Vestil LDLT User Manual

VESTIL MANUFACTURING CORPORATION

2999 North Wayne St., P.O. Box 507

Angola, IN 46703 USA

Phone [phone] • Fax [phone]

www.vestil.com • [e-mail]

Contents

Warnings and Safety Instructions .................... 1

Receiving Instructions ..................................... 1

Operating Instructions - HT, LDLT ................... 2

Instructions for Battery-Powered Units ............ 3

Power Unit's Operation - HT, LDLT ................. 4

Electrical, Hydraulic Diagrams - HT, LDLT ..... 5

Routine Maintenance & Safety Checks ........... 6

Trouble Shooting Guides - HT, LDLT ............. 7

Revised 10-03 21-126-102

A company dedicated to solving ergonomic and material
handling problems since 1955.

OWNER'S
MANUAL

HYDRAULIC POST TABLES & LONG DECK CART

Model HT, LDLT

1 & 2-Post Hydraulic Parts/Drawing .............8-9

4-Post Hydraulic & DC Parts/Drawing ......10-11

Foot Operated Jack Parts/Drawing ..........12 -15

2-Speed Operating Instructions .....................16

Trouble Shooting Guide ...........................17-18

2-Speed Foot Pump Parts/Drawing ........ 19 - 20

Warning Labels .............................................21

Warranty ........................................................ 22

WARNINGS & SAFETY INSTRUCTIONS

Insure that all employees understand and follow the
following instructions.

• Read and understand the owner's manual before using or

servicing the table.

• For battery-powered units, review the additional warnings

included elsewhere in this manual.

• Do not use the table if any damage or unusual noise is

observed.

• Always watch the table and any load on it carefully when

it is being moved or used.

• Avoid sudden stops or quick turns to prevent accidental

tipping of the table.

• Use caution if you slide a load onto the table top.

• The table's load must be centered and evenly distributed

on the table.

• Do not perform any modifications to the table without the

manufacturer's approval. Failure to receive authorization
for changes to the equipment could void the warranty.

• Maintenance and repairs are to be done only bypersonnel

qualified to perform the required work.

• Do not use brake fluid or jack oil in the hydraulic system.

If oil is needed, use an anti-wear hydraulic oil with a
viscosity grade of 150 SUS at 100°F, (ISO 32 @ 40° C),
or a non-synthetic transmission fluid.

• Use only replacement parts either supplied or approved

by the manufacturer.

RECEIVING INSTRUCTIONS

Every unit is thoroughly tested and inspected prior to
shipment. However, it is possible that the unit may incur
damage during transit. If you see damage when unloading,
make a note of it on the SHIPPER RECEIVER.

Remove all packing and strapping material, inspect for
damage. IF DAMAGE IS EVIDENT, FILE A CLAIM WITH
THE CARRIER IMMEDIATELY! Also, check the platform
size, type of power unit, etc., to see that the unit is correct for
the intended application.

4-POST

2-POST

Long Deck

SINGLE POST

HYDRAULIC POST TABLES

& LONG DECK CART

1

OPERATION INSTRUCTIONS - HT, LDLT

LOADING:

The load rating, in pounds, is shown on the capacity tag located on the base. It indicates the net capacity of the table, assuming
a centered load. Permanent damage to the table or injury to personnel could result from exceeding the listed capacity.

The load size should not exceed the table dimensions by more than 50% and should not exceed twenty-four inches in height.

Do not use the base of the hydraulic table as a storage shelf.

OPERATION:

The manually-powered hydraulic tables are furnished with a foot-pump.

On the single and two-post tables, step on the foot treadle to raise the table and step on the release lever on the right side
of the pump to lower the table.

The four-post table has a two-speed foot pump, separate from the lifting cylinder. Step on the foot treadle to raise the table.
You can change the pump from the low-volume to high-volume by pulling the slide on top of the foot pump back toward the
foot treadle.

The DC-powered table is furnished with either a constant-pressure (dead-man style), push-button (standard), or twin foot switch
(optional) control.

Pressing the "UP" push-button or foot switch will turn the power unit to raise the platform. The platform will raise only while
the control is pressed. Upon releasing the control, the platform will stop and hold its position.

