Wesco MELT User manual

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TABLE OF CONTENTS
1 General Information ............................................................................................................... 2
1.1 Description..................................................................................................................... 2
1.2 Specifications.................................................................................................................2
2 Safety Information..................................................................................................................... 2
3 Pre-Operation Procedures.....………........................................................................................ 2
3.1 Inspection....................................................................................................................... 3
3.2 Bolting Down the Lift Table.............................................................................................3
4 Operation.................................................................................................................................. 3
4.1 Lifting the Table.............................................................................................................. 3
4.2 Lowering the Table......................................................................................................... 3
4.3 Emergency Stop............................................................................................................. 3
4.4 Transportation.................................................................................................................3
5 Hydraulic Circuit & Electric Principle Diagrams.........................................................................4
6 Maintenance..............................................................................................................................5
6.1 Routine Maintenance...................................................................................................... 5
7 Trouble Shooting.......................................................................................................................6
8 General Assembly Part Information.......................................................................................... 7
8.1 General Assembly Part Diagram.................................................................................... 7
8.2 General Assembly Part List............................................................................................ 8
9 Electric Box Part Information.....................................................................................................9
9.1 Electric Box Part Diagram...............................................................................................9
9.2 Electric Box Part List.......................................................................................................9
WESCOINDUSTRIALPRODUCTS,INC

InstructionManual
PoweredScissorsLiftTable
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PartNumber: 270662

Note: Operator MUST read and understand these operating instructions before using
this Powered Scissors Lift Table.

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Powered Scissors Lift Table
(Part # 270662)
Instruction Manual
ATTENTION: TO INSURE SAFE AND EASY USE OF YOUR POWERED LIFT TABLE,
READ THESE INSTRUCTIONS ENTIRELY BEFORE USING.
1. GENERAL INFORMATION
1.1 DESCRIPTION
Thank you for purchasing a Powered Scissor Lift Table. These lift tables are heavy duty to
handle tough loads, yet small and light enough to move. It features a perimeter toe guard, push button
station and a 2,200 lb capacity.
1.2 SPECIFICATIONS
Part Number 270662
Model MELT
Capacity (lbs) 2,200 lbs
Collapsed Height (in) 7”
Max. Bearing Height (in) 30.3”
Table Length 36”
Table Width 24”
Table Thickness .2”
Approximate Lifting Time while Loaded 15-20 sec
Motor
Output 1,100 W
Voltage 400 V
Revolution 1,400 r/min
Protection Class IP.54
Insulation Class F.
Net Weight 253 lbs
Materials and specifications are subject to change without notice.
2. SAFETY INFORMATION
1) The lift table is a movable lifter designed to lift or lower rated loads. Do not use it for other purpose.
2) Only trained and authorized personnel should be permitted to operate this machine.
3) Check all safety devices before operation.
4) Always do maintenance and routine checks while the lift table is unloaded.
5) Do not insert hands or feet in the scissors mechanism or through the frame.
6) Do not overload the lift table beyond the rated capacity. The load should be distributed on the table
evenly.
7) Note if local voltage and frequency are the same as the input specification of the lift table
8) Use the lift table on flat and solid ground.
9) Do not contact the moving parts of the lift table during operation.
10) While the lift table moving, it is forbidden to adjust or to move the load.
11) Do not operate the lift table while a person is under the table.
12) Do not adjust the safety valve of hydraulic power pack.
13) Do not operate the lift table if there is even a small structural distortion
14) It is forbidden to change the lift table without manufacturer’s written admission.
15) It is necessary to use the spare parts designated by manufacturer.
16) Keep the hydraulic system under clean and safe condition.
17) The hydraulic power pack features an electric lowering control. The coils must be fed with the required
voltage as described on those coils. The power supply voltage should not exceed ±10% of the rated
required voltage.

