stertil SP 2522, Operation Manual

Page: 66 / 176

Operation Manual (Version: B) 22 Type SP
3.4.1 BDC (option)
When the loading floor of the truck is lower than the level of the dock platform, and
is loaded to the end with cargo, there is no room for the lip to rest on the loading
floor of the truck.
The optional Below Dock Control (BDC) makes it possible that the deck descends
below dock level with a completely pendant lip. This makes it possible to load or
unload the cargo closest to the end of the loading floor.
3.4.2 AR (option)
The optional Auto
R
etur
n
(AR) returns the dock leveller to the parked position after
(un)loading, with a single touch of the ‘AR’ button.
This option is available with the SSC and SMC control boxes (not on the basic
control box).
3.4.3 PLS (option)
The Park Limit Switch (PLS) detects the parked position of the leveller and can be
used as an extra safety device.
For example: with the PLS it is possible to disable control of the door when the
leveller is not in parked position.
3.5 Functional description
The dock leveller SP-type is a leveller with a 'standing' type frame and a swing lip.
The SP-type is designed for installation in a closed pit.
The deck is positioned by means of one hydraulic cylinder at the front. The deck
can twist smoothly to both sides to adapt itself to uneven loaded trucks, see
Lateral tilt (on page 15).
During the loading or unloading process, the leveller adjusts itself to the changing
floor height of the truck.