Blohm + Voss Oil Tools 9G-3570AIR, Technical Documentation Manual

Page: 16 / 71

OP
ER
AT
ION
16
Operation
1. With the doors open, swing the GrayChain into position on the drill pipe. Bring the 3570
to the correct height. Approximately
12
” above the tool joint, position the 3570 onto the
pipe making sure that you do not run the tool on the pipe upset or tool joint.
2. Close the doors, clamping the spinner onto the drill pipe. This is accomplished by
pushing the door valve handle in. The door valve is located on the bottom left of the
spinner.
3. Activate the rotation of the drilling by pulling the throttle valve handle out. Rotation of
the drill pipe can be changed (spin in, spin out) by reversing the position of the Quick
Disconnects located at the motor.
4. Open the Spinner doors by pulling the door valve lever. The 3570 can now be safely
swung away from the pipe.
Changing Pipe Sizes
The GrayChain 3570 has a unique and easy method to set up the spinner for various drill
pipe sizes.
1. Shut off all air to the spinner and bleed off any residual pressure in the door cylinders.
This is accomplished be activating the door valve after the source air has been shut
completely off.
2. To change the pipe sizes simply release the Safety Pin below the chain case. Pull the
adjust roller shaft out of the top of the case.
3. Locate the roller and roller shaft in one of the five designated slots for the appropriate
drill pipe size.
4. Replace the Safety Pin on the lower shaft. Restore the air supply.
Figure 5