KROFtools 9831 User manual

USER’S MANUAL
1
Low rise small scissor lift
Ref: 9831
USER’S MANUAL (EN)
Operation Manual & Instruction

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MANUFACTURE AND SERVICE
HYDRAULIC AUTOMOBILE LIFT
Model:
Serial No.:
Year of Manufacture:
Manufacturer:
Name:
Address:
Tel:
Fax:
Http:
AUTHORISED SERVICE CENTRE:

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CONTENTS
Contents
Manufacture and service
Packing, transport and storage
Introduction
l Description of the machine
l Technical specifications
l Safety
l Installation
l Adjustment
l Operation
l Maintenance and care
l Troubleshooting
l Accessory

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PACKING, TRANSPORT AND STORAGE
PACKING (Picture 1)
TRANSPORT (Picture 2)
Packing can be lifted or moved by lift trucks, cranes or bridge cranes.
In case of slinging, a second person must always take care of the load,
in order to avoid dangerous oscillations.
During loading and unloading operation, goods must be handled by vehicles or ships.
At the arrival of the goods, verify that all items specified in the delivery notes are
included.
If finding missing parts, possible defects or damage due to transport, one should
examine damaged cartons according to ‘Packing List’ to verify the condition of
damaged goods and missing parts, also the person in charge or the carrier must be
immediately informed.
The machine is heavy goods! Don’t take manpower load and unload and transporting
way into consideration, the safety of working is important.
Furthermore, during loading and unloading operation, goods must be handled as
shown in the picture. (Picture 2)
STORAGE:
-The machine equipment should be stocked in the warehouse, if stocked outside
should do the disposal well of waterproof.
-Use box truck in the process of transport, use container storage when shipping.
-The control box should be placed perpendicularly during the transport; and prevent
other goods from extrusion.
-The temperature for machine storage: -25ºC-- 55ºC
Picture 2
Picture 1

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INTRODUCTION
This manual has been prepared for workshop personnel expert in the use of
the lift operator and technicians responsible for routine maintenance fitter.
Workers should read the ‘Maintenance & User Manual’ carefully before
carrying out any operation with the lift. This manual contains important
information regarding:
- The personal safety of operators and maintenance workers.
- Lift safety
- The safety of lifted vehicles
CONSERVING THE MANUAL
This manual is an integral part of the lift.
The manual must be kept in the vicinity of the lift, so that the operator and
maintenance staff must be able to locate and consult the manual quickly and at any
time.
Attentively reading Chapter 3, which contains important information and safety
warning, is particularly recommended.
The lift is designed and manufactured according to European Standard
The lifting, transport, unpacking, assembly, installation, starting up, initial
adjustment and testing, extraordinary maintenance, repair, overhauls,
transport and dismantling of the lift must be performed by specialized
personnel from the licensed dealer authorized by the manufacturer.
The manufacturer declines all responsibility for injury to persons or damage to
vehicles or objects when any of the above mentioned operations has been performed
by unauthorized personnel or when the rack has been subject to improper use.
This manual indicates: the operative and safety aspects that may prove useful
to the operator and maintenance worker. For better understanding the
structure and operation of the lift and for best use of the same, workers must
read the ‘Maintenance & Use Manual’ carefully before carrying out it.
In order to understand the terminology used in this manual, the maintenance and
repair activities, the ability to interpret correctly the drawings and descriptions
contained in the manual and be the country in which the machine has been installed.
The same applies to the maintenance and the maintenance fitter must also possess
specific and specialized knowledge both in mechanical and engineering field.
l OPERATOR: person authorized to use the lift
l MAINTENANCE FITTER: person authorized for routine maintenance of the lift.
Manufacturer owns the right to make little change for the manual owing to the
improvement of technology.

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Chapter 1 DESCRIPTION OF THE MACHINE
Machine Application:
This lift can lift each kind of vehicle which weight is not over 2800kg, and is suitable for use in vehicle
tests, maintenance, and caring for automobiles, which is particularly suitable for use in the basement or
on the floor without hole. Meanwhile, this model can be movable with the following device (optional
parts--pole and wheels).
Structure Features:
-Use hidden and thin scissor structure, dispense with construction, the occupation is
small.
-Independent and movable control box, low-voltage controlling, good security.
-Own protection of safety valve and burst-proof equipment for hydraulic failure and
over loading. So when the oil pipe bursts, the machine will not fall quickly.
-Use high quality hydraulic or electric element parts made in Italy, Germany, Japan
and so on.
-Own manual lowering operation when the power is cut off.
-Movable.
Equipment:
-Machine basement (The position and space of equipment installation)
-Machine frame (The main structure of lift and insurance institution)
-Control box (Machine-controlled part)
Basic structure
The machine basement is made of cement and concrete.
Frame
Make of steel connecting rod, main lifting platform, and hydraulic oil tank.
Control box
Under the control box is hydraulic oil tank and hydraulic pump, valve and other control
system. On the control box is electrical system.
Scissor lift is designed and built to lift all kinds of vehicles, all other use are
unauthorized. In particular, the lift is not suitable for washing spray work. And
not lift the vehicle whose weight exceeds the maximum weight.

