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  #1  
Old 05-14-2018, 12:02 PM
David Carter David Carter is offline
 
Join Date: Mar 2018
Location: Alpharetta, GA
Posts: 11
Default How difficult to swap out TruTrack AP servos for Garmin?

Recently purchased my 7A with the TruTrack Vizion 385 installed. I'm in the process of adding 2 Garmin G5's and a GMU 11 magnetometer. (Plane has no AI or DG today.)

As I'm getting into the details of connecting the G5's, I have found that the existing GPSMAP 496 can feed track data to both the G5 & the TruTrack, but the G5 & the TruTrack can't talk to each other.

In a year or two, I plan to move to a G3x Touch all-Garmin solution, and am wondering if I should go ahead & swap out the AP now.

Pros:
- integration between G5 & AP
- more intuitive AP control panel
- build the wiring harness once, not twice. CAN bus from G5<->GSA28<->GMU11

Cons:
- more $ now, but will spend eventually anyway
- panel work to replace the TruTrack with the Garmin AP control head
- unknown difficulty in retrofitting the AP servos

Anyone gone through this process before?

Thanks!
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David
RV-7A - Slider - N87BP (bought flying in 2018)
2018 Dues Paid
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  #2  
Old 05-15-2018, 08:59 AM
rvsxer rvsxer is offline
 
Join Date: May 2007
Location: Inver Grove Hgts, MN
Posts: 294
Default

David,
You are going to need to run new harnesses to the servos as the wiring is completely different. The servo mounts will work fine, and so should the pushrods. The servo mounts will probably have to be modified slightly to clear a couple parts of the Garmin servos but a pencil grinder will take care of that. I swapped TruTrak for Garmin and that's what I did. As far as the panel work, you are going to install a new EFIS system so providing a place for a Garmin GMC-307 or -507 will be easy.
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Mike Hilger
RV-6 N207AM w/G3X, 1,600 hours +
South St. Paul, MN (KSGS)
Manager - Panel Design, SteinAir, Inc.
A&P, EAA Tech Counselor

We're all here because we're not all there...
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  #3  
Old 05-17-2018, 08:13 AM
David Carter David Carter is offline
 
Join Date: Mar 2018
Location: Alpharetta, GA
Posts: 11
Default

Mike - thanks for the info, very helpful.

Sounds like the servos should be no problem.

I will need to figure out a place to mount the GMC 507 control head on the existing panel; not planning to do the full panel re-do with G3X for a year or more.
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David
RV-7A - Slider - N87BP (bought flying in 2018)
2018 Dues Paid
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  #4  
Old 05-17-2018, 10:31 AM
rvsxer rvsxer is offline
 
Join Date: May 2007
Location: Inver Grove Hgts, MN
Posts: 294
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David,

The GMC-307 and 507 share a common footprint, and they have locking lugs that cam into place and tighten against the back of the panel, so no platenuts are required. You can see how they mount in the G3X / G3X Touch Installation Manual, Rev AE, here:
https://support.garmin.com/support/m...o=010-00G3X-00
Look on page 14-3.
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Mike Hilger
RV-6 N207AM w/G3X, 1,600 hours +
South St. Paul, MN (KSGS)
Manager - Panel Design, SteinAir, Inc.
A&P, EAA Tech Counselor

We're all here because we're not all there...
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