MK Products Prince XL MM Com ACWC - Manual (Page 9)

Prince ® XL Millermatic Compatible Gun Owner's Manual - Page 2
Coolant Connections
If so equipped; one end of the water hose is is pushed over a barbed fitting
and secured by twisting the hose retainer to the end of the hose. The hose
retainer is re-usable and can be removed and re-installed as needed. The
other end is connected to the center fitting on the power block.
The BLUE coolant supply hose pushes over a barbed fitting on the end of
the gun body. The opposite end of the BLUE hose pushes into a BLUE
threaded coolant fitting, which connects to the SUPPLY side of the coolant
recirculator. The RED coolant return hose pushes over the barbed fitting in
the Power Manifold. The opposite end of the RED hose pushes into a RED
threaded coolant fitting, which connects to the RETURN side of the coolant
recirculator.
Both threaded fittings on the end of the BLUE and RED hoses are standard
left-hand thread. MK Products compatible guns have interchangeable fittings,
so you can match as needed for your cooler. Both types of fittings require a
hose retainer.
Electric Cable
A multi-conductor control cable is used on the Prince XL Millermatic
Compatible gun. The gun end of the control cable is secured to the gun
with a boot clamp and plugged into the pot assembly and micro switch
connectors. Slack is left in the electric cable as it exits the back of the gun
to prevent cable breakage. The cabinet end has a ten-pin “W” clocked
amphenol connector.
Section B Operation
General Description
The 24 Volt DC gun motor is controlled by a 3-3/4 turn potentiometer
recessed in the pistol grip. The gun trigger is so designed that when it is
partially depressed, gas flow starts via the valve located in the gun body -
prior to ignition of the arc. When the trigger is partially released after welding
(extinguishing the arc), gas flow continues until the trigger is fully released.
Built-in pre and post gas flow.
Barrels
The Prince XL Millermatic Compatible comes standard with a straight
barrel assembly (for both air and water cooled models). An optional curved
barrel assembly is also available. In cases where these barrels need to
be extended or the tip threads have been damaged, a tip extender can be
adapted. The same tips and threads can be used, however a longer Teflon
liner is required.
Barrel Removal and Installation
To remove a barrel assembly, loosen the patented EZ Lock ® Taper lock nut
assembly. This will push barrel away from the body far enough so that it may
be pulled out of the body.
To replace a barrel assembly, push the barrel assembly into the gun body
until it clicks to a stop. To assure proper seating of the barrel, open the drive/
idler roll door in the top of the handle. The rear face of the barrel should now
be flush with the gun body. Take care not to damage the “O” rings when
431-1898
5/16” Hose Retainer
431-1910
Quick Connect Fitting
431-1893*
Nipple
753-3379*
Left-Hand Threaded Fitting
*Must be ordered together