Maintenance; General; Inspection And Cleaning; Torch Consumable Parts - ESAB B Series Installation, Operation And Maintenance Manual

SECTION 6

6.1 GENERAL

If this equipment does not operate properly, stop work
immediately and investigate the cause of the malfunction.
Maintenance work must be performed by an experienced
person, and electrical work by a trained electrician. Do
NOT permit untrained persons to inspect, clean, or repair
this equipment. Use only recommended replacement
parts.
WARNING
!
Be sure that the wall disconnect switch or wall circuit
breaker is open before attempting any inspection or
work inside of the Power Source, the junction box,
the flow control box or the PT-24 torch.

6.2 INSPECTION AND CLEANING

Frequent inspection and cleaning of the Precision
Plasmarc System is recommended for safety and proper
operation. Some suggestions for inspecting and cleaning
are as follows:
A. Check work cable to workpiece connection.
B. Check safety earth ground at workpiece and at power
source chassis.
C. Check heat shield on torch. It should be replaced if
damaged.
D. Check the torch electrode and cutting nozzle for wear
on a daily basis. Remove spatter, resharpen point, or
replace if necessary.
E. Make sure cable and hoses are not damaged or
kinked.
F. Make sure all plugs, fittings, and ground connections
are tight.
CAUTION
!
Water or oil occasionally accumulates in compressed
air lines. Be sure to direct the first blast of air away
from the equipment to avoid damage to the junction
box or flow control box.
G. With all input power disconnected, and with proper eye
and face protection on, blow out the inside of the power
source, the flow control, and the junction box using
low-pressure dry compressed air.

6.3 TORCH CONSUMABLE PARTS

WARNING
!
Make sure power switch on the Power Source is in OFF
position before working on the torch.
Spare parts kit P/N37609 is available for maintaining the
PT-24 torch. For contents and recommended uses, see
Figure 6-1 and Process Data Sheets.

6.4 GAS PRESSURE SWITCH

The pressure switches are factory set to provide precise
control of the cooling gas and plasma gas pressure. The
two switches are located in the junction box. The pressure
adjustment wheels on the pressure switches should not
be touched. Consult your ESAB representative if you
have determined that the pressure switches are not
functioning properly.
6.5 PT-24 TORCH DESCRIPTION
See Table 2-6 for overall size and general configuration.
A. Mounting. The torch can be mounted by the sleeve
or by the 1.812 inches (46 mm) dia machined surface
shown (see Figure 3-10). This insulated surface and
its shoulder are machined relative to the nozzle
retainer thread on the torch body and is held concen-
tric to the cutting nozzle within a total indicator reading
of 0.010 inches (0.25 mm) or the nozzle bore is within
0.005 inches of any point on the 1.812 dia. When
mounting be sure not to cover the small vent hole in
the side of the sleeve. This hole prevents coolant from
building inside the sleeve should a leak occur in a
service line.
B. Service Lines. Both the 4.5 and 17 ft (1.4 m and
5.2 m) long lines are shielded and connect to the
junction box by a friction fit grounded connection.
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MAINTENANCE