Advanced Hydraulic Jacking System Tank Lifting Machine Tank Construction Machinery

• After-sales Service: Available
• Warranty: 12 Months
• Type: Hydraulic Jack
• Structure: Hydraulic Jack
• Capacity (Load): 12-120 Tons
• Power Source: Hydraulic
• Model NO.: YT-C
• Max Height: 0-4600mm
• Certification: EPA, CS, CE, RoHS, ISO 9001:2000, ISO 9001:2008
• Condition: New
• Transport Package: Wooden Box
• Specification: customized
• Trademark: wincoo
• Origin: China
• Production Capacity: 2000 Sets/Year

Product Description

YB-7.2 type pump station

Maximum work pressure:25MPa(customized)	power:7.5KW
Rated oil flow :7.2L/min	Motor rotate speed:1470r/min
Oil tank capacity:320L	System temperature:20-60ºC
oil filter precision:20υm	Control voltage:220V
System oil type:L-HM46# antiwear hydraulic oil	Total weight:190Kg
Size (mm):750*600*1200	Cylinder quantity controlled by synchronous motor : 4 cylinders

b,LYT-200-2900 type jacking system

Design lifting weight:200.96KN	Rated lifting weight:200KN
Rated pressure:20MPa	Hydraulic moving stroke:1.5 m
Nozzle size:M18*1.5	Lifting height:2.9m
Hydraulic working modle:double action	Hydraulic square:20096mm^2
lifting model:By chain	Fixed type:2 trestles
Size(mm):450*350*2000	Self weight:≤430Kg
Jack basic height:2000mm	lock mode:hydraulic lock

3 pictures

4, Principle of the erection system
The following short description gives the working procedure in outline. It can in certain details be modified when required. Step 1.    The tank bottom - plates are placed on the prepared foundation and welded together.
Step 2.    The beams or lattice work of the roof are assembled and finally joined to the upper rim of the shell ring.
Step 3.    The jacking equipment is installed in the tank. The plates of the second shell ring (next to the top ring) are positioned outside the first one.
Step4.      The completed part of the tank (roof and top shell ring) is lifted hydraulically to a height at which the plates of the second ring can be moved into place and the roof sheeting can be completed.
Step5.      The plates of the second shell ring are located exactly and welded together to the lower edge of the first ring. Step6.      The plates of the third shell ring are placed outside the second shell ring.
Step7.      The completed part of the tank (roof the two uppermost shell rings) is lifted.
Step8.      The above cycle of operations is repeated until the last (bottom) shell ring is finished. Step9.  The entire tank is lowered down to the bottom plate and welded to this.
Step10.    The lifting equipment is dismantled.

5. jacks instruction

1. Outline Drawing of LYT-type Hydraulic Hoist
2. Diagram for Model of LYT-type Hydraulic Hoist
3. Main Purpose and Technical Performance
4. Operation Principles for Lifting by Inverted Method
5. Advantages of Inverted Hydraulic on Improving Large Construction Storage Tank.
6. Storage Tank Manufacturing Steps and Methods for Improving Tooling of Storage Tank
7. Components of the Whole Set of Hydraulic Hoist
8. Procedures for Installation and Commissioning of Hydraulic Hoist
9. Maintenance
10. Common Faults and Troubleshooting
11. Common Wearing Sealing Elements
12. Hydraulic Hoist Diagram
13. Oil Circuit Connection Diagram
14. Procedures for Safety Operation of Hydraulic Lifting Equipment
15. Safety Precautions
16. Company Qualification
17. Example of Construction Site

1. Outline Drawing of LYT-type Hydraulic Hoist

1. Diagram for Model of LYT-type Hydraulic Hoist

1. Main Purpose and Technical Performance

1. Main purpose:

LYT-type hoist is composed of one-stage double-acting hydraulic cylinder, pulley block, load-bearing chain and oil way etc. Moveable pulley is used to enlarge chain stroke, i.e. traveling distance of the cylinder is 1/2 of lifting distance of the chain. It applies to inverted installation and construction of various large storage tanks (steel) and various storage tanks.