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Chapter 2 SPECIFICATION
Main technical parameter
Machine type
2.8HS
Drive
Electrical hydraulic
Lifting weight
2800kg
Lifting height
1300mm
Platform initial height
105mm
Platform length
1800mm
Platform width
1040mm
Lifting time
≤50s
Descent time
≤60s
Whole machine length
1800mm
Whole machine width
1330 mm
Weight
350kg
Voltage
AC 380V
Please check the nameplate on control box for
details!
Power
2.2kw
2.2kw
Hydraulic oil
12L corresponds to wearable hydraulic oil
(prepared by user)
Working temperature
5-40℃
Working humidity
30-95%
Noisy level
< 76db
Installation height
Height above sea level ≤ 1000M
Storage temperature
-25℃~55℃
Installation place
Indoor
Table 1

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Motor
Type………………………MS90L
Power……………… 2.2kw
Voltage……………AC 400 or 230V
±5%
Power supply…………… 400VAC:20A
………………230V:40A
Max Frequency………50Hz (optional
choose 60HZ)
Poles…………………………… 4
Speed…………………………1450rpm
/min
Building shape…………………… B14
Pump
Type……………………………P1.7
Model…………………………gear pump
Max flux…………………………1.7cc/r
Joint type………………………direct joint
Overflow valve
Setting pressure………………280 bar
Adjustable working
pressure………150~300 bar
Chapter 2 SPECIFICATION
Lift dimension picture:
Picture 4

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Supply at the same time
-Connect to the power supply jack of control box (400V or 230V)
Requirements:
-Concrete type 425#, the period of desiccation is 15 days.
-Clean the basic layer, thickness of concrete≥150mm, the leveling of whole length≤
5mm.
Chapter 2 SPECIFICATION
THE LOWER PARTS OF THE VEHICLES UNDERBODY COULD
INTERFERE WITH STRUCTURAL PARTS OF THE LIFT, TAKE
PARTICULAR PARTS OF THE SPORTS-CAR.
The lift will also handle customized or non-standard vehicles provided they are within
the maximum specified carrying capacity.
Also the personnel safety zone must be defined in relation to vehicle with unusual
dimensions.

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Chapter 3 SAFETY
Read this chapter carefully and completely since important information for the
safety of the operator or others in case of improper use of the lift is included.
In the following text there are clear explanations regarding certain situations of
risk or danger that may arise during the operation or maintenance of the lift,
the safety device installed and the correct use of such systems, residual risks and
operative procedures to use (general specific precautions to eliminate potential
hazards).
Lifts are designed and built to lift vehicles and hold them in the elevated
position in an enclosed workshop. All other uses of the lifts are unauthorized.
In particular, the lifts are not suitable for:
-Washing spray work;
-Creating raised platforms for personnel or lifting personnel;
-Use as a press for crushing purposes;
-Use as elevator;
-Use as a lift jack for lifting vehicle bodies or changing wheels.
The manufacturer is not liable for any injury to persons or damage to vehicles
and other property caused by the incorrect and unauthorized use of the lifts.
During lifting and descent, the operator must remain in the control station as the
diagrams illustrated.
As the diagrams illustrated, the presence of persons inside the danger zone indicated
is strictly prohibited. During operations, persons are admitted to the area beneath the
vehicle only when the vehicle is already in the elevated position, when the platforms
are stationary, and when the mechanical safety devices are firmly engaged (e.g.: the
safety gear is completely locked).
DO NOT USE THE LIFT WITHOUT PROTECTION DEVICES OR WITH THE
PROTECTION DEVICES INHIBITED.
FAILURE TO COMPLY WITH THESE REGULATIONS CAN CAUSE
SERIOUS INJURY TO PERSONS, AND IRREPARABLE DAMAGE TO THE LIFT
AND THE VEHICLE BEING LIFTED.
Picture 6

