AAQ SXJS4019A, Installation Manual & Operation Instructions

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1.4.2 Power unit
The hydraulic system is of hydraulic power unit and it has the function of manually adjusting pressure.
By rotating the adjusting screw of the overflow valve, the system pressure can be adjusted; it also has the
function of manually adjusting lowering speed. By rotating the adjusting screw of check valve, the
lowering speed of platform and cart can be adjusted.
Notice: The system pressure and lowering speed has been adjusted before ex-work and users are not
allowed to adjust at will. After starting the motor, the cylinder acts to realize lifting. After the motor stops,
the airproof function of one-way valve and pressure relief valve can keep the cylinder at the original
height from dropping down. Press the pressure relief valve handle to realize the dropping function.
1.4.3 Control system
Switch on the power, press the up button and release it after reaching the required height, then the
equipment can be stopped. Press the down button and start dropping down. Meanwhile, the lock is open.
Release the down button and then the equipment can be stopped. Press the lock button and the equipment
can be locked.
When it reaches the working height, lock the lift under the unlocking circumstance. In
this way, the platform can be locked by the safety lock effectively to ensure work safety and prevent
the platform from dropping down suddenly. The locking procedure must be done during work!
Frequently check the working condition of the lock. If it fails to lock the platform effectively, timely
repair it (Refer to Common Failure and Troubleshooting) to ensure the effectiveness of the lock. It is not
allowed to use the lift before maintenance.