1. Technical performance parameters of hydraulic pump station:
2.  

Model of hydraulic pump station	Tank volume	Rated pressure	Rated flow	Power	Control voltage of solenoid valve	Motor drive rate
YB-7.2	220L (700*550*580)	25Mpa	7.2L/min	Three-phase Four-wire (380V)	220V	5.5KW
YB-14.5	340L (750*650*650)	25Mpa	14.5L/min		220V	7.5KW

Technical performance parameters of the hoist:

Mode of LYT-type hoist	Rated lifting capacity (KN)	Hydraulic area (mm)	Rated oil pressure (MPa)	Piston stroke (mm)	Chain stroke (mm)	Cylinder safety equipment	Reinforcement measures
LYT-120-2700	120	11304	25	1500	2700	Double-direction oil-way hydraulic lock	2 adjustable pull rods
LYT-120-2900	120	20096	25	1500	2900	Double-direction oil-way hydraulic lock	2 adjustable pull rods
LYT-200-2700	200	18859.6	25	1500	2700	Double-direction oil-way hydraulic lock	2 adjustable pull rods
LYT-300-2700	300	25434	25	1500	2700	Double-direction oil-way hydraulic lock	2 adjustable pull rod

1. Operation Principles for Lifting by Inverted Method

1. LYT-type hydraulic hoist is used to firstly lift the tank roof and the top (first layer) siding of the tank. It's required to group weld tank siding when the lifting height of siding exceeds the second siding (the second layer from the top) by 30-50mm, and group weld the third layer (the third layer from the top to the bottom) of the tank after lifting again, lift successively, group weld the siding of the tank layer by layer, until the last layer of siding.
2. LYT-type hydraulic hoist is used for lifting. When oil enters the hydraulic jack, the movable pulley is pushed upward by pressing the piston, thus driving the load-bearing chain to lift the expansion ring. In this way, the whole tank (including tank roof) is lifted up, until it reaches the pre-set height (there is a voidance of the next layer of plate). The siding in this layer is surrounded for butt welding. After the positioning block is welded, hydraulic hoist returns and the lift tank falls back to the newly-surrounded siding. After welding of circular seam and vertical seam, the door-type card for fixing expansion ring is cut off and the expansion ring is released. In this way, the hoist returns and expansion ring falls to the bottom of tank siding. Then, the next circular plate is expanded and transfer rib plate, such as door-type card, is welded for lifting, and so forth. The group welded tank is lift, until group weld of the last layer of siding, so that the whole storage tank is installed with this inverted method.

1. Advantages of Inverted Hydraulic on Improving Large Construction Storage Tank.

1. Hydraulic lifting is stable, safe and reliable. Due to the adoption of unified hydraulic control and single or partial (several) adjustment, the whole lifting process is relatively stable. The hoist is provided with synchronizing valve and hydraulic lock to prevent sliding and falling of the tank or heavy loads, which are caused by power failure and fracture of oil tube. Hydraulic lifting is stable, safe and reliable.
2. Construction quality is ensured. As the hoist is provided with synchronizer and adjustable function, lifting height can be controlled accurately. Due to above reasons, quality of the tank is ensured.
3. The equipment is easy to operate. Construction environment is good and work efficiency is high.
4. The equipment is well-adapted. As long as the number of hydraulic hoists is increased or decreased, the whole set of equipment can be applied to the inverted hydraulic lifting construction of large storage tanks with different volumes ranging from several thousand cubic meters to tens of thousands cubic meters.
5. The hydraulic pump station and the hydraulic hoist are placed in the tank for easy operation. Finally, a door-closing plate is reserved to move the equipment out of the storage tank, and the door-closing plate is group welded well.
6. The hydraulic pump station can be controlled singly or jointly, and has strong construction adaptability and excellent technical performance price ratio.
7. Short construction period, low cost and good economic benefit. Due to the high degree of modernization and the fast lifting speed of the complete set of equipment, it has low construction cost and good economic benefit. This technology is truly characterized with convenient and centralized control, simple operation, safety and reliability (no falling), accurate control of weld clearance and lifting height of heavy objects, which can ensure the quality of the project, save labor and reduce costs, and achieve remarkable economic benefits.

