Mathey Dearman CGM Cold Cutting System - Manual (Page 18)

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H. Safety Warning: Do not connect Hydraulic Hoses that are under pressure as it may result in serious injury.
I.
Connect and secure the Air or Hydraulic Hose Quick Disconnects to the CGM-1.
J. Safety Warning: Insure that the Air or Hydraulic Hose Quick Disconnects are attached properly and are secure as it
may cause serious injury.
NOTE: Air Filter/Lubrication Device must be placed in the center of the two (2) Air Hoses. Make sure the bowl of
the Lubricator Assembly is filled with Pneumatic Oil.
K. Start the Air or Hydraulic Power Supply per the manufacturer’s instructions.
Safety Warning: When Air or Hydraulic Power is applied the CGM-1, an operator should be within easy reach of
the CGM Controls and the Controls of the Air or Hydraulic Power Supply at all times.
L. Verify the source of Air or Hydraulic power minimum output pressure and flow rate of:
Model Pressure Rate
Air Machine 8 bar (120psi) 4000 l. /min / 142cfm
Hydraulic Machine 100 bar (1,420psi) 72 l. /min / 20gpm
Warning:
Air Model – Adjust air pressure at the Air Filter/Lubrication Device is set at 6 Bar (90psi) using the Pressure
Regulator Valve. Failure to do so will cause damage to the Blade and Drive Motors.
Hydraulic Model – Make sure the relief valve of the Hydraulic Power Supply is set at 110 bar (1,420psi). Failure to
do so will cause damage to the Blade and Drive Motors.
6.2 USING THE MACHINE IN THE CUTTING PROCESS.
The Machine Chassis has six (6) slots that are machined into the bottom of the Chassis to make up five (5)-wheel settings
to center the Cutting Blades on the pipe. Proper positioning of the Wheel Holders gives the machine the optimal stability,
tracking and cutting performance. The Drive Chain must be the right length for the diameter of pipe to be cut. Figure 2
of Section 3 shows the different wheel positions and chain lengths for most common diameters of pipe.
Note: Refer to the Trouble Shooting Chart in the back of this manual if the Blades are not rotating.
Note: Hydraulic Model only - If this is the first time the Hydraulic Power Supply is being run, let the hydraulic
fluid circulate through the CGM-1 for 15 – 20 minutes to make sure the air bubbles are removed from the
hydraulic fluid.
A. Turn the Air Valve of the Cutter Lubrication Device to the ON Position.
B. Adjust the Lubricator Nozzle as needed to provide a steady flow of coolant on the Blades.
Note: If there is no flow of coolant from the Lubricator Nozzle refer to the Trouble Shooting Chart in the back of this
manual.
C. With the Blade Lowering / Raising Crank, turn the Feed Screw counterclockwise until the Cutters are through the
thickness of the pipe at desired depth.
D. Remove the Blade Lowering / Raising Crank from the Feed Screw and with the Column Tensioning Wrench provided,
tighten the 4 Hex Head Cap Screws that hold Blade Transmission securely to the 4 columns.
E. Turn the Machine Directional Control to the FORWARD Position.
Note: Never attempt to cut the pipe by placing the Forward Control Knob in the REVERSE Position.
F. Slowly open the Forward Speed Regulator Valve until the desired forward speed is achieved.
G. Check the pipe to see if the desired cut and bevel depth and cut finish are being achieved.
H. Cutter Stoppage:
I. If a Cutter Block occurs, quickly turn the Machine Directional Control to the REVERSE Position and leave
it in that position until the Cutters start to rotate.
II. When the Cutters start rotating - move the Machine Directional Control to the STOP Position.
III. Close the Forward Speed Regulator Valve a small amount.
IV. Turn the Machine Directional Control to the FORWARD Position.
Note: The operator should observe the cut at all times and should insert the appropriate wedges as needed during the
final stages of the cut to maintain the cut opening to avoid Cutter Blade stoppage or breakage.
I. When the cut is finished, move the Machine Directional Control to the STOP Position.
J. Loosen the 4 Hex Head Cap Screws that hold the Blade Transmission securely to the 4 columns; using the Blade
Lowering / Raising Handle rotate the Feed Screw, until the Cutter Spindle is raised to its highest position.
K. Turn the Start / Stop Control to the OFF Position.
L. Turn the Air Valve of the Double Mist Lubrication System to the OFF Position.