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Chapter 3 SAFETY
GENERAL PRECAUTIONS
The operator and the maintenance fitter are required to observe the
prescriptions of safety regulation in force in the country of installation of the lift.
Furthermore, the operator and maintenance fitter must:
-Always work in the stations specified and illustrated in this manual;
-Never remove or deactivate the guards and mechanical, electrical, or other types of
safety devices;
-Read the safety notices placed on the machine and the safety information in this
manual.
In the manual all safety notices are shown as follows:
WARNING: indicates following operations that are unsafe and can cause
minor injury to persons and damage the lift, the vehicle or other property.
CAUTION: indicates possible danger that can result in serious injury to
people and damage property.
RISK OF ELECTRIC SHOCK: a specific safety notice placed on the lift in
areas where the risk of electric shock is particularly high.
RISK AND PROTECTION DEVICES
We shall now examine the risks that operators or maintenance fitters may be exposed
to when the vehicle is standing on the platforms in the raised position, together with
the various safety and protection devices adopted by the manufacturer to reduce all
such hazards to the minimum:
For optimal personal safety and safety of vehicles, observe the following regulations:
-Do not enter the danger areas when vehicles are being lifted. (Picture 6)
-Make sure the vehicle is positioned correctly. (Picture 7)
-Be sure to lift only approved vehicles, never exceed the specified carrying capacity,
maximum height, and projection (vehicle length and width);
-Make sure that there is no person on the platforms during up and down movements
and during standing.
GENERAL RISKS FOR LIFTING OR DESCENT:
The following safety equipments are used to protect over loading or the possibility of
Picture 7

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Picture 8
engine failure.
In the condition of over loading, the overflow valve will open and directly return oil to
the oil tank. (See Picture 8)
Chapter 3 SAFETY
Each bottom of oil cylinder is equipped with antiknock valve. When the oil pipe is burst
in the circuit of hydraulic pressure, the relevant antiknock valve will work and limit the
speediness of platform. (See Picture 9)
There is nothing abnormal should be left on the safety modules to prevent
safety gear from occlude normally.
RISKS FOR PERSONNEL
This heading illustrates potential risks for the operator, maintenance fitter, or
any other person present in the area around the lift, result from incorrect use of
the lift.
RISKS FOR EXTRUSION
During up and down operations, personnel leave the said area without following
the rule and instruction.
During up and down operations, no person is admitted to work beneath the movable
parts of the lift, should work in the safe zone. (Picture 6)
RISK OF IMPACT (Picture 10)
Before the operator begins up and down movements, make sure that there are
no personnel inside the danger zone. When, due to operational reasons, the lift
is stopped at relatively low elevations (lower than 1.75m above the ground)
personnel must be careful to avoid impact with parts of the machine not
marked with special colors.
RISK OF FALLING OFF (PERSONNEL)
During up and down operations, personnel are prohibited from entering the
platforms and the vehicle to avoid falling off.
RISK OF FALLING (VEHICLE)
This hazard may arise in the case of incorrect positioning of the vehicle on the
platforms, overweight of the vehicle, or in the case of vehicles of dimensions
Picture 9
Picture10（safety lock）

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that are not compatible with the capacity of the lift.
When the platform is being tested, the vehicle engine cannot be turned on.
There is nothing should be placed on the lift-lowering area and the movable
parts of the lift.
Chapter 3 SAFETY
RISK OF SLIPPING (Picture 12)
The floor caused by lubricant contamination of around the lift. The area beneath
and immediately surrounding the lift and also the platforms must be kept clean.
Remove any oil spills immediately.
RISK OF THE CENTER OF GRAVITY OF VEHICLE
The car Centre of gravity must be placed in the center of the lifting machine (Picture13)
RISK OF ELECTRIC SHOCK
Risk of electric shock of the areas of insulated in electric equipments were
shattered.
Do not use jets of water, steam solvents or paint next to the lift, and take special care
to keep such substances clear of the electrical control panel.
RISKS RELATED TO INAPPROPRIATE LIGHTING
The operator and the maintenance fitter must be able to assure that all the
areas of the lift are properly and uniformly illuminate compliance with the laws
in force in the place of installation.
During up and down operations, the operator should continually observe the lift and
can operate it only in the position of operator. When lifting and lowering the vehicle,
the cushion needs being put in the bottom of chassis.
The handling of safety devices is strictly forbidden. Never exceed the maximum
carrying capacity of the lift, make sure the vehicles to be lifted have no load.
It is therefore essential to adhere scrupulously to all regulations regarding use,
maintenance and safety contained in this manual.
Picture 12
Picture 11

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Chapter 4 INSTALLATION
SKILLED AND AUTHORIZED PERSONNEL ONLY SHOULD BE
ALLOWED TO PERFORM THESE OPERATIONS, FOLLOW ALL
INSTRUCTIONS SHOWN BELOW CAREFULLY, IN ORDER TO PREVENT
POSSIBLE DAMAGE TO THE CAR LIFT OR RISK OF INJURY TO PEOPLE.
Skilled technicians only appointed by the same manufacturer or by authorized dealers,
are allowed to install the car lift.
INSTALLATION REQUIREMENTS
l The car lift must be installed according to the specified safety distances from walls,
pole and what other equipments stated. (Picture 14)
l The specified safety distances from walls must be 1000 mm at least, taking into
consideration the necessary space to work easily. Because space for the control
site and for possible runways in case of emergency is also necessary.
l The room must be previously arranged for the power supply and pneumatic feed
of the car lift.
l The room must be 4000 mm in height, at least.
l The car lift can be placed on any floor, as long as it is perfectly level and
sufficiently resistant. (≥250 kg/ cm², the thickness of concrete ≥ 150 mm)
Picture 14
l All parts of the machine must be uniformly lit with sufficient light to make sure that
the adjustment and maintenance operations can be performed safely, and without
reflected light, glare that could give rise to eye fatigue.
l The integrality of arrived goods should be checked before the lift is installed.
l Moving and installing lift should follow the process as the picture instructs.
The transport and storage of machine refers to “TRANSPORT AND STORAGE”
on page 4.

