Upper Arm Pillow Ball Bushing Rotation Starting Torque Check

UPPER ARM PILLOW BALL BUSHING ROTATION TORQUE CHECK

Required Special Tool:

- MB990326: Preload socket





1. Insert the bolt to the upper arm pillow ball bushing, and install the nut with the washer from the opposite side. Rotate the inner cylinder (including washer) for several turns, and measure the rotation starting torque of the upper arm pillow ball bushing using the special tool MB990326.
Standard value: 1.5Nm (13.2 in-lb) or less
2. When the measured value exceeds the standard range, replace the upper arm assembly.
3. Even if the measured value is within the standard value, check that the upper arm pillow ball bushing has no looseness or gritty feeling. If there is no looseness or gritty feeling, it is judged as usable.