Vestil EHU-2 User manual

INSTRUCTION MANUAL
EHU-2 & EHU-3
VESTIL MANUFACTURING CORP.
2999 NORTH WAYNE STREET, P.O. BOX 507, ANGOLA, IN 46703
TELEPHONE: [phone] -OR- TOLL FREE [phone]
FAX: [phone]
URL: WWW.VESTILMFG.COM EMAIL: [e-mail]

THANK YOU VERY MUCH FOR SELECTING OUR PRODUCT. THIS
INSTRUCTION MANUAL DESCRIBES CORRECT OPERATING METHOD TO
ENSURE PROLONGED SERVICE LIFE. PLEASE READ AND COMPLETELY
UNDERSTAND THIS MANUAL BEFORE OPERATING THE LOW PROFILE
LIFT TABLE. ALWAYS KEEP THIS MANUAL AT AN APPROPRIATE PLACE. IF
THE MANUAL OR WARNING DECAL IS MISSING, PLEASE CONTACT WITH
DEALER.
Note: This manual has been prepared for skilled and competent personal. It provides instructions for
using the product correctly and parts list. This Manual cannot replace the professional skills and
expertise of the user.
1. WARNING! If operating the lift table improperly, a
person may be seriously! Injured. Therefore, operate
properly according to the following instruction
◇ Read & thoroughly understand the instruction manual completely before using. Follow all
safety instructions strictly.
◇ It is necessary to check all safety devices before operation.
◇ Make sure that there are no obstacles in the working area.
◇ Do not put foot or hand in scissors mechanism or through frame.
◇ Screw the lifting eyes on the base frame before working on the lift table.
◇ Do not overload the lift table. Load should be distributed on the table according to relevant
load distribution chart.
◇ Pay attention if local voltage and frequency is as same as the input specification of the lift
table.
◇ Use the lift table on flat and solid ground.
◇ All the electrical connection and disconnection operations must be carried out by skilled
and competent personal.
◇ While operation, it is forbidden to contact the moving parts of the lift table.
◇ While the lift table moving, it is forbidden to adjust or to move the load
◇ It is forbidden to lift the load, which perhaps does harm to a person or other object.

◇ It is forbidden to operate the lift table while a person is under the table.
◇ Do not adjust the safety valve of hydraulic power pack.
◇ It is forbidden to operate the lift table even if there is underf the table.
◇ Do not adjust the safety valve of hydraulic power pack.
◇ It is forbidden to operate the lift table even if there is small structure distortion.
◇ Do not use in an explosive or flammable place.
2. CAUTION! Operating the lift table improperly can cause
accident. Operate properly according to the following instruction.
◇ The lift table is just for raise and lower purpose. Do not use it for any other purpose.
◇ Do not allow a person to operate the lift table, who does not understand its operation.
◇ It is forbidden to change the lift table without manufacture’s written admission.
◇ It is necessary to use the spare parts designated by manufacturer.
◇ Make sure to keep a distance between the table and ambient objects enough to operate the
lift table safety.
◇ Keep the hydraulic system under clean and safe condition.
◇ The hydraulic power pack features an electric lowering control those coils. The coils must
be fed with the power supply voltage should not exceed + 10% of the rated required
voltage.
◇ Always do maintenance and routine check while the lift table is unloaded.
◇ The lift table is not waterproof and should be used in a dry environment.

3. DAILY INSPECTION
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 scratches, bending or crack on the lift table.
◇ Check 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.
4. Operating the lift table
■LOADING
The maximum capacity of the lift table is 2,000/3,000 lbs load should be distributed on the
lift table equably.
■ Lifting the Table
CAUTION! Do not overload the lift table. Ensure the
balance of loading. Do not load partially or
concentrically
◇ Screw and loose emergency stop switch.
◇ Push the UP button and power pack starts to work to lift the load.

