Jeff S Fairfield , CT January 07, 2017 Appliance: General Electric Wall Oven W/Microwave JKP90DP1BB Ge Oven Jkp90dp1bb: My microwave guide roller assembly for the turntable broke where it connects to the motor shaft. How to replace Guide Roller Assembly. Ordered a new replacement assembly from AppliancePartsPros.com. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes