15
Dismantling and assembling the Helium Tight and Corrosive
Gas Models
➡
Unscrew valve housing 68 at hexagon nut, take care with
the O-ring 31; if necessary proceed as follows:
– Remove circlip 59 and pull off sleeve 61, insert round
steel bar into boring and remove valve housing 68
taking care with the O-ring 31.
➡
Remove circlip 67 and dosing insert 66 from dosing valve
body 64.
➡
Clean all parts.
➡
Check O-rings 65 and 69 for wear and replace if necessary.
➡
Lightly oil O-rings with operating fluid.
➡
Re-assemble the parts in reverse order.
6.4. Cleaning The Gas Ballast Valve
Gas ballast valve 45 can only get dirty if the ambient air
sucked in is dusty.
Dismantling and assembling the Standard Model
➡
Unscrew valve housing 68 at hexagon nut, take care with
the O-ring 31; if necessary proceed as follows:
· Remove circlip 59 and pull off sleeve 61, insert round
steel bar into boring and unscrew valve housing 68
taking care with the O-ring 31.
➡
Clean all parts.
➡
Check both o-rings 60 for wear and replace if necessary.
➡
Lightly lubricant o-rings with operating fluid.
➡
Re-assemble the parts in reverse order.
6.5. Cleaning The Silencer
Dismantling and assembling
➡
Remove the silencer 47 ... 50 and 129 in axial direction and
clean it.
➡
Check o-rings 48 and 49, valve spindle 47 and valve seat in
13 for wear, replace if necessary.
➡
Reassemble in reverse order.
Carefully push o-ring 48 into the groove in part 47 and light-
ly lubricate with operating fluid. The o-ring 49 must be
fitted around part 129.
