Metallisation MK 73 - Flowmeter Specific Troubleshooting

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5.1.2 Flowmeter Troubleshooting:
Example Readings:
Use DIAG 19 (above) and the following information to determine the usability of the
pistol under specific flowmeter conditions:
Note (a)
This type of reading, with both floats equally high and pressures correct, can be due to:
 Oversize nozzle holes or oversized air nipple or too little air pressure.
 Mixing Block holes too large (This mainly with Fine Spray Nozzle Systems).
 Pressure Gauges reading too low.
In all cases, the pistol will be quite usable if the flowmeter readings are within 15% of
recommended readings. Spray throughput may be increased.
PROBLEM
POSSIBLE CAUSES
REMEDY
OXYGEN FLOAT - NORMAL
GAS FLOAT - LOW
Restriction in Nozzle
Gas hole in Mixing Block
restricted
Clean Nozzle with special
Metallisation cleaners
Clear or replace Mixing Block
OXYGEN FLOAT - HIGH
GAS FLOAT - LOW
Middle ‘O’ Ring at rear of
Mixing Block missing /
damaged
Replace ‘O’ Ring
OXYGEN FLOAT - LOW
GAS FLOAT - LOW
Outer ‘O’ Ring at rear of
Mixing Block missing /
damaged
Replace ‘O’ Ring
OYGEN FLOAT - LOW
GAS FLOAT - HIGH
Restriction in Mixing Block
oxygen holes missing /
damaged
Clear or replace Mixing Block
Note (a)
CORRECT
Note (b)
CORRECT
Note (c)
INCORRECT
DIAG 19