300598802_002_C0 - 10/2016 - © Leybold 31
D4/8T:
Tools required:
Allen key 4 mm
Unscrew the two hex head screws (11/2);
Remove the complete gas ballast unit (11/1~9);
Take off the gasket (11/5) and O-ring (11/9);
Clean the parts and check that they are in perfect condition; If not, replace
them.
Disassemble the gas ballast valve body (11/4) and gas ballast valve stem
(11/8) using grip wrench;
Take of the spring (11/7) and non-return valve (11/6);
Clean the parts and check that they are in perfect condition; If not, replace
them.
Remount In the reverse order.
Ordering number of Gas Ballast Valve kit can be found in spare parts list.
Maintenance
1 Gas ballast knob
2 Screw
3 Washer
4 Gas ballast valve body
5 Gasket
6 Gas ballast valve
7 Spring
8 Gas ballast valve stem
9 O-ring
Fig. 11 D4/8T Gas ballast valve disassembled
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