1. Storage Tank Manufacturing Steps and Methods for Improving Tooling of Storage Tank

1. Laying of tank bottom plate.
2. Preparation of the top first siding and tank roof.
3. For preparation of expansion ring, 16-25# channel steel is rolled into an arc consistent with the inner arc of the tank by using a rolling machine. The opening of outermost channel steel is rolled toward the tank to form a full circle, and the opening of inner channel steel is rolled toward the outside of the tank to form a full circle. Two channel steels are finally assembled into a mouth-shape. Internal rib plate is welded on the expansion ring in the place of hoist to improve the strength at the lifting point. The expansion ring is cut into several sections according to the length. Several fractures are left to weld out the end face to place the screw jack. According to the length of the expansion ring, every 9 meters (reference value) is a section with one junction plate welded at each end. Expansion ring is connected. According to the whole expansion ring, several fractures are designed to place the screw jack. For remaining fractures, screws are used to connect the junction plate. Fractures of the expansion ring should keep away from lifting position of the hoist and can be produced according to Figure 1 below: (reference diagram for preparation of expansion ring).
4. Two door-type clamps are prepared for each hoist according to Figure 2 below: (reference diagram for preparation of lifting lug and door-type clamp). The door-type clamp is buckled on the expansion ring, and the expansion ring does not need to be welded with the tank wall. The expansion ring is only expanded on the tank wall with screw jack. The upper and lower sides of the door-type clamp are welded on the tank wall. During lifting, the expansion ring transmits force to the door-type clamp and then to the tank wall.
5. The expansion ring is clamped on the tank wall. The distance between lower plane of expansion ring and the lower plane of tank siding is about 100-150 mm. If the expansion ring is set too high, the lifting height of the hoist will be affected.
6. According to the number of hoists, hoisting points with same quantity of the hoists should be evenly arranged on the expansion ring to weld lifting lug of the hoist. Each lifting lug (composed of two ear plates and two rib plates) is welded for each hoist and prepared by reference to Figure 2 below: (reference diagram for preparation of lifting lug and door-type clamp).
7. Hoist and hydraulic pump station are installed. Oil way and circuit are connected and exhausted for commissioning.
8. Lifting tank - coaming - welding vertical seam - falling tank - welding circular seam - falling expansion ring - preparation for lifting the next layer of siding.

1. Components of the Whole Set of Hydraulic Hoist

The LYT-type hydraulic hoist is composed of several groups of hydraulic hoists. One YB-type hydraulic pump station supplies oil synchronously for four LYT-type hydraulic hoists. Several groups of LYT-type hydraulic hoists constitute a complete set of inverted hydraulic hoist.

