Dismounting / mounting of the start / stop valve.
Fig 1 is showing how the start / stop valve must be assembled.
A special tool is needed in order to take out the seat of the start / stop valve (fig 2)
Please use "Puller for valve seat M4" item number 31000189.
NOTE: the valve seat is no longer usable after using the puller.
Service / Repair.
Fig. 1
Fig. 2
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D