PULL OUT OSCILLATOR - Turn the chassis over and pull the Oscillator straight out from the bottom of the Outer Housing. The Oscillator is clamped onto an inner Oscillator Sleeve so you may have to pry it off gently with a screwdriver. The 4 Sliding Seals are loosely attached to this Oscillator and may fall out when it is removed. Keep track of them and see how they are positioned before they fall off.
REATTACH SWIVEL HOUSING - With the Swivel inserted in the Swivel Housing, place the Swivel Housing on top of the Chassis. The four tabs on the bottom of the Housing should be over the four slots in the Chassis and the Clutch Clip should be over the Clutch Assembly Wheel. Press down on the Swivel Housing until it clicks. Check that all 4 tabs are engaged.