NOTE: The power unit
information plate shows,
beside every adjustment
screw, the quantity increase
or decrease direction of the
parameter that controls this
adjuster and its name as well.
2.1.4. Adjustment of Valves
1. Upwards acceleration adjustment. Screw 2
1. Load the lift car with half the rated load.
2. Tightening screw 1 makes starting gentler (- accelerated). If screw 1 is tightened fully, the lift will not start-up.
3. Loosening screw 1 makes the lift starts up more quickly and therefore abrupter (+ accelerated).
2. Down speed adjustment. Screw 5
1. Load the lift car with half the rated load. Time how long it takes the lift car to travel down.
2. If the speed is higher than required, loosen screw 5 until desired speed is obtained (- speed).
3. If the speed is lower than required, tighten screw 5 so that down speed increases (+ speed).
3. Upwards and downwards deceleration adjustment. Screw 3
1. Load the lift car with half the rated load.
2. Tightening screw 3 makes the change smoother (- accelerated); it also reduces the time at the levelling speed for a distance of the change signal.
3. Loosening screw 3 makes the change more abrupt (+ accelerated); it also increases the time at the levelling speed for a distance of the change signal.
4. Levelling speed adjustment. Screw 4
1. Load the lift car with half the rated load.
2. Tightening screw 4 reduces the speed, the lift stops smoothly (- speed). ‘If the speed is too low, it could jerk’.
3. Loosening screw 4 increases the speed; the lift stops abruptly (+ speeds).
4. Time at levelling speed depends on the position of contacts in the lift shaft and the adjustment of screw 3.
5. Soft-Stop adjustment. Screw 8. Available in 1 ½” Hydraulic Equipment
1. Load the lift car with half the rated load.
2. Tightening Soft-Stop screw, the lift stops smoothly.
3. Loosening Soft-Stop screw, the lift stops abruptly.
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