Avdel 753 MkII type Betriebsanleitung Seite 74

P i l o t Va l v e 0 7 0 0 5 - 0 0 5 9 0 - M a i n t e n a n c e
D i s m a n t l i n g I n s t r u c t i o n s
Please note that these service instructions refer to the Compair valve where fitted.
Servicing of the valve is limited to the removal/replacement of 'O' rings.
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Remove Screws 24 and remove pilot assembly .
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Remove Piston 11 and discard 'O' Rings 3, 10, 4 and 5.
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Remove Screws 26 and 21 and remove End Caps 22 and 25.
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Withdraw Pistons 12 and 18 and remove 'O' Rings 7 and 9 from pistons.
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Withdraw Spool 16 from bore, taking care not to damage surface of spool and remove location Washers 14 and 17, 'O' Ring 8,
Spacers 15 and 'O' Ring 6 from each end of valve body.
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Remove five interface 'O' Rings 4.
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Discard ALL 'O' rings removed.
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Clean all parts with paraffin or white spirit. DO NOT USE SOLVENTS. Dry all parts.
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Lightly smear bores of valve Body 23, pilot valve Body 19, both End Caps 22 and 25 and all replacement 'O' rings with
CENTOPLEX 2 grease.
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Fit new 'O' Rings 10, 4 and 5 to Piston 11 and insert into pilot valve body.
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Fit new 'O' Rings 3, 10 and 6 to pilot valve body, place Top Cap 20 in position and secure pilot valve assembly to main valve Body
23 with Screws 24. Ensure that the interface seal housing faces upward with the G1/4 at the bottom. Ensure orientation of Piston
11 is correct.
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With main valve Body 23 in the same position, fit green location Washer 17 to the left hand side of the valve assembly.
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Starting from the right hand side of the valve, assemble alternately 'O' Rings 8 and Spacers 15 (6 seals and 5 spacers) and finally
complete the stack assembly with white location Washer 14.
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Lightly smear Spool 16 with CENTOPLEX 2 grease, supplied with the service kit, and slide spool through seal/spacer stack.
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Fit 'O' Rings 9 and 7 to respective Pistons 18 and 12, fit 'O' Rings 6 to ends of main valve Body 23.
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Insert pistons into End Caps 25 and 22 and assemble end caps to valve, taking care to locate piston shafts into holes in the ends
of Spool 16.
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Secure end cap assemblies to main valve Body 23 with Screws 26 and 21.
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Fit interface 'O' Rings 4 into their housings in the main valve body.
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If the pipe connection to the pilot assembly is damaged, replace Plastic Collet 2 and lift out the 'O' Ring 1 from Cartridge 27.
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Fit new 'O' Ring 1 and insert Plastic Collet 2 into Cartridge 27.
Priming is ALWAYS necessary after the tool has been dismantled and prior to operating.
Item numbers in bold refer to the illustration and parts list opposite.
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I M P O R T A N T