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7.
Changing parts
Valve needle (KS-1, KS-1L, KS-1M and KS-2)
>
Unscrew the valve sealing screw (20)
>
Remove the spring (19)
>
Unscrew the nozzle nut (1)
>
Unscrew the valve seat screw (4)
>
Push the valve needle, cmpl. (15) out towards the back using a suitably shaped
(but not sharp-edged) object made (for example) of wood or plastic.
The back end of the valve needle, cmpl. (15) is pushed from the back section of
the main element (12).
>
Completely pull out the valve needle, cmpl. (15)
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Unscrew the valve needle (16) from the needle bolt (18)
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Screw the needle pusher (17) onto the new valve needle (16)
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Exactly set the length (70 mm +0.2)
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Screw the needle bolt (18) onto the valve needle (16) and
>
counter against the needle pusher (17)
Needle reinforcement (KS-1D)
>
Unscrew the nozzle nut (1)
>
Unscrew the valve seat screw (4)
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Loosen and unscrew the needle reinforcement (50) from the lock nut (51)
If only the needle reinforcement (50) is to be replaced:
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Screw on the new needle reinforcement (50)
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Set a dimension of 24.5 mm using a calliper gauge and
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counter using the lock nut (51)
If parts (17, 18, 19 and 52) are also to be replaced:
>
Remove the needle reinforcement (50) and lock nut (51), then
>
unscrew the sealing screw (20)
>
Remove the spring (19)
>
Push parts (17, 18 and 52) out towards the back using a suitably shaped (but not
sharp-edged) object made (for example) of wood or plastic
The back end of the needle bolt (18) is pushed from the back section of the main
element (12).
>
Completely pull out parts (17, 18 and 52). These parts are generally not
dismantled any further
Needle packing (KS-1, KS-1D, KS-1L and KS-2)
After removing the valve needle, cmpl. (15) - or, in the case of KS-1D - the parts (17 to
19 and 50 to 52):
>
Loosen the hex nut (14) and remove,
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together with the insulation washer (13)
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Pull the head section (6) towards the front and out of the main element (12)
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Pull the insulating sleeve (11) and the insulating washer (9) off the seal screw (10)
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Unscrew the seal screw (10) from the head section (6)
>
Remove the packing parts, each consisting of two gaskets (7) and two cup collars
(8). (Use a wire hook to pull out the packing parts. Take care not to damage any
threads!)
Then thoroughly clean all reusable parts.
Assembly:
>
Install new packing parts, each consisting of two gaskets (7) and two cup collars
(8), in the described sequence and direction; do not damage the sealing lips! Do
not use pointed or sharp-edged objects during installation!
>
Loosely screw the seal screw (10) into the head section (6)
>
Push the insulating sleeve (11) and the insulating washer (9) over the seal screw
(10)
11
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