Gtx Installation - Garmin GTX 335 w GPS Installation Guidance

4.5 GTX Installation

Install the GTX after completion of the continuity and power checks. The GTX should be installed into the
rack and secured correctly. The GTX backplate must be connected to the wiring harness and antenna
coaxial cables.
CAUTION
Do not to over-tighten the unit into the rack. Torque exceeding 8 in-lbs can damage the
locking mechanism.
NOTE
It may be necessary to insert the hex drive tool into the access hole and rotate the cam
mechanism 90 degrees counterclockwise to make sure the cam mechanism is in the correct
position before placing the unit into the rack.
1. Slide the GTX 3X5 straight in the rack until it stops, about one inch short of the final position.
2. Insert a 3/32-inch hex drive tool into the access hole at the bottom of the unit face.
3. Turn the hex tool clockwise while the left side of the bezel is pushed until the unit is firmly seated
in the rack.
4. Make sure nothing obstructs the unit from fully seating in the rack. The mounting rack may need
to be moved aft (toward the pilot) so that the aircraft panel does not obstruct the unit from
engaging in the rack. Torque to 8 in-lbs.
5. Refer to section 6 and section 7 for system configuration, calibration and checkout.
190-00734-17
Rev. 1
GTX 335 w/GPS Installation Guidance
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