Normally on the home lift oil pump we have three solenoid valves to control the platform get down: fast valve, slow valve and close valve. Fast valve and slow valve will let the platform get down to floors very smoothly, speed will slowly become zero. Close valve is to ensure the oil will not drain back to oil tank when cabin stay at certain floor, so cabin will stay at certain floor for long time and without changing the position.
To adjust getting down speed, you can adjust slow valve and fast valve by turn the handles next them. But we already adjust them before shipping. So better not adjust it anymore.
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