Coolant Flush And Filter Replacement - Lincoln Electric FineLine 170HD Operator's Manual

BK8053-000111 Rev D

6.3 Coolant Flush and Filter Replacement

Important: Never turn on the System when the coolant reservoir is empty.
Important: When handling coolant, wear nitrile gloves and safety glasses
Important: Only use approved coolant. Commercially available antifreeze
contains corrosion inhibitors that will damage the cooling system.
Important: When making brass fitting connections, use two opposing
wrenches and only tighten enough to make liquid seals. The fittings are
subject to damage if over tightened.
The torch coolant should be flushed out of the system every six months and
replaced with new coolant. Replace the coolant filter at the same time.
Remove primary power to the Power Supply.
Ensure the torch base and torch head (with consumables) are properly
installed.
Ensure the coolant supply (in and out) hoses are properly installed.
Remove the coolant reservoir cap.
Remove the right case side from the Power Supply.
Make sure the drain valve is in the
closed position and push back on
the release ring to remove the
plug. Install 3/8" OD tubing into
the valve and place the opposite
end into an appropriately sized
vessel (minimum 5 gallons) to
collect the system coolant. Turn
the valve to the open position to
allow the coolant to drain.
Note: Some older Systems may
not have a drain valve. For these
Systems, disconnect the pump
inlet hose from the top/front of the
pump. Be prepared for coolant to
escape and have a bucket or
other vessel ready to catch
escaping coolant. Leave the hose
inside the bucket when moving to
the next step.
Remove the coolant supply hose (coolant out) from the rear of the Power
Supply. Note that the coolant supply hose has right hand threads. Be prepared
for coolant to escape from the hose/fitting when breaking this connection.
Blow compressed air (100 psi maximum) into the coolant supply hose. This will
force the remaining coolant from the torch, torch leads, and supply hose into
the reservoir and out the drain valve or supply hose.
This information is subject to the controls of the Export Administration Regulations [EAR]. This information shall not be provided to
non-U.S. persons or transferred by any means to any location outside the United States contrary to the requirements of the EAR.
Page 93 of 132
FineLine 170HD Plasma System
Drain Valve Pump Inlet Hose