Suzhou Berlin Special Lifting Machinery Co., Ltd. ChineseEnglish
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Mobile hydraulic lifting platform
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hotline: 0512-66700398
fax: 0512-66701891
switchboard: 0512-66702698
After-sales service: 0512-66702698-8001
Internet service: 0512-66702698-8002
Purchasing Department: 0512-66702698-8003
Contact: Yuan Yongming 13915403158
address: Fuxiang Road (No. 6 Fengye East Road), 230 Road Road, Wangting Town, Suzhou City
Technical Support

Technology and Maintenance

the reason


Lifting platform descends naturally

Check valve leakage

Check the check valves in the valve block. If the sealing surface of the check valve is found to be dirty, clean the check valve.

The drop valve is not tightly closed

Check whether the down valve has electricity. If there is electricity, eliminate the failure of the down valve or replace the down valve. The slide valve of the drop valve must be kept clean and flexible.

Leak in cylinder

Replace the cylinder seal

Lifting platform does not descend

Falling valve failure

With the down button pressed, check that the down valve is energized. If there is no electricity, try to eliminate it; if there is electricity, eliminate the failure of the drop valve itself, or replace the drop valve. The drop valve should be kept clean and lubricated.

Descent speed control valve out of adjustment

Adjust the lowering speed control valve. If the adjustment is invalid, replace the new valve.

Lifting platform does not lift

Voltage is too low

Check the potential of the starter when the motor is under load. Voltage hydraulic range allowed 10%

Motor does not turn

Check motor and circuit

Motor reverse

Arbitrarily change two phases in a three-phase line.

Motor phase loss

Check circuit breaker and motor wiring.

(The motor does not move and there is a buzzing sound)

Open down valve

With the lowering button released, use a voltmeter to check if the lowering valve is energized. If there is no power, check the circuit and remove the fault; if there is power, remove the drop valve itself. The spool valve of the drop valve must be kept clean and flexible.

Low relief valve pressure

Readjust the relief valve. Adjusted at 100% rated load

The oil level is too low and the oil pump is empty

Top up hydraulic oil

Suction filter blocked

Clean filter

Air leakage in the suction section

Check the suction pipe and joint; tighten the joint. Replace the connectors if necessary.

The indicator light is on, press the up button, the motor rotates and the lifting platform does not rise

Check ≥phase power contact. After the power is reversed, the motor reverses. Just correct the power.

Safety instructions

a. Non-professionals are not allowed to disassemble electrical appliances at will to prevent electric shock or accidental connection.

b. During maintenance under the working platform of the lifting platform, the working platform of the lifting platform must be hung and supported to prevent the lifting platform from falling suddenly, resulting in injury or death.

c. Do not arbitrarily adjust the relief valve. Every element in a hydraulic system works at a specified pressure. After arbitrarily adjusting the relief valve,
May cause abnormal operation of the hydraulic system. There will be unnecessary damage to people, machines and things.

d. Between any part of the hydraulic system, the pressure must be released first to prevent the pressure oil from spraying out and the workbench falling suddenly.

Monthly maintenance

a. Whether the rollers, intermediate shafts and bearings, cylinder pins and bearings, boom hinges and bearings are worn.

b. Fill some parts with lubricating oil to extend bearing life.

c. Oil quality and level of hydraulic oil. The lifting platform is raised all the way. In this position, the hydraulic face should be 40-50 mm higher than the bottom of the box.
The hydraulic oil is darkened, sticky, or foreign matter such as grit, etc., if it is found, it should be replaced in time (32 # hydraulic oil)

Year-end maintenance

a. Check all hydraulic pipes and connections. The pipeline must not be damaged, the joints must not be loose, and all joints must be tightened.

b. Remove and disassemble the drop valve, blow the plunger with compressed air, install it, and reinstall it.

c. Discard all the hydraulic oil, tighten the joint to take out the oil filter. After cleaning, clean it with compressed air, then put it back into the oil tank and connect the pipeline.
(Change to new oil, do not continue to use old oil. Otherwise, moving parts in the system will accelerate wear.)

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Sales Hotline: 0512-66700398
0512-66701892 Fax: 0512-66701891 Switchboard: 0512-66702698 After-sales service: 0512-66702698-8001
Network Services: 0512-66702698-8002 Purchasing Department: 0512-66702698-8003 Contact: Yuan Yongming 13915403158 Email:
Address: Fuxiang Road (No. 6 Fengye East Road), 230 Road Road, Wangting Town, Suzhou City Technical Support: Weilian Network Su ICP No. 12035295