FRITSCH PULVERISETTE 1, Model I classic line - Manual (Page 15)

Page 13
2. Lift off the rubber seal on the funnel opening of the jaw crusher. To do so,
remove the 4 cylinder head screws with washers using the Allen key.
3. Pull the rubber seal over the funnel neck. Take note of the positions of the
holes in the filling funnel and rubber seal.
4. Insert the filling funnel into the funnel opening on the top of the laboratory jaw
crusher.
5. Screw the filling funnel onto the housing with the 4 previously removed
cylinder head screws and washers.
6. The cylinder head screws must be screwed in tightly to ensure that the rubber
seal is pressed down and will not leak.