Customer Questions and Answers for Timer by Whirlpool

Alfred, Yes, you need to partially extract the "green" colored retainer pin. You'll need to use a small flat blade screwdriver, On the back of the timer you'll insert the end of the screwdriver into the "D" shaped opening and pry out on the "green" colored shaft. You'll need to withdraw it appeoximately 3/8 to 1/2 inch. Install the knob on the front timer shaft, then press the green retainer back into it's original position.