◇ Loose the UP button and power pack stops working.
■Lowering the Table
WARNING! Do not put foot or hand in scissors mechanism.
◇ Push the DOWN button and the table will lower.
◇ Loose the DOWN button and the table will stop.
NOTE
◇ The table is equipped with an aluminum guard to avoid accidental danger.
◇ If aluminum guard strikes an object while the table lowers, stop operation and check the lift
table. After making sure no any abnormality, strike the UP button slightly and then the
electric system will function as before.
◇ Emergency stop
◇There are two methods of emergency stop as follows.
◇ Push down the emergency stop switch and the movement of table stops.
◇ Strike aluminum guard upward and the movement of table also stops.
■ Transportation
If necessary, the lift table can be transported with attached ringbolts.
◇ Pay attention to the maximum capacity of lifting equipment to be used.
◇Keep the ringbolts with reasonableness.

5. HYDRAULIC CIRCUIT & ELECTRIC
PRINCIPLE DIAGRAM
See Figure 1 & Figure 2

Fig. 1 Hydraulic circuit

Fig. 2 Electric Principle Diagram
6. Specification
Model EHU-2 EHU-3
Capacity (lbs) 2,000 3,000
Min. Height (inch) 3½ 4¼
Max. Height (inch) 33½ 33½
Platform Outside Dimensions Law (inch) 55¾ x 52¾ 63 x 53½
Platform Inside Dimensions LxW (inch) 41¼ x 29⅞ 44¼ x 29⅞
Base Outside Dimensions LxW (inch) 52¼ x 50⅝” 54¼ x 50⅝”
Base Inside Dimensions LxW (inch) 42⅛ x 34⅜ 44 x 34½
Unloaded 16.2 21.5
Raise Time (secs) Loaded 16.8 22.8
Unloaded 22.9 31.3 Down Time (secs)
Loaded 22.7 31.2
Output (w) 1500 1500
Voltage (v) AC110V 60HZ
Revolution (r/min) 1.66cc/rev
Protection Class IP.54
Motor
Insulation Class F.
Net Weight (lbs) 630 850
3.3cc/rev

7. SERVICE INSTRUCTIONS
■ Do routine check of fasteners, packing and oil leaking.
■ Do routine check of the function of the lift table.
■ Before service 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.
■ ONLY a qualified personnel can do service work.
■ Do routine check of the micro-switches on the safety guard.
■ Do routine check of the hydraulic system by listening its noise, touch motor’s surface.
■ Caution: It is necessary to turn off theAC power supply before touch motor’s surface.
■ Pay attention to clear or even replace the oil filter after operating for a long time.
■ Appropriate lubrication is necessary to make the lift table work easily and have a prolonged
service lift.
■ Following table is recommended to service the lift table periodically.
Content After every 500 hour’
working or every 3
months later
After every 2000
hours working or
every year
Check oil level of oil tank ☆
Check the cleanliness of oil filter ☆
Fasten all the connecting parts again ☆
Check wear and tear of pressure oil pipes ☆
Check hydraulic cylinder ☆
Fix main parts tightly again ☆
Check the function of micro-switches ☆
Check whole 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 working ten hours’
Replace hydraulic oil ☆
Check oil leaking ☆
Remark: ☆ stands for proceeding the item.

8. TROUBLE SHOOTING
Note: Before service it is necessary to screw two eyebolts into relevant screw-holes
on the basis lest the table lowers accidentally.
Trouble Cause Remedy
Table cannot lift
while motor works
normally
◇Eyebolt has not been removed
◇AC Voltage phrases mistake
◇Electromagnetic dysfunctions
◇The table is overloaded
◇Remove eyebolt
◇Correct AC voltage phrase
electromagnetic valve and repair it
◇Remove excessive load
Table cannot lift and
motor does not work
◇Lowering limit switch (if switched)
damaged
◇Replace limit switch
Table cannot lower
◇Lowering limit switch or micro-switch
on safety guard damaged
◇Electromagnetic valve dysfunctions
◇Safety guard works
◇Something wrong with electric
circuit board
◇Replace lowering limit switch
switch or micro-switch.
◇Check the function of
electromagnetic valve and repair it
◇Strike the UP button slightly
◇Replace electric circuit board
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
◇Oil not enough
◇Limit switch damaged
◇ Fill enough oil
◇Check and repair limit switch. If
necessary, replace it