Tri Tool 642SB Clamshell Air and Hydraulic - Manual (Page 20)

20
TRI TOOL INC.
92-0612 Rev. 131230
These Locking Screws are captured in their holes so that they will not come totally
free of the Clamshell.
Separate the Clamshell halves evenly by pulling straight apart.
DO NOT FORCE OPEN.
SECURE THE CLAMSHELL TO THE PIPE.
Clean the mating surfaces and the contact surface of the Mounting Pads and the
Jackscrews on each half of the Clamshell.
Wipe clean the mounting surface of the pipe.
Check to ensure that the Tool Blocks will clear the pipe when the Clamshell is
mounted.
Close the two halves of the Clamshell around the pipe, keeping the mating surfaces
clean.
Check that the Alignment Pins have seated the two halves properly.
Bolt the two halves of the Clamshell together using the Locking Screws in the
Housing and in the Headstock.
Tightening torque should be 50 to 60 ft-lbs. (68 to 81 N-m).
Loosen the Lock Blocks, rotate and refasten them to the Headstock.
Using the fully Adjustable Clamping Pads, clamp the Clamshell to the pipe as
follows:
Rough center and square the Clamshell by tightening the four Clamping Pads
independently.
Check the center and squareness by eye.
The Adjustable Pads tend to square the Clamshell to the pipe.
If additional precision in squaring is required, consult TRI TOOL Inc. about
alternate methods of squaring.
Fine center the Clamshell as you would a 4-jaw chuck.