All,
I have a PW 3662 operating milk car that has an operational issue. When activated, I can hear the coil buzzing but the piston & plunger fail to actuate. It acts as if it's not getting enough power. The wiring from the sliding shoes to the coils are good, and I've verified the can and sweep arms move freely as well as the piston and also verified no jamming is occuring with the cans (yes, using the correct & original 3662-79 plastic cans w/ aluminum bottoms) as I can get the cans to eject as designed from the sweep arms by hand.
I suspect the issue is with the coil itself, even though the varnish & windings look okay. I've tried using various voltages all the way up to 18 with no luck. Any thoughts?