Hypertherm HD4070 Rev.1 - Manual (Page 204)

HyPerformance HD4070 Instruction Manual 5-41
MAINTENANCE
THC routine maintenance
Every 3 months complete the following:
1. Check the THC lifter assembly and associated cables for wear and damage.
2. Check the inside of the control box and for dirt. Use compressed air to clean the units. If the work environment
is extremely dirty, clean the units more often.
3. Check the lifter assembly sealing band for tears and fraying.
4. Replace or repair damaged parts.
Note: Do not grease or lubricate any part of the X-Y lifter assembly.
X-Y lifter sealing band – replacement
The sealing band keeps foreign matter out of the lifter assembly. Replace the band if it is torn or worn by installing a
Band Seal Kit. The kit contains a new band, screws and retainers.
Caution: Turn off all power to the plasma system and THC before working on the THC lifter.
The THC system can be damaged if disconnected with power applied.
Sealing band – remove (figure 5-1)
1. Turn off all power to the plasma system and THC.
2. Remove the lifter from the cutting machine.
3. Remove the torch mounting block or breakaway mounting bracket from the lifter retaining block (view 1).
4. Remove the left side cover (view 1).
5. Remove the 2 retainers that secure the band to the retaining block (view 2).
6. Remove the band from the rear of the lifter (view 3).
WARNING
ELECTRIC SHOCK CAN KILL
Turn off all electrical power before removing the power supply cover. Press the
power supply OFF (0) pushbutton switch and set the line disconnect switch to OFF.
In the U.S., use a “lock-out and tag-out” procedure until the service or maintenance
is complete. In other countries, follow appropriate local or national safety
procedures.