Hypertherm HT4400 HySpeed Plasma Arc Cutting System - Manual (Page 133)

HT4400 Instruction Manual 5-43
7
Gas flows (cont.)
Ȟ P Ȟ NP 17. Perform gas leak test
A. Oxygen pressure drop at ____________
psi in 10 minutes ( ____________ bar)
B. Nitrogen pressure drop at ____________
psi in 10 minutes ( ____________ bar)
Ȟ P Ȟ NP 18. Inspect for hose restrictions
Ȟ P Ȟ NP A. Motor valve hoses
Ȟ P Ȟ NP B. Gas console to motor valve
Ȟ P Ȟ NP C. Off-valve to torch body
Ȟ P Ȟ NP D. Hoses in power track
Cable connections
Ȟ P Ȟ NP 19. Inspect cables
Ȟ P Ȟ NP A. From IHS probes to IHS console
Ȟ P Ȟ NP B. Control cable from off-valve to
motor valve console
Ȟ P Ȟ NP C. From motor valve console to
power supply
Ȟ P Ȟ NP D. From high-frequency console
and gas console to power supply
High-frequency console
Ȟ P Ȟ NP 20. Inspect for moisture, dust and
particulates
Ȟ P Ȟ NP 21. Inspect spark gap subassembly
Ȟ P Ȟ NP A. Electrode gap range _______
to _______
Ȟ P Ȟ NP 22. Inspect torch leads
System grounding
Ȟ P Ȟ NP 23. Inspect for proper system
component grounding
Ȟ P Ȟ NP 24. Inspect connection from cutting
table to workpiece (+) lead
Power supply
Ȟ P Ȟ NP 1. Inspect for particulates and blow out
Ȟ P Ȟ NP 2. Inspect wiring harnesses
Ȟ P Ȟ NP 3. Inspect main contactor
Ȟ P Ȟ NP 4. Inspect air filter on front of system
Ȟ P Ȟ NP 5. Inspect pilot arc relay
Coolant system
Ȟ P Ȟ NP 6. Inspect filter element
Ȟ P Ȟ NP 7. Perform coolant flow test
A. Coolant flow checked at _________
gallons per minute ( _________ l/min)
Torch main body
Ȟ P Ȟ NP 8. Inspect water tube
Ȟ P Ȟ NP 9. Inspect current ring
Ȟ P Ȟ NP 10. Clean threads on torch front end
Ȟ P Ȟ NP 11. Inspect Vespel torch insulator
Ȟ P Ȟ NP 12. Inspect torch and consumable o-rings
Ȟ P Ȟ NP 13. Verify proper fit of retaining or shield cap
Ȟ P Ȟ NP 14. Inspect hose fittings
Ȟ P Ȟ NP 15. Inspect torch-to-torch-lead connections
Gas flows
Ȟ P Ȟ NP 16. Inspect plumbing from gas supply
Ȟ P Ȟ NP A. Oxygen
Ȟ P Ȟ NP B. Nitrogen
Ȟ P Ȟ NP C. Air
Ȟ P Ȟ NP D. CO
2
Ȟ P Ȟ NP E. Argon-Hydrogen
Ȟ P Ȟ NP F. Methane
Ȟ P Ȟ NP G. Inspect compressed air filter system
Preventive Maintenance Protocol Checklist
Customer:
Location:
Contact:
Date:
Hypertherm system:
System serial #:
System arc hours:
(if equipped with an hour meter)
Comments P – Performed NP – Not present on system
Preventive maintenance performed by: Date:
General comments and recommendations: