I recently installed my #49 snow thrower on my John Deere 322 and the front PTO worked fine when testing it. I went to blow snow the other day and the PTO engaged briefly and then quit. I readjusted the air gaps to .018" and measured the coil resistance to 3.2 ohms and the voltage to the connector was 14.3 volts DC. When I flip the PTO switch I can hear a relay click, but it won't engage. I'm about ready to tear the PTO apart to find the problem, but am looking for any help or suggestions before I do so. Thank you.