To change that retain you have to disassemble velocity box, clutch and motor steering wheel, mark the steering wheel position to place it the same, then it makes a small drilling in the old retain and thread a Parker screw the cul when making stop at the bottom of the accommodation will expel the old retain, lubricates the lips of the new retain and stick it carefully helping you with a probe to slide your lips without damaging them, then rearma. Reviewing clutch, thrust ruleman and rectifying the steering wheel, if you need to repair the clutch according to the review, tell us how you go, greetings.