ABB UCL, Installation And Commissioning Manual, Page: 49 / 56

1ZSC000562-AAZ en | Installation and commissioning guide UCL/VUCL 49
9.2.4 Mounting of horizontal drive shaft for one unit
1. Fit the square shaft SA22, protective tubes SA23 and
SA24 and hose clips according to Fig. 34.
2. Connect the square shaft with the mounted coupling
halves to the shaft of the bevel gear; see Fig. 52. Mount
two coupling halves SA11 to the other end of the square
shaft and the shaft of the other bevel gear. Push the shaft
to the bottom of the fitting in the coupling halves; see
Fig. 31. Tighten the screws lightly and check that the shaft
can be moved approximately 2 mm in the axial direction
(axial play).
Check the dimension shown in Fig. 30. Tighten the two
screws; A first and then the other; see Fig. 32.
3. See Figs. 24 and 25. The motor-drive mechanism and the
tap-changer should have the same indicated tap position
and be at their
exact positions.
The motor-drive mechanism and the tap-changer are at
the same position when the position indicators for both of
them show the same position.
The motor-drive mechanism is at the
exact position since
the steps in Section 9.2.2 have been carried out.
The tap-changer is at the
exact position when the window
where the position is read on the bevel gear is exactly
facing the red mark in the gear box housing.
SA21 SA11
Fig. 52.
If the gear box is not at its exact position, carry out
point 5 and loosen the two screws in the multi-hole
coupling on the gear box and find the position of the
screws that positions the opening in the brass-toothed
wheel closest to the red mark in the gear box housing.
The maximum deviation from exact alignment is given in
Fig. 24. Tighten the screws.
WARNING
Assembly with the tap-changer and the motor-drive
mechanism in different operating positions may cause
transformer failure.
4. Push the two protective tubes onto the bevel gears and
clamp them with hose clips SA10; see Fig. 42.
The slot of the protective tube SA23 should be facing
downwards.
The self-adhesive information plates SA25 are at about the
middle of the tube length.
Do not remove the locking device before one end of
the shaft of the bevel gear is connected to the drive
shaft.