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1. Filter. 2. Motor 3. Gear pump 4. One-way valve 5. Overflow valve 6. Descent velocity
regulating valve 7. Electronic unloading valve (manual unloading valve) 8 throttle valve or
explosion-proof valve 9. Main oil cylinder 10 Auxiliary oil cylinder
Chapter VIII Operating Instructions
1. Pre-commissioning
1.1 Inspect motors to check whether its power supply is accurately installed or whether it
can be normally used.
1.2 General 2# lithium base grease (GB7324-87) shall be applied to moving contact surface
of slides. It is required that all sliding surface from top to bottom shall be uniformly
painted.
1.3 Hydraulic oil in oil tank shall be sufficient to use.
1.4 Inspect steel wire rope, rope wheel and wheel and axle.
1.5 Inspect connecting bolt to check whether they are firm.
2. Operating process:
The hoist shall be conducted for 200~300mm before commissioning, depending on whether
two slides are synchronous and provided with equal height. Otherwise the commissioning
shall be started after adjustment. The vehicle shall be driven to middle part of two vertical
columns, and the manual brake of car shall be well pulled. The bracket arms and trays shall
be adjusted to make the bearing point to support the bearing surface of car. The inspection
on whether there is barrier shall be carried out. Persons shall not approach it or lift with
overweight. Press down “RISING” button in control cabinet and connect contactor. After the
motor powers up, the hydraulic oil will be extracted. In addition, such hydraulic oil will be
flowed into oil cylinder via high-pressure oil pipe. With the oil pressure, oil cylinder propels
piston and piston rod. In this case, slides and bracket arms start to rise. Upon vehicle
maintenance, the lock button shall be pressed down. In this case, solenoid valve for oil
return powers on and oil return valve is opened. The slide descends if the pressure of
oil-way is lost. Safety block will reset under the effect of spring and self-weight. Meanwhile,
the slides are locked. Upon the completion of vehicle maintenance, the “down” button shall
be pressed down. After the lifter is lifted for 2 seconds, the safety will be opened to allow
lifter descend. The operation will be ended.
3. Cautions:
3.1 Each kind of automobile differs in centre-of-gravity position. Centre-of-gravity position of
automobile shall be understood at first. When automobile enters the lifter, the center of
gravity shall get close to plane formed by both vertical columns. The rocker arm shall be
adjusted to allow bearing point to be on bearing surface of car.
