29
5.1 General
If this equipment does not operate properly, stop work
immediately and investigate the cause of the malfunc-
tion. 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.
Be sure that the wall disconnect switch or wall circuit
breaker is open before attempting any inspection or
work inside of the prest-o-lite
®
550.
5.2 InspecTIon anD cleanInG
Frequent inspection and cleaning of the Prest-O-Lite
®
550 is
recommended for safety and proper operation. Some sug-
gestions 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 or replace if necessary.
E.
Make sure cable and hoses are not damaged or
kinked.
F.
Make sure all fittings and ground connections are
tight.
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 prest-o-lite
®
550.
PISTON PLUG
PISTON
SPRING
FLOW SWITCH
G.
With all input power disconnected, and wearing
proper eye and face protection, blow out the inside
of the Prest-O-Lite
®
550 using low-pressure dry
compressed air.
5.3 floW sWITcH (fIGure 5-1)
When excessive contamination is found in the air, the
flow switch (FS) should be removed, disassembled and
cleaned as follows:
A.
Ensure the system is shut down and there is no
trapped air under pressure in the piping.
B.
Remove the piston plug.
C.
Remove the spring (FS-4 only). Use care when han-
dling spring to prevent distortion.
D.
Remove the piston.
E.
Clean all parts with cleaning agent.
noTe
ensure cleaning agent does not contain solvents
which can degrade polysulfone. Warm water and
detergent is recommended for cleaning. allow all
parts to dry thoroughly before reassembly.
Reassemble the flow switch in reverse order.
figure 5-1. Disassembly / assembly of flow switch
sectioN 5
maiNteNaNce
Summary of Contents for 550
Page 4: ... table of contents ...
Page 20: ...20 section 2 description ...
Page 30: ...30 section 5 maintenance ...
Page 35: ...35 section 6 TROUBLESHOOTING ...
Page 38: ...12 5 4 2 17 14 3 11 7 8 16 10 9 13 6 15 section 7 replacement parts ...
Page 40: ...40 notes ...
Page 41: ...41 notes ...
Page 42: ...notes ...
Page 43: ...Original release 06 2006 03 2007 Revised Title Page layout text revision history ...