Upgrade Kit Owner manual

8 Upgrading the DP-3000
Changing Gears
You can modify the DP-3000 flow rate by interchanging the gear sizes within a given gear box for your
motor. Gear ratio adjustment allows you to change the speed of the lead screw to optimize the flow rate
for your application. There are three possible gear ratio combinations available:
24/56 56/24 40/40
These figures indicate the number of teeth on each gear. These configurations may be used with any
motor type to modify the speed range. Either the motor gear or the feed screw gear may be size 24, 40 or
56 to form one of the combinations above. The gear size directly affects the rate of linear travel of the
lead screw, which controls the piston speed when dispensing (forward movement) and refilling (reverse).
A smaller motor gear will cause the lead screw and piston to move more slowly, resulting in a lower flow
rate. A larger motor gear will have the opposite effect.
CAUTION! Removal of the pump is not required. However, if the pump is not completely
removed, the dispensing system should be turned OFF to avoid injury.
Only a trained service technician should change the gear box.
Tools Needed
• 2.5-mm hex key
• 1/16-inch hex key
To change the gears:
Refer to Figure 2-6 and Figure 2-7 to locate parts.
1. If a fluid reservoir is installed, disconnect it from the pneumatic line.
2. Remove the fluid reservoir from the DP-3000 by disconnecting the Luer elbow from the
stopcock and unclipping it.
! You may want to remove the receiver head from the fluid reservoir first.
3. If desired, remove the DP-3000 from the dispensing system.
4. Using the 2.5-mm hex key, remove the three screws from the gear cover.
5. Remove the gear cover. See Figure 2-6.
! The gears will now be exposed.
6. Using the 1/16-inch hex key, loosen the set screws on the gears. See Figure 2-7.
7. Gently but firmly, lift the gears off of the shafts to remove them.
8. Place the replacement gears on the respective shafts.
9. Align the set screw hole on the feed screw gear with the long flat on the feed screw shaft, and
use the 1/16-inch hex key to tighten it.
! It is easiest to place the set screw onto the end of the hex key, then place the end of the
hex key into the hole on the feed screw gear.
10. Align the set screw hole on the motor gear with the flat of the motor shaft.
! Do not yet tighten the set screw.