1. Procedures for Installation and Commissioning of Hydraulic Hoist

1. The hydraulic hoists of a whole set of LYT-type hydraulic hoist are evenly distributed at the circumference of inner wall of the storage tank, and the chain is vertically sagged at the center width of expansion ring. The verticality of the hoist is measured, and the hoist is fixed on the tank bottom plate with 7-shaped presser feet. Each hoist is connected with the tank bottom plate in a figure of eight-shape towards the tank center by using two adjustable pull rods, thus forming a stable triangular structure. The verticality of the cylinder is adjusted.
2. Two ear plates are welded as lifting lug at the corresponding expansion ring of the cylinder chain, which is connected with the junction plate of the chain with the hinge pin. Nut of hinge pin is tightened. All LYT-type hydraulic hoists are successively installed in place according to the above steps.
3. Hydraulic station is 2-3m from the tank wall. One hydraulic station can enable four hoists. One hydraulic pump station is placed in the center of every four hoists. Hydraulic pump station and corresponding hoists are arranged in place.
4. The pump station is connected with the hoist cylinder by oil pipe. Oil nozzle on the cylinder and the end groove of the inlet and outlet nozzles on the pump station are greased. O-ring with a diameter ofφ12*1.9 is placed in the end groove of oil nozzle and compacted. Four outlet oil nozzles of synchronizing valve of pump station are corresponding with lower oil nozzles on hydraulic lock of four hoist cylinders, which are respectively connected and tightened by oil pipes. Four return oil nozzles of hydraulic pump station are corresponding with upper oil nozzles on hydraulic lock of four hoist cylinders, which are respectively connected and tightened by oil pipes. All oil pipes are connected and installed in place according to above steps. (Note: O-ring on the oil nozzle shouldn't fall off)
5. The oil filling port (air filter) of the hydraulic pump station is opened to fill the fuel tank with hydraulic oil through the oil filter. The hydraulic oil should be a model commonly used in the place. It is better to select the same brand and the same model for all pump stations of this set of equipment. It's required to try to avoid mixing hydraulic oil with different brands and models. The oil level should not be lower than the center of the level gauge.
6. If the power supply of the hydraulic pump station is 380V-50HZ, it requires 4-core cable, with one connecting to the neutral line (N-interface on the electric box of pump station) and three connecting to live lines (ABC interfaces on the electric box of pump station), (if the power is 220V-60HZ, only three 220V power supply needs to be connected). After power-on, the power indicator light is ON, (the motor isn't started) and the up/down knob is turned on. When the indicator lights on both sides of the solenoid valve are lighted normally, the up/down knob is turned to the middle stop position, and the handle of the overflow valve is released to the left and loosened to reduce system pressure. If the handle of overflow valve is turned to the right to the end, it is easy to cause failure of overflow valve, causing detonation of cylinder or oil pipe when the pressure of hydraulic system is too high.
7. If there is an emergency stop switch on the electric box of the pump station, it should be rotated to the right to turn on emergency stop switch. If there is no emergency stop switch, it can be omitted. It's required to successively press the start button and the stop button to observe the rotation direction of the motor. When looking down from the cover of the fan, the right rotation of motor blade is correct; if not, it's required to adjust to the correct rotation direction. All hydraulic pump stations are successively commissioned according to above method.
8. Joint control lines of all pump stations (general control line for ascending/descending) are connected with the main control box. The main control box is connected with 220 V two-phase power supplies (one 220 V live line + one zero line). The control knob of main control box can be used to control the rise and fall of all hydraulic pump stations, i.e. it can control the unified rising, stopping and falling of all hoists, The up/down knob of a single hydraulic pump station can be used to only control four hoists driven by this pump station; for the time being, it is not necessary to start all the pump station motors and it's necessary to firstly power on the two power supplies of the main control box, turn the master control switch to the up position, and inspect all solenoid valve indicator lights, and determine whether the lighted indicator lights are on the same side of pump station. If not, two indicator lights on the solenoid valve can be mutually changed and the master control switch is turned to the down position. If all indicator lights on the other side of the solenoid valve are ON correctly, the master switch is turned to the stop position in the middle. (Note: the orientation of the up/down button can be set according to personal habits by changing the position of the electromagnetic plug on the solenoid valve, so as to ensure that the oil cylinder can rise when it rises, and avoid the phenomenon that the cylinder rises and falls at the same time during the linkage of master control).
9. The hoist chain is firstly pulled to the pull plate of the chain. Chain isn't driven temporarily during commissioning, as chain in the upper place may slide to the internal side of the cylinder when there is no heavy object below the chain.
10. Firstly, four outlet valves of the synchronizing valve of the hydraulic pump station are closed. When the motor is started and rotated normally, knob on the pump station is turned to the rising position and handle of overflow valve is slowly screwed to the right. When system pressure is 5MPa, the knob is screwed to the neutral position for standby. Then, it's necessary to open four outlet valves on synchronizing valve of pump station (until it's turned to the end of left). All hydraulic pump stations are operated as above. After pressure adjustment of hydraulic pump station and determination that all oil pumps are enabled and up/down knobs on the pump station are neutral, master linkage knob is screwed to the up position. After that all cylinders are up to the topmost, master linkage knob is screwed to the down position and enable the cylinder to the bottom. All cylinders are up to the topmost and down to the bottom for 4-5 times, air in the cylinder and pipeline should be taken back to fuel tank and discharge the air in the whole oil way system. During the process, the piston of the cylinder moves with a stroke, which is caused by air in the cylinder. If air the cylinder is discharged completely, such phenomenon can be eliminated. If the synchronization error of the cylinder is large, the reason is that the air in the cylinder has not been discharged completely. It's necessary to repeat the up/down action for several times and keep the total stroke error within the range of 50 mm, which can be basically eliminated after loading. After air in the cylinder is exhausted, the piston is turned to the lowest end and linkage button is turned to the neutral stop position.
11. It's necessary to turn the knob on the hydraulic pump station to the down position, turn the handle of the overflow valve to the right slowly, adjust the pressure to 25MPa, and tighten the lock nut on the handle of the overflow valve. All hydraulic pump stations are successively operated as above. After the pressure is adjusted to 25MPa, the pump is shut down for lifting.
12. All hoist chains are installed on the previous position and the chain and expansion ring are reconnected. After checking that all hoists are connected with the expansion ring. After all the hoists are connected with the expansion ring, the preparatory work is completed and the preparation for lifting is started.
13. All pump stations are started and the master control knob is turned to the up position for lifting. During lifting, the force and synchronization of the hoist should be closely observed. If the error is too large, it's necessary to stop the master control, and timely adjust the lifting height by the single control on the pump station. After adjustment, it's necessary to continue to lift through master control, until it reaches the specified height. If there is any error in the height, the height of the siding should be adjusted through single control of pump station, until the height is consistent.
14. The baffle plate for coaming should be welded on the lift siding. All sidings are surrounded. After welding of fixed baffle plate in the whole circle, it's necessary to weld (broken welding firstly) vertical seam and weld internal and external circular seam and vertical seam from the siding raised after falling to surrounded siding.
15. After cutting off the door-type clamp, loosening the screw jack, and enabling the expansion ring and tank wall to bear no force, the hoist is used to lower the expansion ring to the end of the siding.
16. It's necessary to fix expansion ring, weld door-type clamp, and prepare to lift the next layer of siding.