Pressing the "DOWN" push-button or foot switch will energize the lowering valve to allow the platform to descend. Again,
releasing the control will stop the platform movement and the unit will hold its position. Be certain no part of any person or
object is under any part of the platform before lowering the unit.

Attempting to raise the platform when the battery is low will cause the motor relay protection to prevent the motor's operation.
Adequate battery voltage is indicated by a green LED on the motor relay. See the next page for more notes regarding operation
of battery-powered units.

SAFETY:

Keep all personnel clear of the machine when it is in operation.

Do not exceed the table's load rating.

Use caution to avoid tipping the table when placing or sliding a load onto or off of the table.

Avoid obstacles that can cause the base to sudden stop when moving a loaded table, such as cracks in the floor or the corners
of machines, etc. Doing so could cause the post table to tip over or allow the load to slide off the table.

Never use the table if it is in need of repairs or if it seems to be malfunctioning.

Notify your maintenance personnel if you notice anything out of the ordinary, such as odd noises, erratic motion, or damage
to any part of the table or its components.

ORDERING REPLACEMENT PARTS:

We take pride in using quality parts on the equipment we manufacture. We are not responsible for equipment problems resulting
from the use of unapproved replacement parts.

To order replacement or spare parts for this equipment, contact the factory.

In any communication with the factory, please be prepared to provide the machine's serial number, which is indicated on the
machine dataplate.

2

ADDITIONAL INSTRUCTIONS FOR BATTERY-POWERED UNITS

WARNING!

! Working with or near lead batteries is dangerous. Batteries contain sulfuric acid and produce explosive gases. A battery

explosion could result in loss of eyesight or serious burns.

! Do not smoke or allow a spark or flame near batteries. Charge batteries in locations which are clean, dry, and well-ventilated.

! Do not lay tools or anything metallic on top of any battery. All repairs to a battery must be made by experienced and qualified

personnel.

! When working with batteries, remove personal items such as rings, bracelets, necklaces, and watches. Batteries can

produce enough energy to weld jewelry to metal, causing a severe burn.

! Always have fresh water and soap nearby in case battery acid contacts skin, clothing, or eyes.

! Operating the battery with a low battery voltage can cause premature motor contact failure.

! Do not expose the lift or charger to rain or adverse conditions.

! Replace defective cords or wires immediately.

! Check the battery's water level frequently.

BATTERY CHARGER OPERATING INSTRUCTIONS:

Never operate the charger with either of the cables coiled. Operating the unit with the cord wrapping around itself can cause
the cord to overheat, melt, and cause a short-circuit or a fire.

Plug the charger into a standard 115V receptacle. If an extension cord must be used, keep it as short and as large as possible.
A small cord will decrease the output of the charger due to the voltage in the line. This will increase the charging time. It can
also cause the 115V cord to overheat.

When properly connected, the charge LED will indicate the status of charge flowing to the battery, as follows:

Red only - the charger is providing full output to the battery.

Both red and green - the charger is "topping off" the battery.

Green only - the charger is providing a "float," or maintenance, charge.

Remember to unplug the charger before moving the equipment. Failure to do so could cause damage to cords, receptacles,
and other equipment.

TROUBLESHOOTING:

If the unit does not operate, check all the wiring connections to make sure they're both mechanically and electrically sound

- specifically at the battery, the motor, and at any location a wire is connected to the chassis. Also make sure the quick-connect
plug on the end of the pendant control cord is plugged in correctly.

A full-charged lead acid battery in good condition at room temperature should read 12.65 volts. At 11.9 volts it is considered
to be fully discharged and in need of charging. When checking battery voltage, wait at least 1/2 hour after the charger has
been turned off before checking the battery's voltage. If the motor doesn't run, observe the green LED on the motor relay. If
it is not lit, or if the LED goes out when the "UP" control is pressed, the battery voltage should be checked with a voltmeter.

If the batteries aren't being charged by the charger, check the output charger fuse. If it is good, check the battery's state of
charge with a voltmeter.

3

THE POWER UNIT'S OPERATION - HT, LDLT

The electric/hydraulic table utilizes an electric motor directly coupled to a gear-type hydraulic pump to produce the
needed fluid pressure and flow to allow the cylinders to perform the work of lifting the table load.

