Husqvarna BT 90 Operator's Manual page 18

4. Loosen the locknuts (B).
A
5. Adjust the tension at each joint with the stretching
screw (C) until the full length of the product is
straight.
6. Tighten the locknuts (B).
7. Look at the bottom edge of the product and the
string to make sure that the product is straight.
Direction of rotation
You get the best results if the shaft rotates in the
opposite direction of the operation direction. The tension
in the winch cables are kept and it is easier to control
the movement of the product.
If the product has a fuel drive unit, it is necessary to lift
and turn the product around to change the direction of
rotation.
If the product has an electric drive unit, refer to
the direction of rotation for the BT 90 E drive unit on
page 18 .
To set the direction of rotation for the BT 90 E
drive unit
The direction of rotation is set with the phase selector in
the electrical connection on the product.
1. Put a screwdriver in the slot.
2. Push in the screwdriver and turn the screwdriver a ½
turn.
18
B
C
To set
To adjust the angle between the truss
screed sections
CAUTION:
more than ±3% as this decreases the life of
the shaft coupling.
1. Assemble the truss screed sections. Refer to
Assembly on page 9 .
2. Loosen the 4 nuts for the screws (A) at the joint
between the truss screed sections.
3. Make sure that the thread of the screws are clean
and there is no concrete.
4. Turn the stretching screw (B) to adjust the angle.
5. Tighten the nuts for the screws (A).
6. Tighten the locknut (C) to lock the stretching screw.
To start the product
First time start of the product after installation
You must do maintenance on the BT90P when it has run
for one hour, if it is the first time it is started after it has
Maintenance schedule on page 21 .
been installed. See
To start the electric drive unit (BT 90 E)
1. Make sure that the frequency and voltage shown on
the rating plate is the same as the power supply
voltage.
2. Connect the power plug of the drive unit to the power
supply.
3. Start the drive unit.
4. Examine the direction of rotation of the vibration
shaft. If the direction is incorrect, change to the
opposite direction. Refer to
rotation for the BT 90 E drive unit on page 18 .
To start the fuel drive unit (BT 90 G)
1. Fill engine oil. Refer to the engine manual.
2. Fill fuel.
3. Open the fuel valve.
4. Set the choke control in the correct position.
a) If the engine is cold, close the choke.
Do not increase the angle to
C
B
A
To set the direction of
992 - 002 - 11.10.2023