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When horizontal and vertical driving shafts are over two meters, an intermediate support gear box must be
added. The installation of the specially designed bevel gear box, steering gear box and the intermediate
support gear box of the vertical or horizontal driving shaft can be carried out according to the above
instructions.
The gear box is fixed on the mounting flange with 3 pressing plates (each board with 2 bolts), and the angle
can be adjusted according to user requirements. (See Figure-9-2)
a. Loosen the pressing plate of the gear box and pull out one end of the board slightly (6 pieces of M8 bolts,
13mm wrench).
b. Turn the gear box to the required installation position by rotating the drive shaft of the gear box.
c. Tighten the gear box pressure plate, and tighten the bolt (torque 15 N.m.).
Figure-9-2
9.5 Installation of horizontal and vertical drive shafts
a. Install the horizontal and vertical driving shafts according to the relevant Huaming driving shaft
instruction manual.
b. Connect the driving shaft with motor drive unit and tap-changer according to the instruction manual of
Huaming motor drive unit. (See Figure-9-3)
c. Intermediate gear box should be added.
1. The gear box mustn’t rotate on its own.
2. W
hen rotating the gear box, pay attention to avoid bumping the pressure relief valve
(if existing.)
Incorrect adjustment of the gear box can cause damage to the tap-changer! The gear
box can only be adjusted when the pressure ring is loosened. It must not rotate when it
is adjusted. Only turn the drive shaft to adjust the gear box.
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