VACUUM MASTER SHOCK FILLING TOOL | |
1 - Rebuild the shock dry (without oil). Tip - You can start with a normal rebuild with oil already in the shock to save time refilling the tank over the long haul. Mount the shock in a vise (no spring) with the Bleed Port facing up. Select the appropriate Adapter. Insert the Adapter into the. The Fill Valve will remain open throughout the filling process.  Adapter and Fill Hose Valve installed Fill Valve Open | |
| 2 - Put the Bladder on the Cap and pressurize it just enough so the bladder is full (2-3 psi)(not collapsed). Insert the bladder assembly into the Reservoir. Install the Clip and seat the Cap on the Clip |
| 3 - Draw a vacuum in the shock. Turn on the Vacuum Pump. Open the Vacuum Valve on the top of the tank. The shock will compress as the air is vacuumed out. Let it continue to draw down for about 15 seconds. Turn off the pump and close the Vacuum Valve on the tank.  Shock Collapsed Under Vacuum |
| 4 - Fill the shock with oil. Open the Pressure Valve (50 psi) to fill the shock with oil. Do not worry about the “air” in the fill hose as these bubbles are actually vacuum pockets, not “air”. The shock will extend as it fills. Twist the shaft if you need to help it along. After the shock is fully extended, stroke the shock a few times.
Shock Extended Under Pressure |
| 5 - Depressurize the Oil Tank. Close the Pressure Valve. Then slowly open the Vacuum Valve. This will release pressure through the pump. If you open it too quickly or you are using too much positive pressure it will blow oil back out of the pump vent. Repeat - If you would like you can repeat the procedure but it is usually not nesessary. |
| 6 - Because the bladder is pressurized to 2-3 psi it is in it's "full" state. Therefore it is really easy. With the shock shaft fully extended, remove the Adapter, close the Bleed Port and pressurize the shock with nitrogen. |
