Tweco 400 Ultra-Cut XT Plasma Cutting System - Manual (Page 110)

ULTRA-CUT 100 XT/200 XT/300 XT/400 XT
5-2 MAINTENANCE Manual 0-5297
5.03 Coolant Replacement Procedure
Replace coolant as follows:
1. Disconnect the system from main input power.
2. Remove the two right side panels.
3. Locate the coupling in the coolant line that comes from the bottom of the coolant tank, #1 in the following
illustration. Disconnect the coolant line at this fitting and drain the coolant into a disposable container of
sufficient size. Remember you will be draining more than the contents of the coolant reservoir.
4. Once coolant is draining, disconnect the gray hose coupling #2 in the illustration below. Allow excess coolant
to drain, then apply a maximum of 5psi to clear the lines.
CAUTION
Applying more than 5 psi air pressure to the cooling system will result in damage. Extra caution must
be used when performing this task.
2
1
Art # A11689
5. Reconnect those two fittings and then remove the filter bowl from the canister at the rear of the power sup-
ply. Pour this remaining coolant into the container and replace the filter bowl.
NOTE
If you also need to replace the coolant still in the leads, disconnect the leads from the power supply and
manually drain them.
6. Fill the tank with fresh coolant until the right level is reached checking for leaks.
7. Turn system on, let it run for a few minutes and check coolant level, refill as needed. Refer to Section 3:26
Complete Installation on the procedure for this.
8. Install the side panels.