Tweco Thermal Arc TA 500 - Manual (Page 35)

Manual No 0-0470 4-1 Service
SECTION 4: SERVICE
The Service Section is divided into nine parts:
4.1 Torch Maintenance
4.2 TAC 500 Power Supply Maintenance
4.3 HE 200 Coolant Recirculator Maintenance
4.4 Gas Pressure Regulators
4.5 Troubleshooting Guide
4.6 Returns
4.7 Primary Voltage Selection
4.8 Trouble-Shooting
4.9 Test Procedures
WARNING
Disconnect the primary power before disassem-
bling the torch.
4.1 Torch Maintenance
Disassembly
1. Unscrew the collar (19) and pull the end cap
(17) off. The end piece (16) and O-ring (15) will
remain in the end cap when it is removed.
2. Remove the coolant baffle (20) from the front of
the inner tip retainer (9).
3. Pull the outer insulator (13) off.
4. Unscrew the inner tip retainer (9). The cutting
tip will remain in the inner tip retainer. If addi-
tional leverage is needed to remove this part
insert a 5/32 inch diameter rod in one of the
large holes.
5. Remove the tip (6) from the inner tip retainer
by pressing back on the front of the tip. Con-
siderable pressure may be needed to push the
tip past the O-ring seals.
6. Remove the electrode (5) from the torch by un-
screwing it from the electrode seat (4). The elec-
trode seat does not need to be removed from
the torch unless it has been damaged.
7. Remove the water tube (2) by lifting it out of
the torch.
3
9
5
4
1
2
6
7
8
10
13
19
15
14
11
12
16
17
18
20
18
21
3
12
14
Figure 4-A M200 Torch