A hydraulic manifold houses the hydraulic control components, and is bolted directly onto the gear pump.

The power unit's hydraulic components are all treated for 3,000 psi working pressure.

Important parts of the power unit include:

• The electric motor operates on 12 VDC.

• The gear pump. Its shaft is coupled directly to the shaft of the electric motor.

• The check valve. Its purpose is to prevent the backflow of fluid through the pump. In this way it allows the table

to be held at a given elevation indefinitely.

• The pressure relief valve. Its job is to open a path for fluid to flow back to the reservoir in the event that the fluid

pressure built up by the pump exceeds 3,000 psi. Thus the pump cannot generate more than 3,000 psi.

• The lowering solenoid valve. This is an electrically-operated cartridge valve. It contains a screen to keep

contaminants from entering the valve.

• The pressure-compensated flow control spool. This rests under the lowering valve and regulates the fluid flow back

to the reservoir when the valve opens. It allows the table to always lower at the same rate regardless of whether there
is a load on the table or not.

• The hydraulic lift cylinder. On units with a motor or two-speed foot pump, the cylinder has a bleeder valve located

at their top end to allow air to be bled from the hydraulic system.

• The safety velocity fuse. This is a device that is installed in the cylinder's hose port. It closes quickly in the event

of a catastrophic hose failure to prevent the table from collapsing down. The table remains stationary until pressure
is reapplied to the system.

• The hydraulic fluid. The system uses HO150 hydraulic fluid. Any anti-wear hydraulic oil with a viscosity grade of

150 SUS at 100°F (ISO 32 @ 40°C) such as AW 32 or non-synthetic transmission fluid is acceptable.

When the table is to be raised, press the "UP" push-button or foot switch. The motor turns, and in turning it spins the
hydraulic gear pump. Oil is drawn from the reservoir through the suction filter and into the pump. The pump pushes
the then-pressurized oil through the check valve and out to the lift cylinders.

When the table is to be lowered, press the "DOWN" push-button or foot switch. The lowering valve opens, bypassing
the check valve and allowing the oil in the cylinders to return back to the reservoir through the return hose. The rate
at which the table lowers is regulated by the internal pressure-compensated flow spool.

In the event that the table creeps down slowly after releasing the "DOWN" control, it will be necessary to remove the lowering
cartridge valve for inspection and cleaning, as follows:

• Lower the table entirely.

• Remove any load from the table.

• Remove the nut holding the solenoid coil on the valve stem, remove the coil, and then unscrew the valve from

the manifold.

• Inspect the valve for contaminants, and the valve's o-rings and backup washers for cuts, tears, or other damage.

• With the valve immersed in mineral spirits or kerosene, use a thin tool such as a small screwdriver or a small hex

wrench to push the poppet in and out several times form the bottom end of the valve. The valve should move
freely, and 1/16" from closed to open position. If it sticks in, the valve stem could be bent and will need to be
replaced if it doesn't free up after cleaning. Blow the valve off with a compressed-air gun while again pushing the
poppet in and out.

• Inspect the bottom of the manifold's valve cavity for contaminants.

• Again with the thin tool, press on the middle of the flow control spool located in the bottom of the cavity. It should

move down and back up freely.

• Reinstall the valve into the manifold, tightening the valve with approximately 20 lb-ft of torque.

If the table lowers extremely slowly, or not at all, the cylinder's velocity fuse could be closing. This can be caused by air
in the hydraulic cylinders. To bleed the air from the system:

• Lower the table entirely.

• Remove any load from the table.

• Hold a rag over the cylinder's bleeder valve (it looks like a grease zirk) and open the valve about 1/2 turn with a

1/4" or 5/16" wrench. Oil and air will sputter from the valve - once no air is observed, close the valve.

4

5

ROUTINE MAINTENANCE & SAFETY CHECKS - HT, LDLT

Care should be taken to identify all potential hazards and comply with applicable safety procedures
before beginning work.

Only qualified individuals trained to understand mechanical devices and their associated electrical and
hydraulic circuits should attempt troubleshooting and repair of this equipment.

(A) Before each use inspect the following, where applicable:

1.) Frayed wires.

2.) Oil leaks.

