Garmin G3X Installation Manual page 114

8.2.5 Pressure (Fuel, Manifold, Oil, and Coolant)
General Installation Guidance – The specified pressure transducers provide for two different mounting
options:
Figure 8-11. UMA Pressure Sensor
A. Sensor body secured to the engine mount or firewall via an appropriately sized Adel clamp
(preferred)
OR
B. Mounted to a transducer mounting block located on the firewall. UMA sensor mounting may
require the use of a stainless steel AN911 fitting (union).
To minimize the possibility of cracking or breaking of the transducer due to vibration, the
sensor should not be mounted directly to the engine. Mechanical failure of the transducer
could result in loss of engine pressure for the sensed parameter (oil, fuel, manifold,
coolant).
Once a suitable sensor mounting arrangement has been identified, the following installation
procedures should be followed:
1. Mount the sensor using one of the two methods noted above.
2. Refer to the applicable engine manual to identify the appropriate connecting port on the engine
for the parameter being sensed. Once identified, use appropriate aircraft-grade hoses and fittings
to connect the corresponding port on the engine to the sensor. The male threads on Kavlico
sensors are designed to mate with a 1/8" NPT female thread. The female threads on UMA
sensors are designed to mate with a 1/8" NPT male thread.
The fuel and oil pressure fittings on the engine port should have a restrictor hole where
appropriate to minimize potential fluid loss in the event of breakage.
3. Connect the supplied connector to the appropriate inputs of the GSU 73 as referenced in the
Sensor Interface Drawings in Appendices H, I, and J. Secure the connector and wire assembly to
an appropriate location in the engine compartment to provide strain relief.
Page 8-10
Revision E
Figure 8-12. Kavlico Sensors (installed)
WARNING
NOTE
G3X Installation Manual – Engine Sensor Installation and Configuration
190-01115-01