Where is the capacitor on my Lennox G* furnace?

I believe the capacitor is failing on my furnace. Why you ask. Sometimes the blower/fan motor will start and run fine, but lately when it turns on it will just sit there and hum until it gets hot and trips the breaker. I f I bump it or turn the pulley while it is humming it will start to spin and run strong. It is a fairly new motor. I cannot locate the capacitor, it is a Dayton motor model# 6K778B. Furnace is a Lennox G8. Any help would be greatly appreciated. Thanks!