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This example is done on a MARCO P1/2-E but applies to any horn that needs an electric valve to operate. These valves need periodic cleaning due to dirt in the pressure system.
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Use the socket wrench to rotate the valve.
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Unscrew the fixing nut using the wrench.
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Don't lose the pieces: put them in order in a safe place. A good example is a white sheet of paper.
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Remove the solenoid (the black plastic box).
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Carefully unscrew the head of the valve: it could be hard to remove due to the threadlocker.
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Use the Rib Jonit plier and apply a counterclockwise rotation on it.
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Finish the unscrewing by hand.
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Don't lose the head: put it, again, in a safe place.
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Gently tilt the whole thing and the spring and piston should exit the valve.
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Inspect them for cleanliness and put them in a safe place.
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Blow in the valve with compressed air to clean it
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Blow on the piston and other pieces, if dirty, as well.
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Place the piston, first.
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Then put the spring in the piston's hole.
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Put some threadlocker on the thread
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Don't exceed: you may permanently damage the device!
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Screw the head on the valve.
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Use the plier to tighten valve's head: there's no need to tighten it too much.
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Insert the solenoid and put the washer on the top.
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Finally, screw the nut with the wrench.
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Set the valve back in place, using the wrench.
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Keep your valves checked, if you want them to last longer!
Keep your valves checked, if you want them to last longer!
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