To make the 45.181250MHz crystal oscillate at correct frequency I add a coil and a resistor (Fig below).
The coil will make the crystal to oscillate at its 3:e overton. You might have to adjust the value of the coil to set the frequency right.
I noticed that the ocillator will vary about 600Hz if the coil value changes from 550nH to 650nH.
To be sure that your Local oscillator works, attach a frequency-counter or a oscilloscop to pin 3 at MC13136 and adjust the coil. In my example I measured 44.181345MHz.
You can also controll the 10.245MHz oscillator at pin 6.