Mounting Instructions - Garmin G3X Installation Manual

13.4.3 Mounting Instructions

After evaluation of the mounting location has been completed and ensuring that requirements are met,
assemble the GMU 22 mounting plate kits according to the dimensions given in
unit assemblies.
Mount the GMU 22 to its mounting plate, taking care to tighten the mounting screws firmly. Use of non-
magnetic tools (e.g. beryllium copper or titanium) is recommended when installing or servicing the
GMU 22. Do not use a screwdriver that contains a magnet when installing or servicing the GMU 22.
The metal components in the GMU 22 connector may slightly affect the magnetic field sensed by the
GMU 22. Place the connector at least 2 inches from the body of the GMU 22 to minimize this effect.
After attaching the GMU 22's connector to its mate in the aircraft wiring, secure the connector in place
using good installation practices. This will ensure that any remaining magnetic effect can be compensated
for using Calibration Procedure D: Magnetometer Calibration
Section 31.4.3.5 for GDU 45X/46X systems).
See Figure 13-2 for minimum recommended clearance for bend radius of the GMU 22 cable.
NOTE
If the GMU 22 is ever removed, the anti-rotation properties of the mounting screws must
be restored. This may be done by replacing the screws with new Garmin part number
211-60037-08. If original screws must be re-used, coat screw threads with Loctite 242
(blue) thread-locking compound, Garmin part number 291-00023-02, or equivalent.
Important: Mounting screws must be brass.
1.57 40
Figure 13-2 GMU 22 Minimum Recommended Clearance
190-01115-01
Rev. AA
(Section 31.4.3.5
MINIMUM RECOMMENDED CLEARANCE
FOR MINIMUM BEND RADIUS OF THE
GMU 22 CABLE IS 1.57[40] FROM THE
GMU 22 SURFACE
G3X/G3X Touch Installation Manual - GMU 22 Installation
Figure 13-3. Install the
for GDU 37X systems and
Page 13-5