3.) Pinched or chafed hoses.

4.) Damage or structural deformation to the structural members, the
cylinder, the foot pump, etc.

5.) Unusual noise or binding or evidence thereof.

6.) Proper functioning of all limit switches.

(B) Inspect monthly for, where applicable:

1.) The oil level. Oil should be 1" to 1 1/2" below the cylinder's

or the reservoir's fill hole with the lift in the fully lowered position.

2.) Oil leaks.

3.) Worn or damaged hydraulic hoses and electrical wires, if applicable.

4.) Integrity of the retaining rings and pins at all pivot points.

5.) Looseness, wear, or damage to the casters' bearings, mounting
hardware, or surface material.

6.) Proper water level in the battery. (DC units only.)

7.) Unusual noises.

8.) Information and warning labels being in place and in good condition.

9.) The need to clean off dirt and debris.

(C) Yearly inspection

The oil should be changed if the oil darkens, becomes gritty, or turns a milky color
(indicating the presence of water). Replace with an anti-wear hydraulic oil with a
viscosity grade of 150 SUS at 100°F, (ISO 32 @ 40°C). Ex: AW 32 or HO 150
hydraulic fluid, or non-synthetic transmission fluid.

6

TROUBLESHOOTING GUIDE, DC UNITS - HT, LDLT

Before performing any task, always lower the table entirely.

Care should be taken to identify all potential hazards and comply with applicable safety procedures before beginning.

Only qualified individuals trained to understand mechanical devices and their associated electrical and hydraulic
circuits should attempt troubleshooting and repair of this equipment.

Consult the factory for any problems not addressed in this manual.

* Check the DC notes page for other troubleshooting notes specific to battery-powered units.

Problem:

1. Power unit doesn't run when "UP"
button is pressed.

2. Motor runs, but table does not move
or only moves slowly. Power unit not
noisy.

3. The power unit runs but makes a
higher-pitched sound; the table does
not move, or the table moves only
slowly.

4. Table raises, then drifts down.

5. Spongy or jerky table movement.

6. Table lowers too quickly.

7. Table won't lower.

8. Table lowers too slowly.

Possible Causes:

A. Upper-travel switch is engaged or

bad.

B. Push-button control cord not plugged

into motor relay assembly properly.

C. Bad motor relay assembly (green

LED not lit at all or turns off when the
motor relay pulls in).

D. Battery voltage low (green LED turns

off as or just after the motor relay

pulls in).
A. Pump is failing to build pressure.
B. Contamination holding open the

lowering valve or the check valve.
A. Pressure relief opening at full

pressure.

A. Contamination holding open the

lowering valve or the check valve.
A. Excessive air in the hydraulic

cylinder.
A. Flow control spool sticking.

A. Solenoid coil is bad.

B. Physical blockage of the structure.

C. Solenoid valve or suction hose

screen plugged.
A. Pinched hose.

B. Flow control spool sticking.

C. Velocity fuse locking (table only

slowly creeps down).

Action:

A. Inspect and test switch. Replace if

bad.

B. Verify that the push-button cable's

plug is connected properly to the
relay assembly's quick-connect.

C. Check for green LED on relay. Consult

the factory.

D. Test with meter. Charge battery if

low (< 12 volts). A fully charged

battery has 12.6 volts.
A. Consult the factory.
B. Remove and inspect. Clean per

instructions in this manual.
A. Check for structural damage or

binding of the posts, etc.
B. Check for table overload condition.

A. Remove and inspect. Clean per

instructions in this manual.
A. Bleed air from the bleeder valve at

the top of the cylinder.
A. Remove plug from FC port; push on

edge of flow spool to ensure it is fully

pressed into the cavity. Pull and

clean spool if dirty.
A. Check with multimeter on diodecheck

function. (Reading for ohms will not

provide an accurate test of the coil.)
B. Inspect for foreign material or

objects that might obstruct the table

or guide posts.
C. Remove and inspect. Clean per

instructions in this manual.
A. Check pressure, supply, and return

hoses for kinks.
B. Remove plug from FC port; push on

flow spool to ensure it is fully pressed

into the cavity. Pull and clean spool

if dirty.
C. Same as for jerky table movement.

7