Hypertherm HD4070 Rev.8 - Manual (Page 143)

OPERATION
1
HD4070 Instruction Manual 4-33
Hypertherm
027347 Tool
4070.37
1
2
3 5 4
Replace Torch Water Tube
Below are some problems and causes that you may find with a defective or improperly installed water tube.
Problem Cause
Short electrode life Water tube not screwed in tightly
Flow switch interlock shutting Water flow restricted because
down the system water tube is loose
Humming or rattling sound Water tube bent or loose
coming from the torch
Turn OFF all power to the HD4070 system.
Remove consumables from torch. See page 4-23
Do not overtighten parts! Only tighten until mating parts are seated.
WARNING
T he HD4070 power supply is designed to go into an idle mode if the retaining cap is removed.
However, DO NOT REMOVE CONSUMABLE PARTS WHILE IN THE IDLE MODE! Always disconnect
power to the power supply before removing torch consumable parts.
Remove water tube Install new water tube Replace consumables
see page- 4-15