stertil-KONI ST 1082-F/BAT, Installation, Operation And Service Manual, Page: 28 / 52

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7.5 MAINTENANCE SWITCHES
Maintenance switches are located inside the control box to assist the technician when servicing the
lifting system (see fig. 8.1). These switches can be used to check the correct functioning of the
lowering valve, unlock solenoid and the hydraulic unit. As long as the control system is still functional,
the switches can also be used to check the safety margins for control.
Switch
Description
Function
DOWN *
Lower and unlock.
Operates the lowering valve and the
unlock solenoid on the lifting column at
which the switch is operated.
UP *
Lifting.
Operates the electric motor on the lifting
column at which the switch is operated
(lifting column raises).
SET+
Lifting without safety limits
SET -
Lowering without safety limits.
These switches lift and lower all the
lifting columns in the loop. The safety
margins of 1 1/4" and 2 1/2" will be
ignored. The system will control the
heights of the guide blocks so they
become level.
* To make the use of “UP” and “DOWN” possible the MS relais (see page 38) must be bypassed. Turn-off the main
switch and reconnect the red cable coming from the 200 AMP fuse to the other side of the relays. (under the nut of the
interconnecting black cable) Turn on the main switch.
7.6 REMOVAL/INSTALLATION OF THE LIFTING CYLINDER
To remove the cylinder:
- At the top of the lifting column, remove the plastic cap and the nut and washer.
- Lift the guide block to the maximum height and then lower it to the first catch position.
- Push the SET REF and
⇓
(DOWN) buttons to lower the cylinder. It will take approximately
2 minutes for the cylinder to lower completely.
- At the bottom of the cylinder, release the hydraulic connection.
- Lift the cylinder approximately 3/4" to release the bottom of the cylinder from the notch.
Pull the cylinder forward and away from the guide block.
- Remove the elastic ring from the cylinder head.
To install the cylinder:
- Place the elastic ring on the cylinder head
- Position the cylinder inside the guide block and engage the notch in the hole in the bottom plate of the cylinder.
- At the bottom of the cylinder, connect the hydraulic connection.
- Push the SET REF and the
⇑
(UP) buttons to lift the cylinder.
- Release the buttons when the cylinder starts to lift the guide block (the cylinder head must be positioned through
the hole in the head plate).
- Press SET REF and the
⇓
(DOWN) buttons to lower the guide.
- Mount the nut and the washer.
- Push the SET REF and the
⇑
(UP) buttons and open the air bleed until a continuous flow of oil appears. Close
the air bleed and install the cap.