1995 Caterpillar 312 A/C box replacement

I just bought a nice 1995 312 Cat excavator. SN: 6BL00906 It has 4600 hours and was well maintained by the original owner. The issue I have is the A/C box that is mounted to the floor behind the operators seat.

I vacuumed the interior of the box to clean it out and found linkage parts that control the louvers. None of the lovers work via the servo motors. I called Cat for the hell of it and it's $3100 for the box and $700 for the control panel. (upper half of the control panel isn't...

1995 Caterpillar 312 A/C box replacement