Metallisation MK 73, Operating Manual / Spare Parts List

Page: 44 / 64

Page 44 of 64
5.1 Troubleshooting
When incurring any problem with the Flamespray process, it is necessary to first check that
the correct consumable parts i.e. Nozzle Assembly, are fitted and in good condition.
Spraying parameters should also be checked as per
Section 8: Flowmeter Settings .
If the problem still persists, then consult the below tables. These are the most commonly
occurring problems, their causes and the action that should be taken to rectify the problem.
PROBLEM CAUSE REMEDY
Pistol
Does
Not Light
Valve opened too quickly Open Valve less quickly
Spring Washer is weak, missing or damaged Replace Spring Washer (1024)
Nozzle Assembly parts worn, dirty or damaged Replace and insert parts
Incorrect Nozzle Assembly Replace with correct parts
Wire protruding too far forward from Nozzle
Pull wire back until flush with Nozzle front
face
PROBLEM CAUSE REMEDY
Pistol
Backfires
Leaks in Nozzle Assembly
Inspect ‘O’ Rings for damage or loss and
tighten Air Cover
Oversize gas holes in Nozzle Shell Replace Nozzle Shell
Incorrect Pressures
Check that air, gas and oxygen pressures
are as recommended in Section…
Incorrect Nozzle parts Check part numbers (Section 7)
Restrictions in Oxygen/Gas holes in Mixing
Block
Check oxygen and gas ports and clean as
necessary
Debris in Air Nipple Carefully clean Air Nipple
Valve opened too quickly Open Valve less quickly
Wire protruding too far forward from Nozzle Pull wire back until flush with Nozzle face
Wire feeding too fast Slow down wire speed