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Powered Scissors Lift Table
(Part # 270662)
Instruction Manual
ATTENTION: TO INSURE SAFE AND EASY USE OF YOUR POWERED LIFT TABLE,
READ THESE INSTRUCTIONS ENTIRELY BEFORE USING.
3. PRE-OPERATION PROCEDURES
3.1 INSPECTION
The operator should perform a visual inspection prior to each work shift to discover if anything is wrong
Daily inspection is effective to find the malfunction or fault on the lift table. Before operation, check the
lift table according to the following points:
CAUTION! Do not use the lift table if any malfunction or fault is found.
Check all the terms of WARNING and CAUTION.
Check for scratches, bending or crack on the lift table.
Check for smooth movement of the table.
Check if there is any hydraulic oil leakage.
Check the vertical creep of the table.
Check if all the bolts and nuts are firmly tightened.
3.2 BOLTING DOWN THE LIFT TABLE
The Powered Scissors Lift Table must be fixed to the floor/ground by means of expander bolts
are securely affixed on the floor to prevent unintentional movement.
4. OPERATION
4.1 LIFTING THE TABLE
CAUTION! Do not overload the lift table.
1) Ensure the load is balanced. Do not load partially or concentrically.
2) Screw and loose emergency stop switch.
3) Push the “UP” button and the power pack starts to work to lift the load.
4) Release the “UP” button and the power pack stops working.
4.2 LOWERING THE TABLE
WARNING! Do not put foot or hand in scissors mechanism.
1) Push the “DOWN” button and the table will lower.
2) Release the “DOWN” button and the table will stop.
NOTE: The table is equipped with an aluminum guard to avoid accidental danger. If the aluminum
guard strikes an object while the table is lowering, stop operation and check the lift table. After making
sure no abnormality has occurred, strike the “UP” button slightly and then the electric system will
resume functioning.
4.3 EMERGENCY STOP
There are two methods of emergency stopping as follow:
1) Push down the emergency stop switch and the table will stop moving.
2) Strike the aluminum guard upward and the table will stop moving.
4.4 TRANSPORTATION
1) If necessary, the lift table can be transported with attached ringbolts.
2) Pay attention to the maximum capacity of lifting equipment to be used.
Figure 1

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Powered Scissors Lift Table
(Part # 270662)
Instruction Manual
ATTENTION: TO INSURE SAFE AND EASY USE OF YOUR POWERED LIFT TABLE,
READ THESE INSTRUCTIONS ENTIRELY BEFORE USING.
5. HYDRAULIC CIRCUIT & ELECTRIC PRINCIPLE DIAGRAM
5.1 Hydraulic Circuit Diagram
Figure 2
5.2 Electric Principle Diagram
Figure 3

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Powered Scissors Lift Table
(Part # 270662)
Instruction Manual
ATTENTION: TO INSURE SAFE AND EASY USE OF YOUR POWERED LIFT TABLE,
READ THESE INSTRUCTIONS ENTIRELY BEFORE USING.
6. MAINTENANCE
Any maintenance or repair shall be carried out by a trained qualified mechanic. Before servicing the lift
table, make sure to turn off the AC power supply. After service it is necessary to check the function of the lift
table again.
5.1 Routine Maintenance
Do routine checks/maintenance of the following:
Fasteners, packing and oil leaking.
Function of the lift table.
Micro-switches on the safety guard.
Oil filter, clear or even replace after operating for a long time
Lubrication levels, determining if they are adequate to allow the lift table to work smoothly and have a
prolonged service life.
Routine maintenance of the machine will prolong its working life. For the frequency of maintenance please
refer to the table below.
Inspection Content Monthly Yearly
Check oil level of oil tank ●
Check cleanliness of the oil filter ●
Fasten all the connecting parts again ●
Check wear and tear of pressure oil pipes ●
Check hydraulic cylinder ●
Affix main parts tightly again ●
Check the function of micro-switches ●
Check overall working state of the lift table ●
Lubricate all the joints and pivot points ●
Check wear and tear of all axial bushes ●
Replace hydraulic oil for the first time Accumulated 10 working hours
Replace hydraulic oil ●
Check for leaking oil ●
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Powered Scissors Lift Table
(Part # 270662)
Instruction Manual
ATTENTION: TO INSURE SAFE AND EASY USE OF YOUR POWERED LIFT TABLE,
READ THESE INSTRUCTIONS ENTIRELY BEFORE USING.
7. TROUBLE SHOOTING
No Problem Causes Solutions
1
Table cannot lift while
motor is working
normally
- AC voltage phase mistake.
- Electromagnetic malfunctions.
- The table is overloaded
- Check AC voltage phase.
- Check the function of electromagnetic
valve and repair it
- Remove excessive load
2 Table cannot lift and
motor is not working
- Lowering limit switch damaged - Replace limit switch
3 Table cannot lower
- Lowering limit switch or micro-
switch on safety guard damaged.
- Electromagnetic valve
malfunctions.
- Safety guard works.
- Electric circuit board is
malfunctioning
- Replace lowering limit switch or
micro-switch.
- Check the function of electromagnetic
valve and repair it.
- Strike the “UP” button slightly
- Replace electric circuit board
4
Table’s legs go over
limit position (if
existed) while table
lowers
- Internal leaking in
electromagnetic valve
- Packing damaged in hydraulic
cylinder
- Repair electromagnetic valve and if
necessary replace it
- Check and replace packing
Table cannot reach
the highest position
- Not enough oil
- Limit switch damaged
- Refill Oil
- Check and repair limit switch. If
necessary, replace it.
NOTE: DO NOT ATTEMPT TO REPAIR THE POWERED LIFT TABLE UNLESS YOU ARE
TRAINED AND AUTHORIZED TO DO SO.
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Powered Scissors Lift Table
(Part # 270662)
Instruction Manual
ATTENTION: TO INSURE SAFE AND EASY USE OF YOUR POWERED LIFT TABLE,
READ THESE INSTRUCTIONS ENTIRELY BEFORE USING.
8. GENERAL ASSEMBLY PART INFORMATION
8.1 GENERAL ASSEMBLY PART DIAGRAM

