ALLISTER Garage Door Openers 112045 Front Idler Pulley 100004 Old part number For Allstar, Allister, Pulsar and MVP garage door openers. Compatible with models ARD-II A, Access 200/250, Access 2000/2500, Access 3000/3500, PDQ, Allister Century Series 310/510/710 garage door openers. Replaces tooth style pulley. Chain runs around pulley. This part is located on the front of the rail assembly above the garage door. Older part number 100004