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4.3
Sensor Lock nuts and wrench
FOBO TIRE 2 sensors and In-Car unit are tied to a FOBO account; sensors are
pre-installed with in-car unit from the factory. They are not re-usable or
transferable without the owner releasing them from his/her FOBO account.
This is a theft deterrent feature to discourage theft.
As an additional anti-theft feature, all FOBO TIRE 2 package comes with lock-
nuts and special wrench. FOBO Tire 2 system functionality is not affected if
you do not use the lock-nuts.
The lock nuts and wrench are made of custom engineering plastics that can
withstand road salts and common automotive chemicals (gasoline, engine oil,
car wash shampoo, etc.).
In order to use the lock nuts, you must first install the lock nut to the tire valve
(with the bump facing tire rim). Screw in the lock nut all the way down and
ensure that there is still a
minimum of 5 thread count
on the tire valve for the
sensor unit to be screwed on. If there is insufficient thread for the tire sensor, it
may lead to air leakage. A solution for this would be to change the tire valve to
one with a longer thread. Next, screw in the tire sensor unit until it is reasonably
tight. Then use your finger to unscrew the lock nut outwards (i.e. anti-
clockwise) until it pushes against the bottom of the sensor unit. Use the wrench
to tighten the lock nut. The resultant friction force will make it difficult to
remove the sensor unit without loosening the lock nut. For rubber valves, hold
the valve stem with one hand and tighten the lock nut with the wrench on
another hand. This is to avoid the rubber valve from twisting making it unable
to tighten the lock nut.
