Bosch TCA640 Series Repair Instruction page 54

6.2.3 Greasing the brewing unit
During a service, the O-ring for the coffee outlet (A), the lip seal
surrounding the brewing head (B), the O-ring for the water inlet (C)
and the coupling for the input shaft (D) must be thinly greased with
food-safe special lubricating grease PARALIQ® GTE 703 Mat.-no.:
31 0574.
Note:
After replacing the O-ring for the coffee outlet (A) or for
the water inlet (C) they must be thinly greased with food-
safe special lubricating grease PARALIQ® GTE 703
Mat.-no.: 31 0574.
58300000120060_ARA_en_c.doc – 18.09.09 Seite 54 von 95