Tweco PAK 200i - Manual (Page 69)

PAK 200i
Manual 0-5335 TORCH INFORMATION 7-1
SECTION 7: TORCH MAINTENANCE
7.01 Introduction
This section describes basic maintenance procedures performable by operating personnel. No other adjustments
or repairs are to be attempted by other than properly personnel.
!
WARNING
Disconnect primary power at the source before disassembling the torch or torch leads.
Frequently review the "7.08 Torch And Leads Troubleshooting" on page 7-10. Be sure the operator is equipped
with proper gloves, clothing, eye and ear protection. Make sure no part of the operator’s body comes into contact
with the workpiece while the torch is activated.
Sparks from the cutting process can cause damage to coated, painted, and other surfaces such as glass, plastic and
metal.
Handle torch leads with care and protect them from damage.
7.02 General Torch Maintenance
A. Cleaning Torch
Even if precautions are taken to use only clean air with a torch, eventually the inside of the torch becomes coated
with residue. This buildup can affect the pilot arc initiation and the overall cut quality of the torch.
WARNING
Disconnect primary power to the system before disassembling the torch or torch leads.
DO NOT
touch any internal torch parts while the AC indicator light on the front panel of the power supply is ON.
The inside of the torch should be cleaned with electrical contact cleaner using a cotton swab or soft wet rag.
In severe cases, the torch can be removed from the leads and cleaned more thoroughly by pouring electrical
contact cleaner into the torch and blowing it through with compressed air.
CAUTION
Dry the torch thoroughly before reinstalling.
B. Checking Center Insulator
The center insulator separates the negative and positive sections of the torch. If the center insulator does not
provide adequate resistance, current which is intended for the pilot arc may be dissipated into the Torch Head,
resulting in torch failure.
WARNING
Disconnect primary power to the system before disassembling the torch or torch leads.
DO NOT
touch any internal torch parts while the AC indicator light on the front panel of the power supply is ON.