Section 5 Maintenance; Inspection And Cleaning; Flow Switch - ESAB Powercut 650 Manuel D'instructions

SECtIoN 5
CAutIoN
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 electri-
cal 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 at-
tempting any inspection or work inside
of the PoWErCut 650.

5.0 INSPECtIoN AND ClEANINg

Frequent inspection and cleaning of the POWERCUT 650 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 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.
G. With all input power disconnected, and wearing proper eye and face protection,
blow out the inside of the POWERCUT 650 using low-pressure dry compressed
air.
5.1 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 handling spring to prevent
distortion.
D. Remove the piston.
E. Clean all parts with cleaning agent. Ensure cleaning agent does not contain
solvents which can degrade polysulfone. Warm water and detergent is recom-
mended for cleaning. Allow all parts to dry thoroughly before reassembly.
Reassemble the flow switch in reverse order.
SPRING

FLOW SWITCH

figure 5-1. Disassembly / Assembly of flow Switch
115
MAINtENANCE
PISTON PLUG
PISTON