1. Maintenance

1. The oil level of the fuel tank in the hydraulic pump station is kept at the upper position of the level gauge after return of all pistons of the hoist. As the piping and the hydraulic cylinder have large volume cavity, enough hydraulic oil is needed. After startup, as hydraulic oil enters the pipeline and the hydraulic cylinder, the liquid level will drop, and even that the filter will expose the liquid level. As there is inevitable lose of hydraulic oil during use, it's necessary to frequently observe oil level in the level gauge and timely replenish the oil (oil level should be kept at the upper position of the level gauge after full return of hydraulic cylinder);
2. The hydraulic oil should always be kept clean and filled by oil filter truck at filter accuracy of less than 30υm; during normal operation, hydraulic oil should be replaced at a cycle of one year. Replaced hydraulic oil should be treated in a environmental way to prevent environmental pollution;
3. During replacement of hydraulic oil, oil in the fuel tank should be exhausted and new oil is filled in the fuel tank after cleaning at filter accuracy of no less than filter accuracy of the system. Oil liquid volume in the fuel tank should be kept within the upper range of the level gauge;
4. The oil temperature should be appropriate. The oil temperature in the oil tank should not exceed 60ºC. In case of abnormal increase, inspection is required. During startup of hydraulic pump in winter, sequence action can be made after the oil temperature reaches 15ºC;
5. Attention should be paid to the followings during first start-up of hydraulic pump:
   1. The hydraulic oil level in the oil tank should be at the top of the level gauge;
   2. Rotation direction of the motor is inspected. If seen from the fan tail of the motor to the oil pump, the rotation is clockwise (i.e. the shear direction). If the opposite direction is found, the motor must be stopped immediately and proceeds after adjustment;
   3. The pump station should be operated for about 10 minutes without load before lifting;
6. When the hydraulic pump is started, the up/down knob should be in the neutral stop position and hydraulic pump station shouldn't be started with pressure;
7. Quick-wear parts (such as sealing rings, electrical appliances, etc.) should have spare parts for timely replacement;
8. The set pressure of overflow valve should not exceed the maximum pressure of hydraulic system, i.e. 25MPa;
9. Before construction, it's necessary to check the hoist, determine whether hydraulic part has oil leakage, oil the chain and pulley block for lubrication, and confirm that whether parts have good connection performance, the chain has no substantial damage, and the complete machine is in good condition;
10. During connection of the hydraulic hose, mud and sand are strictly forbidden to enter to avoid damaging the hydraulic system and jack;
11. Working under overpressure (overload) is prohibited;
12. Lifting height should exceed coaming height by 20-50mm;
13. Hydraulic oil used by hydraulic system should be L-HM46 anti-wear hydraulic oil according to actual ambient temperature, without mixing hydraulic oil with different labels. Low temperature hydraulic oil should be used when the temperature is less than -10ºC;
14. The hoist should be timely cleaned and maintained in time after completion of the project. Especially, it's required to clear attachments on the top of the piston, and timely inject lubricating oil into chain and pulley block for maintenance. Replaced hoist should be timely repaired;
15. During non-use, the equipment should be placed in the warehouse to avoid light, dust, rain and snow. The hoist should be placed vertically, or provided with plastic cloth for guarding against damp, if conditional;
16. Daily inspection items and contents

