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17.5
RCA regulator maintenance
Loosen the spring support (11) with a spanner number 19. Unscrew until remove it. Along
with the spring support (11) will leave the seal, the regulation valve (1) and the balance spring
(10).
After checking the good condition of the elements if necessary clean with compressed air or
with a cloth or paper moistened with alcohol.
Check that the internals of the body and especially the regulating valve (1) have no
deterioration. Anyway clean with compressed air or with a cloth or paper moistened with
alcohol.
If visual inspection shows important dirtiness, in addition to the above steps, the regulator
must be disassembled completely. To do it act as follows:
Unscrew the connection (2) that connects the valve body (9) with the flowmeter M21.
Unscrew the connection (4) that connects the body of the membrane (7) with the "T" on the
fluid outlet.
Unscrew the 6 screws M6 (6). Remove them with the washers.
Pull apart the bodies (7) and (9). The spring (5) and the membrane (3) will be visible.
Clean with compressed air or with a cloth or paper moistened with alcohol.
To reassemble the set, follow these steps:
Place the membrane (3) so the holes match the threaded holes in the valve body (9). Note
that the valve guide (8), which acts as stop of the center of the membrane, has a hole whose
function is to guide the regulating valve (1) and it has to be on the inner side of the valve
body (9).
Place the spring (5), centering it by the valve guide (8) and making it rest on the PTFE disk of
the regulating membrane (3).
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