Reassembling Traditional Rotary Valves
2. Install rotor into housing- long spindle first.
3. Gently push the rotor into the housing with your thumb on the short spindle while spinning
the rotor with your other hand on the long spindle which is protruding from the other side of
the casing. 4. Spin the rotor until it moves effortlessly. If it feels sluggish, you may want to try a thinner rotor oil. Apply more oil if necessary.
5. Gently place the back bearing plate onto the short spindle on the open end of the rotor casing.
IMPORTANT: align the notch on the edge of the bearing plate with the notch in the rim of the
rotor housing on the threaded end. Press the plate on lightly with your thumb.
6. Screw on the rotor cap until it comes into contact with the bearing plate. Tap lightly 2 times on
the center of the rotor cap. Screw on the rotor cap a little further until it comes into contact
with the bearing plate. Again tap lightly 2 times on the center of the rotor cap. Repeat this
process until you are unable to screw the rotor cap on any further. This process installs the
back bearing plate into the housing without damage.
7. Once the bearing plate is installed, unscrew the cap and make sure your notches in the
housing and the bearing plate are aligned. If not, you will need to remove the rotor and repeat
8. Reinstall the rotor cap and spin the rotor with your fingers. The rotor should move freely in
the casing. If not, loosen the rotor cap 1/8th of a turn and gently tap on the long spindle of the
rotor. This should relieve the pressure the back bearing plate and the rotor should spin freely.
9. Install the stop arm and screw.
10. Reinstall linkages and/or restring rotor.
11. Oil rotor and linkages.