Tweco Pak 200 - Manual (Page 82)

TORCH MAINTENANCE 7-2 Manual 0-5057
PAK 200 TORCH MAINTENANCE
NOTE
DO NOT
use other lubricants or grease, they
may not be designed to operate within high
temperatures or may contain “unknown ele-
ments” that may react with the atmosphere.
This reaction can leave contaminants inside
the torch. Either of these conditions can lead
to inconsistent performance or poor parts life.
7.03 Common Operating Faults
The following lists the more common cutting faults and
what is the possible cause:
1. Insuffi cient Penetration
a. Cutting speed too fast
b. Torch tilted too much
c. Metal too thick
d. Worn torch parts
e. Cutting current too low
f. Non-Genuine Thermal Dynamics Parts
2. Main Arc Extinguishes
a. Cutting speed too slow
b. Torch standoff too high from workpiece
c. Cutting current too high
d. Work cable disconnected
e. Worn torch parts
f. Non-Genuine Thermal Dynamics Parts
3. Excessive Dross Formation
a. Cutting speed too slow
b. Torch standoff too high from workpiece
c. Worn torch parts
d. Improper cutting current
e. Non-Genuine Thermal Dynamics Parts
4. Short Torch Parts Life
a. Oil or moisture in air source
b. Exceeding system capability (material too thick)
c. Excessive pilot arc time
d. Air fl ow too low (incorrect pressure)
e. Improperly assembled torch
f. Output current too high
g. Torch tip contacting workpiece
h. Damaged or loose Torch Head components
i. Non-Genuine Thermal Dynamics Parts
5. Poor Pilot Starting
a. High coolant conductivity (Refer to "5.03 A r c
Starter Service" on page 5-3.)
b. Non-Genuine Thermal Dynamics Parts
7.04 Inspection and Replacement
Consumable Torch Parts
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.
Remove the consumable torch parts per the following
procedure (See NOTE):
NOTE
A multipurpose wrench is supplied for chang-
ing the tip, electrode and gas distributor in the
Torch Head.
Multi-Purpose Wrench
(Catalog Number 20-0001)
Used for Electrodes
Used for 11/16" ( 17.5 mm)
Across Tip Flats
Gas Distributor Notch
Used with 11/16" (17.5 mm)Tip
Used for 5/8" (15.9 mm)
Across Tip Flats
Gas Distributor Notch
Used with 5/8" (15.9 mm)Tip
This Side
Towards Torch
A-01639
Figure 7-1: Multi-Purpose Wrench
1. Unscrew and remove the shield cup from the torch.