a switch at the helm could probably do the same polarity reversing thing
If the relays fail (again) if may be re-wiring time . . .
So, the game plan for the weekend is to get all the remaining seats installed and then (hopefully) when the relays arrive I will have a working sunpad. We shall see . . .