Filter
Top Products
IW4/IW7 WB/WBV Description
D1 0412BA1-GB04 5
To be able to effectively use this, the exact backlash of teeth is assessed in a learning mode:
Initially the left drive motor will be switched on to accelerate the left vehicle wheel to nominal
speed. As the right drive motor is switched off and thus running free, the left wheel is dragging
the right wheel along. The flanks of a tooth in the differential touch each other on one side. Now
the first limit position of gear play is measured by the reflector strips and the photo electric cells.
The procedure is now reversed, the left drive motor of the roller set is switched off and the right
vehicle wheel is accelerated to nominal speed. This time the left wheel is dragged along and in
the differential the flanks of teeth touch each other on the opposite side. The second limit
position of the gear play will now be measured. Out of the two measured limit positions the
center of gear play is calculated. This "center of gear play" is used to control the rotation of
wheels during the brake test.
During the brake test, both drive motors are accelerated to a speed where the "center of gear
play" is reached. One vehicle wheel will rotate forward, the other in opposite direction. As soon
as the nominal speed is reached by both wheels, and no brake torque is being transferred to the
drive shaft, brake testing may be started.
As with standard vehicles the drive motors will be switched off if excessive slip occurs.
1.3 Technical Data
1.3.1 Electrical Data
IW7
(4 wheel drive)
IW4
(4 wheel drive)
Voltage supply 400 V, 3 Phases, 50 Hz 400 V, 3 Phases, 50 Hz
Special voltage 230 V, 3 Phases, 50 Hz 230 V, 3 Phases, 50 Hz
Motor drive capacity
IW7/1 2 x 7,5 kW IW4/1 2 x 7.5 kW
IW7/2 2 x 11 kW IW4/2 2 x 9 kW
IW7/3 2 x 11 kW
IW7/4 2 x 7,5 kW
Star delta starters for motors with IW7/1 E, IW7/2 E, IW4/1 E and IW4/2 E
Dahlander-control system for IW7/3 E and IW7/4 E
Main switch fuse Main switch fuse with special voltage
IW7/1 and IW7/4 50 A slow IW4 (4 wheel drive) 63 A slow
IW4/1 35 A slow IW7 (4 wheel drive) 100 A slow
IW4/2 50 A slow
IW7/2 and IW7/3 63 A slow
Only trained electricians or authorized service technicians are allowed to carry out work on
electrical parts of the brake tester. (Control box, roller set, etc.)