Yellow Jackit 10771 Technical manual

ESCO Equipment Supply Company
15270 Flight Path Drive, Brooksville Fl, 34604 Phone [phone] Toll Free [phone] Fax [phone]
www.esco.net
Air-Operated Hydraulic Pressure Jack
10771
(OPERATION INSTRUCTION)
Parts Manual
Minimum: 5.50”
Maximum: 11.90”

ESCO Equipment Supply Company
15270 Flight Path Drive, Brooksville Fl, 34604 Phone [phone] Toll Free [phone] Fax [phone]
www.esco.net
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.
1. 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.
2. Specification & Parameter.
Model No. 10771
Jacking Capacity 50T/25T/10T/
Air Pressure 90-130 psi
Lowest Height 5.5”
Hoisting Height 50T: 2.2” 25T: 2.04” 10T: 2.2”
Weight 143 lbs.
3. 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) Make reasonable choice of clean and dry air pressure (Grease filter much be installed on the air resource),
its application scope should be 90-130psi (The MAX. air pressure of safety valve is 130psi) and within
the rated air pressure scope to guarantee life.
(3) Connect it with air pipe. (See picture A)
(4) Place the air-operated hydraulic pressure jack on a stable, flat, 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 deflection. (Please carefully read the label of <Warnings> which sticks on the operation
rod.) .
(5) When lifting, place some secured 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 filtered &
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 filling opening and fill 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

ESCO Equipment Supply Company
15270 Flight Path Drive, Brooksville Fl, 34604 Phone [phone] Toll Free [phone] Fax [phone]
www.esco.net
wheels balanced with the operation rod in intermediate position.
(9) Don’t 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 to appear a little bit of oil leaking when transporting, loading and using it in the
first time.
4. Transport:
The equipment should be packed in carton. Please see the carrying position as below picture:.
CARRYING POSITION
CARRYING POSITION
5. Equipment Installation, Disassembly and Test.
(1) Equipment installation, when Disassemble, please see (picture A/B/C/D/E/F).
(2) 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 130psi)
6. Operation and Maintenance.
(1) Operation of air-operated hydraulic pressure jack.
a. Operate the handle of hand valve clockwise to carry out lifting. When the equipment lifting
to the rated height then it will stop lifting automatically by itself with the limitation system.
b. Operate the handle of hand valve anticlockwise to carry out moving down. The equipment
will move down automatically by itself with reasonable design principle of air structure.
(2) Equipment maintenance and troubleshooting.
1) Equipment maintenance.
a. Add a few drops of lubricating oil regularly on the air inlet every 30 days once.
b. Don’t keep it at the acid, alkali and corrosive working place.
d. Check the oil tank to make sure whether there is enough hydraulic oil or not every 30 days
once.
c. Keep it clean daily after using.
Notice:
1. Carry the equipment with hands in the (carrying
position), see picture in left side.
2. Please operate it according to the relative warning
indication which sticks on carton.
3. The operator can move the equipment to any
places with the help of operation rod and wheels.

ESCO Equipment Supply Company
15270 Flight Path Drive, Brooksville Fl, 34604 Phone [phone] Toll Free [phone] Fax [phone]
www.esco.net
2) The Way of 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 started under the condition
of turnover.
2. Connector of oil inlet or sealing of oil
cylinder is broken.
3. Inside wall of cylinder is broken
1. Starting the equipment under the
condition of turnover is strictly
prohibited. If it is not in this
condi
tion, 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.
(see picture B)
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 one-way 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.

ESCO Equipment Supply Company
15270 Flight Path Drive, Brooksville Fl, 34604 Phone [phone] Toll Free [phone] Fax [phone]
www.esco.net
It works with
off load but it
does not move
up or move 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.
7. Warning:
(1). Air-operated hydraulic pressure jack is a lifting tool when using. It can not be used as a supporting tool.
Without any secured stands or solid supports on the suitable area under raised vehicle to assure security,
any operators are strictly prohibited to work after the equipment moved up. (Please carefully read the label
of <Warnings> which sticks to the operation rod).
(2). Use the Air-operated hydraulic pressure jack on a flat and resistant surface away from drains and holes.
It is not allowed to use it on a slope floor to avoid lifting objects moving or slipping, especially those
vehicle. Make sure to place some supports under the wheel to avoid slip then the equipment can be moved
up or down. (Please carefully read the label of <Warnings> which sticks to the operation rod).
(3). Always respect production requirement and use the equipment within the scope of jacking capacity.
Don’t be against the operation instruction to use it with overload.
(4). Use clean and dry air pressure. its application scope should be 90-130psi and at the same time to apply
the filtered & clean 32w hydraulic oil. (The MAX. air pressure of safety valve is 130psi)
8. Attachment:
(1). The equipment is with long extension rod and middle extension rod together. Please fix them tightly with
rope during the course of transportation to avoid damaging the host.
(2).The operation rod is packed in another carton. Please take it out and install it in the host according to the
installation indication of operation rod.