Inspection time	Inspection item	Contents
Working state is monitored during operation.	Pressure	Whether system pressure is stable and within the specified range.
	Noise vibration	Abnormal or not
	Oil temperature	Whether it is within 15-60ºC, not more than 60ºC.
	Voltage	Whether it's in the range of 105%-85% of rated voltage.
	Oil leakage	Whether the whole system has oil leakage
Inspect before startup	Oil level	Whether it's on the red line of level gauge.
	Overflow valve	Whether overflow valve is commissioned well.
	Earth wire	Whether earth wire is installed in the pump station.
Regular inspection item and contents	Hinge pin and pipe joint	Regular fastening; it's required to inspect before use.
	Oil filter and air filter	Regular inspection; it's required to inspect before use.
	Pipeline valve plate of fuel tank	Regular inspection; it's required to remove and replace the seal during overhaul.
	Sealing elements	It's generally replaced once every 2-3 years according to working conditions and temperature.
	Chain	It should be timely replaced according to working conditions, wearing degree or damage.
	Inspection of hydraulic oil pollution	New hydraulic oil is tested after 1000 hours of use.
		Sample should be taken with a special container to avoid contamination.
		Red oil, in use, should be sampled, rather than static oil.
		Sampling quantity is 300-500ml/time.
		It should be tested according to laboratory sheet of oil plants and test results are included in the equipment file.
	Pressure gauge	Inspection period is specified according to use conditions of the equipment.
	High-pressure hose	Replacement period is specified according to service conditions.
	Hydraulic element	Performance of pump and valve and others should be tested according to service conditions.

1. Common Faults and Troubleshooting

Faults	Possible causes	Treatment
The hoist can't be lift or lifting stroke is not in place.	Piston rod has local deformation or inclination.	Piston rod or correct the hoist is replaced.
	Upper and lower oil ways are connected incorrectly.	Oil ways are connected as specified.
	Piston seal of the cylinder is damaged.	The damaged sealing ring is replaced
	Oil supply pressure is insufficient.	Working pressure of oil pump is adjusted.
	Overload	Measures are taken to reduce load or increase quantity of the hoist.
Hoist cylinder has oil impregnate or leakage.	Sealing elements are damaged or worn out or have aging failure.	Corresponding sealing elements are replaced.
	The cylinder block and piston have drawing marks.	The cylinder block and piston are repaired or replaced.
	The connection is loose or sealing elements are damaged.	Thread at connection part is tightened or sealing elements in the corresponding part are replaced.
Oil pipe joint has oil leakage.	The joint or O-ring is damaged.	The joint or corresponding O-ring is replaced.
Don't increase the pressure.	The motor is reversed.	Correct steering of the motor is adjusted.
	Solenoid valve doesn't work.	It's required to inspect solenoid valve and replace new solenoid valve.
	Whether oil level of fuel tank is too low.	It's required to add sufficient hydraulic oil to exceed center line of oil mark.
	Oil pump is seriously damaged or worn.	Oil pump is replaced.
	Overflow valve is blocked.	Overflow valve is cleaned or replaced.

