The Harder & Steenbeck Revision Set 712330 is a complete collection of replacement O-rings and seals for servicing compatible Harder & Steenbeck airbrushes, including the Evolution Classic and Evolution Silverline. It allows you to replace worn seals around key areas such as the nozzle, needle, gravity cup, air valve and main body of the airbrush.
What is an airbrush revision set? A revision set contains seals that can wear through regular spraying, repeated cleaning and long-term use. When an O-ring or seal no longer closes properly, it may affect airflow, paint flow or the general operation of the airbrush. Replacing worn seals during maintenance helps solve common sealing issues and keeps the airbrush working reliably.
This version carries part number 712330 and is designed as a maintenance set for compatible Harder & Steenbeck airbrushes from the classic ranges. The combination of conventional O-rings and PTFE seals covers several important sealing points, making the kit useful for both targeted repairs and more extensive servicing.
The revision set contains:
Each component has its own position and purpose inside the airbrush. The PTFE Nozzle O Ring helps seal the connection around the nozzle, while the Air Cap O Ring provides the required seal at the air cap. The PTFE Needle O Ring and Needle Packing work around the needle area and support controlled, leak-free operation through the paint path.
The set also includes replacement seals for the gravity cup and air valve system. The PTFE Gravity Cup O Ring seals the relevant connection around the gravity cup. The Air Valve Body O Ring, PTFE Upper Air Valve Seal and Valve Stem O Ring are used within the air valve assembly and help maintain a dependable air seal. The Main Body/Handle O Ring seals the relevant body connection, while the Quick Connect Seal for the plug-in nipple replaces a worn seal in the quick-connect fitting.
How do you use the Harder & Steenbeck revision set? Only disassemble the section of the airbrush that requires maintenance and keep the removed components organised. Carefully remove the old O-ring or seal, clean the contact area and install the matching replacement part. Avoid twisting or overstretching O-rings during installation, and do not use sharp tools that could cut or damage the new seal.
Extra care is useful when working with the Needle Packing. This component provides a seal around the needle while still allowing the needle to move smoothly. After servicing, check that the needle can travel forwards and backwards without excessive resistance. A packing that is adjusted too tightly can restrict needle movement, while insufficient sealing may allow paint to travel farther back into the airbrush body.
For miniature wargamers, scale modellers and board gamers, reliable airbrush maintenance is especially useful when the airbrush is frequently used for primers, base coats, highlights, camouflage, filters and scenery painting. A properly maintained airbrush generally responds more consistently and reduces the risk of a worn seal interrupting a painting session. This is useful when working on miniatures, vehicles, terrain pieces, dioramas and other modelling projects.
The set is suitable for both beginners and experienced airbrush users. Beginners can keep a useful collection of common replacement seals available for routine servicing, while more advanced users can use the set as part of a more thorough airbrush overhaul. Internal seal replacement still requires careful work, so checking the exploded view or manual for your specific Harder & Steenbeck model is recommended before installing each part.
A key advantage of this revision set is that several important replacement seals are supplied together in one package. This saves you from sourcing each O-ring separately when maintaining an older or frequently used airbrush. The Harder & Steenbeck Revision Set 712330 is therefore a practical maintenance solution for hobbyists who want to keep their airbrush operating smoothly, accurately and reliably over time.
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