Hypertherm XPR170, Instruction Manual

Page: 257 / 438

Maintenance
7
XPR300 Instruction Manual 809480 257
f. Leave the coolant return hose (red band) disconnected from the rear of the plasma power
supply.
g. Put a container under the pump plug.
h. Remove the plug and coolant pump screen and set them aside.
i. Remove the coolant supply hose (green band) from the rear of the
plasma power supply.
j. Attach compressed air (no more than 3.45 bar/50 psi) to the coolant
supply hose fitting on the rear of the plasma power supply where the
coolant supply hose (green band) was previously connected.
k. For no more than 30 seconds, use the compressed air to blow all of
the coolant into the container.
l. Leave the coolant supply hose (green band) disconnected.

System components need the coolant to lubricate rotating surfaces. If
air flows through the cutting system for longer than 30 seconds, it can
eliminate the coolant necessary for lubrication.
5. Clean and, if needed, replace the coolant pump screen:
a. Clean the coolant pump screen. Rinse it with water if you find debris.
b. Examine the coolant pump screen.
c. If you find damage on the coolant pump screen, replace it (127559).
d. Install the coolant pump screen.
e. Wipe the O-ring on the plug. Make sure that the O-ring is free of
debris, cracks, and nicks.
f. Install the plug on the coolant pump housing.