VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

  #1  
Old 05-27-2020, 08:02 PM
philb philb is offline
 
Join Date: Apr 2005
Location: Salt Lake City
Posts: 176
Default Servo repairs?

Has anyone had experience repairing Trutrak servos?

Had a DSB-C roll servo go out. Completely stopped providing torque sufficient to move controls, not shear screw. Makes anemic stepping sound

Trutrak agreed sounded like servo, suggested sending to mid-continent for repair. Cost new is bout $800. I?ll call mid-continent, but if expensive and will take time to do, maybe worth buying new?

Phil
Salt Lake City (KBTF)
RV-10
Reply With Quote
  #2  
Old 05-27-2020, 09:44 PM
D Weisgerber's Avatar
D Weisgerber D Weisgerber is offline
 
Join Date: Sep 2019
Location: Ionia Michigan
Posts: 192
Default

One of the wires on the 9 pin connector controls the torque to the servo, if that wire is broken you will get the stepping sound but it won't move.
__________________
RV6 N7219d
IO-320-B1A
Sam James cowl
first flight May 2, 1997
RV8 #83830 tail done, wing done, fuselage done.
Waiting for the finish kit.
Reply With Quote
  #3  
Old 05-27-2020, 09:53 PM
D Weisgerber's Avatar
D Weisgerber D Weisgerber is offline
 
Join Date: Sep 2019
Location: Ionia Michigan
Posts: 192
Default

I just looked at the wiring diagram, pin #16 on the 25 pin connector goes to pin #6 on the 9 pin connector on the roll servo. I would check the continuity between those pins before I had the servo rebuilt.
__________________
RV6 N7219d
IO-320-B1A
Sam James cowl
first flight May 2, 1997
RV8 #83830 tail done, wing done, fuselage done.
Waiting for the finish kit.
Reply With Quote
  #4  
Old 05-27-2020, 11:06 PM
philb philb is offline
 
Join Date: Apr 2005
Location: Salt Lake City
Posts: 176
Default

Man, if that works, you're due about $800 of your favorite beverage, and maybe it teaches the Bendix techs a thing or two!

It totally acts like a torque issue, - loose wire would be a great explanation for the sudden onset.

Thanks - Update tomorrow!

Phil
Reply With Quote
  #5  
Old 05-31-2020, 09:33 PM
Bill.Peyton's Avatar
Bill.Peyton Bill.Peyton is offline
 
Join Date: Sep 2009
Location: St. Louis, MO
Posts: 1,816
Default

I have both a pitch and roll servo that I am removing from my -10 this week that I plan on selling if you need an alternative
__________________
Bill Peyton
RV-10 - 1125 hrs
N37CP
First Flight Oct 2012
Aviation Partners, LLC
Reply With Quote
  #6  
Old 05-31-2020, 10:47 PM
philb philb is offline
 
Join Date: Apr 2005
Location: Salt Lake City
Posts: 176
Default

Thanks, Bill,

Might be in the market- continuity on torque wire is good, and 5 v when autopilot on. The control arm just freely pivots. Going to give mid-continent a ring. Trutrak used to refurbish for less than half the new price, but have no idea what to expect now that they outsource.... let me know when you decide to sell.

Best,

Phil
Reply With Quote
  #7  
Old 06-01-2020, 08:10 AM
Bill.Peyton's Avatar
Bill.Peyton Bill.Peyton is offline
 
Join Date: Sep 2009
Location: St. Louis, MO
Posts: 1,816
Default

I would like to sell both of the servos and the auto-trim module. The A/P controller has an issue, which is why I am replacing the entire system. They no longer support the GXpilot system. I already had a GMC307 Garmin control head, so all I needed was the two Garmin servos to convert to all Garmin system. I removed the entire system yesterday and have the servos available today. Give me a call if you need them. 314 six-O-five 7744.
__________________
Bill Peyton
RV-10 - 1125 hrs
N37CP
First Flight Oct 2012
Aviation Partners, LLC
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 06:54 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.