Esco 10771 Instruction Manual

Equipment Supply Company

Instruction Manual

Air Hydraulic Jack - 3 Stage Long Style

ESCO #10771

Copyright © 2016 Equipment Supply Co., All rights reserved

REV.10.13.A

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Air Hydraulic Jack - 3 Stage Long Style Model #10771

Please read the warnings and instructions carefully in the manual since they are
concerning the important indications and safety of operation and maintenance.
The Manufacturer is in no way responsible for eventual damages to persons,
animals or equipments caused by improper, erroneous, incorrect and
unreasonable application. Before assemby or use of the jack, make sure all parts
are included and package contains no damaged parts or components. Please
contact ESCO if there are missing or damaged parts/components.

Model 10771, Air Hydraulic Jack - 3 Stage Long Style will be refered to as
“air-operated hydraulic pressue jack” throughout instruction manual.

APPLICATION:
Air-operated hydraulic pressure jack is a newly-designed lifting equipment. It
utilizes compressed air to promote booster cylinder, to make the hydraulic oil
which is stored in oil tank infuse into oil cylinder to move hydraulic cylinder up
& down. It adopts the machinery design combination of hydraulic pressure
with great advantages of delicate design, small dimension, convenient
moving, wide scope of usage, strong jacking capacity and low lifting part.
It is a convenient lifting equipment and low labor intensity of automobile
manufacturing, repairing, engineering mechanism or heavy-facility.

SPECIFICATIONS:

Model No. 10771
Jacking Capacity 50T/30T/15T/
Air Pressure 90-130 psi
Lowest Height 5.5”
Hoisting Height 50T: 2.2” 30T: 2.04” 15T: 2.2”
Weight 143 lbs.

SAFETY NOTICE:

1. Install the operation rod and host together with fixed axis of operation rod. Place
the retaining ring in good order. Insert the air-operated connectors into pipe
connectors according to their different outer size. Pull the locked operation rod to
carry out 3 different directions: lever direction of operation rod & host, direction of
45 degrees and 90 degrees. (As for operation procedure, please see the label of
<Air-operated hydraulic pressure Jack installation instruction> which sticks on the
operation rod.)

2. ALWAYS USE clean and dry air pressure (Grease filter must be installed on the
air resource), its application scope should be 90-130psi (The MAX. air pressure of
safety valve is 130 psi) and within the rated air pressure scope to guarantee life.

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Model #10771 Air Hydraulic Jack - 3 Stage Long Style

3. Connect jack to air supply.

4. Placetheair-operatedhydraulicpressurejackonastable,at,resistant,

dry surface without drains or holes when using. If necessary, place a
wood board under the air-operated hydraulic pressure jack to avoid any

deection.(PleasecarefullyreadtheWarningslabelsonthehandle).

5. When lifting, place support stands or solid supports on the suitable area
under raised vehicle to assure security.

6. Before lifting, please estimate the weight of object and vehicles to
avoid overload. The life of equipment will be affected strongly if it is
overloaded.

7. The air-operated hydraulic pressure jack uses 32w hydraulic oil. Make

surethereisenoughltered&cleanhydraulicoiltosupportthejack,or

the jack is unable to reach it rated hoisting height. If it lacks of oil, please

screwofftheboltofoiltank’sllingopeningandllsuitableamountof

oil then screw on.

8. Don’t shake it sharply when using. To move the air-operated hydraulic
pressure jack, please keep the wheels balanced with the operation
handle in intermediate position.

9. DO NOT place the equipment upside down when using.

10. Please keep the equipment cleaned & out of the reach of children when
not using.

11. It is natural & normal for a little bit of oil leaking when transporting,

loadingandusingitinthersttime.

TRANSPORT:

The equipment should be packed in carton. Please see the carrying position
as below picture:

Notice:

1. Carry the equipment with hands in
the (carrying position), see picture to
the left.

2. Please operate it according to the
relative warning indicated on the
carton.

3. The operator can move the
equipment to any places with the
help of operation handle and wheels.

CARRYING POSITION

CARRYING POSITION

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Air Hydraulic Jack - 3 Stage Long Style Model #10771

EQUIPMENT INSTALLATION, DISASSEMBLY AND TEST

EQUIPMENT TEST:

a. When the Equipment is off load within rated air pressure scope,

operate the handle of hand valve clockwise to make the Jack
move up to the rated hoisting height. After reach the rated hoisting
height, boosting system stops working automatically (The MAX.
air pressure of safety valve is 130psi). Operate the handle of hand
valve anticlockwise to make the jack move down. Dust band and
sealing of cylinder work in good order without gas leaking..

b. Test the equipment with heavy load by special testing machine.

It is able to reach the rated jacking capacity and hoisting height
within the rated air pressure scope. Dustband and sealing of
cylinder work in good order without gas leaking. (The MAX. air
pressure of safety valve is 130 psi).

OPERATION AND MAINTENANCE:

I. Operation of air-operated hydraulic pressure jack

a. Operate the handle of hand valve clockwise to carry out lifting.

When the equipment lifts to the rated height; it will stop lifting
automatically by itself with the limitation system.

b. Operate the handle of hand valve counter-clockwise to lower the

jack. The equipment will move down automatically by itself with
reasonable design principle of air structure.

II. Equipment maintenance and troubleshooting

c. Add a few drops of lubricating oil regularly on the air inlet every

30 days.

d. DO NOT keep jack near acid, alkali or corrosive working places.

e. Check the oil tank to make sure whether there is enough hydraulic

oil or not every 30 days.

f. Keep it clean daily after using.

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Model #10771 Air Hydraulic Jack - 3 Stage Long Style

TROUBLESHOOTING:

Condition Possible reason Troubleshooting

Gas-leak under
the host

Connector or air pipe doesn’t
connect in a right way, or air
pipe is broken.

Connect again or replace the air
pipe or connector after checking.

Gas-leak on oil
cylinder

Dust band or sealing and
cylinder are broken

Check and replace the dust band or
sealing or spare parts.

A little bit of oil
leak

Oil runs into air pipe during
the course of transporting.

It is unnecessary to repair if it works
in good order

A great deal of
oil leak

1. The equipment was
turned upside down or
tilted.

2. Connector of oil inlet or
sealing of oil cylinder is
broken.

3. Inside wall of cylinder is
broken

1. Starting the equipment under
these conditions is strictly
prohibited. If it is not in this
condition, check and make
sure whether there is enough
oil in oil tank or not, if not, it
should add more.

2. Check and replace spare parts.

3. Check and repair cylinder.

Booster pump
does not work

1. One-way valve or spring
is broken.

2. Booster piston or
booster cylinder is
broken

3. Air pressure is not
enough, air pipe
removed or air inlet is
plugged up.

1. Check and replace the spare
part.

2. Check and repair, replace the
spare part if necessary.

3. Check the air pressure whether
is within 90-130psi and the air
way is broken or not.

Booster pump
works in good
order but
cylinder does not
move up.

1. Lack of oil.

2. The steel ball of one­way valve is plugged up.

3. Oil Cylinder is broken.

1. Fill it with hydraulic oil.

2. Take the connector of oil inlet
apart and take out the one-way
valve and spring to clean it.

3. Check and repair cylinder.

It works with off
load but it does
not move up or
moves up slowly
with heavy load.

1. Air pressure is not
enough, air pipe
removed or air inlet is
plug up.

2. one-way valve is
plugged up.

3. Hydraulic oil became
thick

1. Check the air pressure whether
is within 90-130psi and the air
way is broken or not.

2. Check and Take every one-way
valve apart and clean them.

3. Replace the hydraulic oil.