Overview
This document is a walk though of the steps required to upgrade a Single Valve (SV) Air Drill to a Double Valve (DV). The main benefit of this upgrade is to reduce the duty cycle between when the drill unit is turned on and off. The SV air drill cycled on continuously throughout the drilling process. The DV air drill will cycle on and off during each hole to be drilled, reducing the strain on the air system.
Note: Implementing the DV air drill does require an additional open input on the relay board (2 total).
Before you begin
You will need the following tools:
- Adjustable wrench, or crescent wrench set
- Set of allen wrenches
Disassembling the SV air drill
Since the valve at the top end of the air drill is what we are looking to replace, some of the components will not be used when going to the new valve. The items with green checks will be re-used and those with red X’s will not be used. A few crescent (adjustable) and Allen wrenches should allow you to disassemble the SV air drill.
Once the air drill has been disassembled to this point, stop. There are a few holes that will be needed in the back plate so that the new valve can be mounted.
Drilling new holes in the back plate
Ensure that the layout for hole measurements are made on the front side of the back plate (the side with the cylinder). Only (3) 0.1875” (5mm) holes are needed to mount the new valve. This is best done on a drill press.
Installing the Double Valve
At the top of the cylinder is a 90° elbow. Thread the ¼” flow control valve into the elbow securely.
Note: The hex area of the flow control is used to tighten while the black plastic area will spin allowing for
mounting in tight quarters.
Assemble the incoming air supply by using (top to bottom) ¼” disconnect, ½” washer, mounting bracket, ½” washer, sliding valve, 90° elbow and 3/8” push-in connector.
Note: Use Teflon tape or pipe dope for threaded attachment points.
On the back side of the double valve there are two mounting tabs that slide out. Slide these out before position it on the cylinder side of the air drill. The incoming air supply assembly will be mounted on the back side of the drill.
Using the M4 socket head screws, washers, and nylock nuts, mount the double valve and air supply to the plate. The upper right mounting position on the dual valve will mount directly to the plate. The lower left mounting position will share the socket head screw with the bracket of the air supply. Ensure that all three mounting screws are secured tightly.
Hooking Up the Hoses
Use the ¼” tubing to connect to the ¼” push-in connectors.
Note: If the tube needs to be removed after insertion, depress and hold the outer ring of the push-in connector, this will allow the tube to be pulled out (photo: below left).
Using the length of ½” tubing that came with the upgrade kit; connect the drill and the lower left push-in connector of the dual valve (photo: above and center). Then using the length of ½” tubing that was originally removed from the SV air drill, connect the upper push-in of the dual valve to the 1/2” push-in of the air supply (photo: above right)
This is the end of the SV to DV air drill retro upgrade. The brown cable that was used to control the single valve solenoid is no longer needed and can be removed from the control box.
The cables that came with the upgrade kit need to be installed as instructed in the (SBG00378) PRSalpha air drill DV document.
Uploading ....
