E0013 360 Top Arm Angle Switch

Figure 1 Angle Switch

Angle Switch Spare Part Number = EL-34354

Refer to circuit diagram SB7474-85.DWG

An angle switch is fitted to each top arm adjacent to Top Arm Lifting Cylinder Ram Eye. The purpose of the angle switches is to prevent the 'cutting out' of the Top Arm Up and Bottom Arm Down functions if the stabiliser foot lifts off the ground during a lift, unless the top arm angle is over 71° from horizontal.

The angle switches switch-off when either top arm angle exceeds 71°, however if both stabilisers are in contact with the ground full arm function is retained. If either stabiliser lifts off the ground then power is lost to the safety bypass relay (R13/B) and arm functions will be limited to Top Arm Down and Bottom Arm Up. In order for the Relay (R12/B) to be reset (thereby restoring full arm functions) the load will have to be manoeuvred so as to restore pressure to both Stabiliser feet.

Upon initial start-up both Stabiliser feet will have to be in contact with the ground before Top Arm Functions are available.

Switch-on point; in horizontal position (±1°) when the cable end is moved upwards

Switch-off point; the switching hysteresis is exceeded by moving the cable end downwards

Switching hysteresis; 2.5…5.5°

Repeatability; <0.2°

Black (BK); Power Supply 10.30V DC

Brown (BN); Earth

Blue (BU); Switched Signal

The angle switches are wired in series, the rear angle switch Signal (BU) powers the front angle switch

In Service adjustment of the angle sensor is performed as follows;

1. The recommended method of accurately setting the switch-off point is to lift an empty 20ft container and suspend the non stabiliser side of the container just above the off-side bash plates and at a distance beyond the bash plate at which you wish the safety function to cut-in. The factory setting is 0mm (zero mm i.e. in-line), measured horizontally from the top of the bash plate to the outside edge of the container. EXTREME CAUTION SHOULD BE EXERCISED! Manoeuvring a container of any weight beyond the off-side bash plates is dangerous; no personnel should be present in the danger area!
2. In the rear module junction box, probe between earth and block 13. Loosen the adjusting screws A & B in Figure 1. Swivel the Angle Switch until voltage is read, i.e. the switch has turned-on. Leave the rear switch as-is and proceed to the front top arm angle sensor.
3. In the front module junction box, probe between earth and the blue wire side of the small diode. Loosen the adjusting screws and carefully swivel the angle switch until the switch-off point is reached. Tighten the adjustment screws. The front angle switch is now set.
4. Return to the rear module junction box, probe again between earth and block 13. Carefully swivel the angle switch until the switch-off point is reached. Tighten the adjustment screws. The rear angle switch is now set.

USING EXTREME CAUTION, test the functionality of the system by first positioning the container squarely above the twistlocks. Carefully lift one stabiliser leg so that a gap appears between the stabiliser extension and stabiliser housing, but not enough to lift the foot from the ground. The stabiliser warning beeper should sound. With one end of the container only carefully manoeuvre the container above the offside bash-plate and observe the cut-out position. The same procedure should be followed for putting the container onto the twistlocks, but no functional cut-out should be observed.