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Powered Scissors Lift Table
(Part # 270662)
Instruction Manual
ATTENTION: TO INSURE SAFE AND EASY USE OF YOUR POWERED LIFT TABLE,
READ THESE INSTRUCTIONS ENTIRELY BEFORE USING.
8. GENERAL ASSEMBLY PART INFORMATION
8.2 GENERAL ASSEMBLY PART LIST
Item Part Number Item Description Qty. Item Part Number Item Description Qty.
1 Grease Cup M6 1
43 Bolt M4 x 16 2
2 Bearing GE25ZS 1
44 Spring Washer 4 2
3 Piston Rod 1
45 Washer 4 2
4 Retaining Ring φ75 1
46 Electric Box 1
5 Cylinder Cover 1
47 Pump Back Base 1
6 Seal Cover 1
48 High Pressure Hose Set 1
7 Snap Ring φ80 1
49 270687 Switch Wire 1 Set
8 O-Ring φ75 x 2.65 1 50 270689 Plug 1
9 O-Ring φ25 x 2.65 1 51 270688 Socket 1
10 Piston 1
52 Rubber Bush 1
11 Seal Ring 80x60x22.3 1 53 Plastic Joint 1
12 Snap Ring φ25 1
54 Power-Unit Cover 1
13 Cylinder 1
55 Chassis 1
14 Hose Break Valve 1 56 Bolt M8 x 16 6
15 Seal Ring 16 1 57 Pin 1
16 Split Pin 4 x 35 1 58 Bushing φ28x φ25x20 2
17 Bolt M3 x 10 8
59 Bolt M8 x 45 4
18 Spring Washer 3 4
60 Bushing 4
19 Washer 3 4
61 Locknut M8 8
20 Control Switch 1
62 Internal Scissors 1
21 Support 1
63 External Scissors 1
22 Plug 1 Set
64 Washer 1
23 Label 1
65 Hex Socket Bolt M6 x 20 2
24 Connector Lug φ6-4 1
66 Pin 1
25 Indicator φ6 1
67 Locknut M14 2
26 Washer 6 4
68 Prop 2
27 Spring Washer 6 4
69 Bushing 2
28 Bolt M6 x 12 4
70 Washer 14 2
29 Rubber Bush 1
71 Bolt M14 x 45 2
30 Hex Socket Bolt M8 x 20 2 72 Roller 4
31 Spring Washer 8 8
73 Washer 8 4
32 Washer 8 2
74 Bolt M4 x 12 4
33 Joint 1
75 Fixed-Board 4
34 Seal Ring 14 2 76 Nut M4 4
35 Hydraulic Power Pack 1
77 270690 Safety Switch 2
36 Washer 10 2
78 Safety Frame 2
37 Spring Washer 10 2
79 Table 1
38 Hex Socket Bolt M10 x 20 2 80 Fixed-Board 4
39 High Pressure Hose 1 81 Connected-Board 4
40 Nylon Seal 2
82 Safety frame 2
41 Ball Valve 1 Set 83 Spring 4
42 High Pressure Hose 1 84 Buffer-Board 4
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Powered Scissors Lift Table
(Part # 270662)
Instruction Manual
ATTENTION: TO INSURE SAFE AND EASY USE OF YOUR POWERED LIFT TABLE,
READ THESE INSTRUCTIONS ENTIRELY BEFORE USING.
9. ELECTRIC BOX PART INFORMATION
9.1 ELECTRIC BOX PART DIAGRAM
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9.2 ELECTRIC BOX PART DIAGRAM
Item Part Number Item Description Qty. Item Part Number Item Description Qty.
46 Electric Box 1
46-9 Support 1
46-1 Screw 6
46-10 Switch 1
46-2 Cover 1
46-11 Board 1
46-3 Box 1
46-12 Plastic Joint 5 Set
46-4 Screw M4 x 10 13 46-13 Transformer 1
46-5 Spring Washer 4 13
46-14 Plug for Fuse 1
46-6 Washer 4 13
46-15 Fuse 1
46-7 Nut M4 2
46-16 Socket for Fuse 1
46-8 Connection Block Plate 1