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The new caster weel rotation lock is valid from
The new caster weel rotation lock is valid from version 5, 2002w33–
version 5, 2002w33–
Functionality
Functionality
The castor wheel will be locked from rotation when the left foot switch is used for
The castor wheel will be locked from rotation when the left foot switch is used for
emergency braking, when panic braking with the brake pedal
emergency braking, when panic braking with the brake pedal or if the emergency
or if the emergency
stop switch is used. The caster wheel rotation lock will
stop switch is used. The caster wheel rotation lock will also be applied for different
also be applied for different
kinds of errors that normally activate the electric brake on top of the traction motor.
kinds of errors that normally activate the electric brake on top of the traction motor.
Service and fault finding
Service and fault finding
Current transducers
Current transducers
To increase the safety, two
To increase the safety, two current transducers are used for monitoring the current
current transducers are used for monitoring the current
to the motor brake and the caster wheel rotation lock.
to the motor brake and the caster wheel rotation lock.
If there is a loss of
If there is a loss of current when it would be normal with a
current when it would be normal with a current flow, or if there
current flow, or if there
is a short circuit i
is a short circuit in any of the brake circuits, an error
n any of the brake circuits, an error will be detected and stored in
will be detected and stored in
the error log.
the error log.
If an error is
If an error is detected and the truck is commanded to drive
detected and the truck is commanded to drive in normal (fork/reversed
in normal (fork/reversed
fork) direction, the truck will not
fork) direction, the truck will not stop but the caster wheel lock will be applied. If
stop but the caster wheel lock will be applied. If
an error is detected and the truck is commanded to drive in a
an error is detected and the truck is commanded to drive in a sideway direction the
sideway direction the
truck stops.
truck stops.
If
If the truck was stopped because of a momentary fault, reset is
the truck was stopped because of a momentary fault, reset is done with OFF/ON
done with OFF/ON
from the keypad. If
from the keypad. If the truck was stopped because a permanent fault, that it
the truck was stopped because a permanent fault, that it can only
can only
be moved again if the
be moved again if the load wheel is turned to normal (f
load wheel is turned to normal (fork/reversed fork) direction
ork/reversed fork) direction
and the caster
and the caster wheel rotation lock is emergency hand released.
wheel rotation lock is emergency hand released.
The ATC2 reading of the current transducers can be seen in the menu "Hydraulic
The ATC2 reading of the current transducers can be seen in the menu "Hydraulic
inputs". When in Service menu, no current is flowing through the brake coils and a
inputs". When in Service menu, no current is flowing through the brake coils and a
fixed value between 2,5V and 2,8V should be read for both transducers if
fixed value between 2,5V and 2,8V should be read for both transducers if
everything is OK. The text string in the display shows "B2.5W2.5", where B =
everything is OK. The text string in the display shows "B2.5W2.5", where B =
Traction motor brake and W = Wheel rotation lock.
Traction motor brake and W = Wheel rotation lock.
If there is no
If there is no connection to the ATC2 and the input is open, then approximately 4,8V
connection to the ATC2 and the input is open, then approximately 4,8V
will be read. A
will be read. A broken ground line will also give approximately 4,8V and a
broken ground line will also give approximately 4,8V and a broken
broken
+5V line around 1,5V. Values lower than 2V and higher than 4V are under no
+5V line around 1,5V. Values lower than 2V and higher than 4V are under no
circumstances allowed and an error logging will
circumstances allowed and an error logging will occur.
occur.
Emergency hand release of caster wheel lock
Emergency hand release of caster wheel lock
In the top of the wheel cover for
In the top of the wheel cover for the caster wheel are there two holes with 30
the caster wheel are there two holes with 30 mm
mm
diameter. Under the wheel cover is the brake for the castor wheel lock situated.
diameter. Under the wheel cover is the brake for the castor wheel lock situated.
There are two M5 holes in the br
There are two M5 holes in the brake. If two M5x45 screws are screwed all the way
ake. If two M5x45 screws are screwed all the way
down in those holes will the caster wheel lock will
down in those holes will the caster wheel lock will be emergency hand release
be emergency hand released.
d.
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