(a) Place longeron (cover) (98) close enough to the arm that the mobile
spring holder (L) lies on the head piece (94).
(b) Pull cabling through the spring holder.
(c) Insert cabling flat in the longeron (cover), put on profile (99), and
stick the two together with adhesive. Make sure that the distances upwards and
downwards are equal.
Wait at least one hour for the adhesive to dry.
(e) Attach the tension rear (102).
Pull cabling through the intermediate piece.
(g) Check that the lead is in the correct position. It must lie flat on the
roller (116) in the intermediate piece.
(h) Place a washer between the head piece and the longeron (cover)
on each side.
(i) Insert the hexagonal head screw (104) in such a way that it goes
through the middle of the cabling. Screw into the tension rear with about 10 rotations.
(j) Fit the other side of the scissors arm with the cover (112), profile
(99), the hexagonal head screw (119), washers (97), and bearings (87) to the head
piece (113) and the intermediate piece (86) in the same way.
Secure the scissors arm with the safety strap.
(m) Add tension the tension springs.
(n) Counterbalance the weight as described in Lesson 1, Perform
Preventive Maintenance Checks and Services on the Inter-oral Dental X-ray, paragraph
Replace all cover caps.