1. Common Wearing Sealing Elements

1. Mode of hoist seal

Hoist mode	Piston seal	Cylinder head seal
LYT-120-2700	Sealing ring YX120/108/14=2 PCS PTFE retaining ring φ120/φ108/2=2 PCS Guide ring φ120/φ115/15=2 PCS O-ring φ60*5.7=2 PCS	Dust ring CK80/93.6/11/6=1 PCS Guide ring φ80/φ85/10=2 PCS Sealing ring YX80/92/14=1 PCS Axis step seal FZJ80/95.5/6.3=1 PCS O-ring φ120*5.7=1 PCS
LYT-200-2700	Sealing ring YX155/143/14=2 PCS PTFE retaining ring φ155/φ143/2=2 PCS Guide ring φ155/φ150/15=2 PCS O-ring φ80*5.7=2 PCS	Dust ring CK115/130.4/13/7=1 PCS Guide ring φ115/φ120/10=2 PCS Sealing ring YX115/127/14=1 PCS Axis step seal FZJ115/130.5/6.3=1 PCS O-ring φ155*5.7=1 PCS
LYT-300-2700	Sealing ring YX180/164/18=2 PCS PTFE retaining ring φ180/φ164/2=2 PCS Guide ring φ180/φ175/15=2 PCS O-ring φ80*5.7=2 PCS	Dust ring CK140/159.4/13/7=1 PCS Guide ring φ140/φ145/10=2 PCS Sealing ring YX140/152/14=1 PCS Axis step seal FZJ140/155.5/6.3=1 PCS O-ring φ180*5.7=1 PCS

1. Model of oil way seal

Part used	Model
O-ring at oil pipe joint	φ12*1.9
O-ring at core of needle valve	φ10*1.9
O-ring at cover of needle valve	φ18*2.4

1. Hydraulic hoist should be operated by a full-time operator; 2-3 people must inspect the working state of each hoist, and timely stop the machine for inspection in case of abnormal conditions;
2. The hydraulic pump station must be equipped with earth wire and the fuel tank must be filled;
3. After startup of the motor, it's required to observe whether the motor rotates in the right rotation direction of the motor fan; the hoist is oiled after normal startup of the motor; air in the oil pressure system should be exhausted before hoisting of the tank;
4. The rated pressure of the hydraulic system is 20-25mpa, and the value shown by pressure gauge of the hydraulic pump station should not exceed 25MPa;
5. The hoist must be vertical to the horizontal plane, and diagonal support must be reinforced;
6. Before lifting, chain state should be checked to avoid sloughing, serious inclination or poor perpendicularity; lock nut of hinge pin is tightened to prevent removal of hinge pin;
7. The door-type card fastened on the expansion ring must be firmly welded with the tank wall, and the lifting point must be welded firmly. The reinforcement measures should be taken to prevent deformation of expansion ring;
8. The pressure should be increased slowly during adjustment of the pressure;
9. System pressure can reach 28Mpa in a short time, but it cannot work for a long time to avoid damaging the hydraulic system;
10. It is forbidden to crush the high-pressure oil pipe by hard objects to avoid the burn by welding slag. The high-pressure oil pipe, if damaged, should be replaced in time;
11. During replacement of system components, the pressure in the system should be released firstly;
12. During docking of ring seam, all positioning plates should be firmly welded, otherwise it may cause failure in falling-off of but joint;
13. Work under overpressure is prohibited;
14. Safety Precautions

1. The equipment can only be used for the specified purpose and range.
2. Before using this equipment, please carefully read the instructions.
3. Users must give professional training for the operators and enable them to have required operation qualifications, so as to avoid hurting the people and damaging the equipment.
4. The operator must operate according to the training and instructions, and regularly maintain the equipment to provide conditions for safe operation.
5. The operator must operate the machine under the safe condition, and often check their integrity. It is strictly forbidden to arbitrarily remove accessories on the equipment.
6. During removal and replacement of accessories, it's required to remove and replace the accessories after confirming that the equipment has been stopped or there is no pressure.
7. All preparation work must be ready before equipment operation.
8. Before adjustment, repairing and maintenance of the equipment, especially before electrical inspection, the main power must be cut off to prevent accidental electric shock.
9. The power of hydraulic pump station is three-phase four-wire and at a voltage of 380V; control voltage is 220V; Separate power supply, grounding and leakage protection devices should be set according to the rated capacity of the equipment. It is strictly forbidden to share wiring with equipment that may cause voltage fluctuation and misoperation.
10. In case of emergency, please press the stop button.
11. The operator should focus on protection when cleaning and replacing the hydraulic oil in the hydraulic pump station. The waste oil should be treated according to the environmental protection regulations, rather than pouring into the ground directly.
12. No fireworks are allowed in the working area of the equipment, and corresponding fire control measures should be taken