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Picture 15
Chapter 4 INSTALLATION
Platform Installation:
-Place the platforms on the position of the location.
-The bottom of hydraulic cylinder is located in the frontage
of machine (the direction of driving on the vehicle)
-Use fork lift or other lifting equipments to lift the platform
(Picture 15) and insert a wood in the middle part of joint
pole.
Prohibit working beneath the lift when hydraulic
system is not completely equipped with hydraulic oil
and take the action of up and down operations.
LINE CONNECTION
Connect the electrical and oil line according to ‘the electrical diagram’ and ‘oil
pipe connection diagram’.
In the process of connecting oil pipe, pay particularly attention to the protection
of pipe tie-in to prevent abnormal thing from entering oil loop, then damaging
hydraulic system.
ELECTRIC CIRCUIT CONNECTION:
Follow the stated line- pathway and line-number of the ‘electrical diagram’ to connect
electric circuit.
Only skilled person is allowed to perform the operations.
-Open the control box front cover.
-Connection of power supply: the 380V three-phase and five-line
connection wires (3×2.5 mm2＋2×1.5 mm2 cable wire) for power supply are
connected to control box L1, L2, L3, N and entering-wire terminal. If the lift is operated
at 230V single-phase, then connected to control box L2, N2 ,entering-wire
Terminal.The The PE ground wire is connected under the bolt marked ground firstly
(Picture 16) and then connected under the bolt marked ground of two platforms.
-If the lift is operated at 230V three-phase, change the connection on the transformer
and motor. (Picture 17)
Picture 16
Picture 17

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Chapter 4 INSTALLATION
Oil PIPE CONNECTION:
Follow “oil pipe diagram “to connect the oil pipes.
Only skilled and authorized person is allowed to perform the operations.
And pay particularly attention to the protection of oil pipe fitting.
-Following oil pipe number to lead the oil pipe from control box to the cylinder.
(Refer to “oil pipe diagram”)
-When connecting oil pipes, pay attention to the protection of oil pipe tie-in to
prevent impurities from entering hydraulic circuit.
When connect the oil pipes, be careful not to mistake each oil pipe number.
During the standard installation, control box is in the nearside of
vehicle-entering direction. If placed on the right should adjust relevant oil pipe.

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Chapter 5 ADJUSTMENT
Add oil and check the order of phase.
After installing lift as Picture 4 required and connecting hydraulic circuit and
electric circuit, operate it as following:
-open the hydraulic oil tank, add 12L of hydraulic oil into the oil tank, the hydraulic oil is
provided by the user.
Make sure the clean of hydraulic oil, prevent any impurity into the oil line, lead the
digest of the oil line and no working of the electromagnetic valve.
-Turn the “MAIN SWITCH” to turn on power, and click the ‘UP’ button, check whether
the motor turns clockwise (looking downward), if not press power button, change the
phase of the motor.
When turn on power, the high voltage will exist in the control box, only
authorized person can operate it.
No load of main machine test:
-Turn on ‘MAIN SWITCH’ to turn on the power.
-Press “UP” button, pay attention to the synchronization and placidity of the lifting.
-Check whether lock latch is correctly located.
-Check whether the oil line and the air line are leakage.
When testing the lift, no person or other things are allowed to stand or be put
near the two sides or beneath the machine. If any abnormal is found, turn off
“MAIN SWITCH” to stop it immediately. After clearing obstacles, do the test
again.
Load of machine test:
-Drive the vehicle which weight doesn’t exceed maximum lift weight to the platform,
and then the driver leaves it.
-Put the lift rubber on the platform.
-Press ‘UP’ button, lift the platform and pay attention to the synchronization and
placidity of the lifting.
-Check whether safety pawl is correctly located.
-Check whether the oil line and the airline are leakage.
When beginning load of machine test, no person or other things are allowed to
stand or be put near the two sides or beneath the machine.
Test vehicle whose weight doesn’t exceed maximum lift weight.
Check whether the oil line and the air line are leakage. If any abnormal is found, urn
off “MAIN SWITCH” to stop it immediately. After clearing obstacles, do the test again.

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Chapter 6 OPERATION
Only skilled and having been trained personnel is allowed to perform the
operations. Check proceedings as following.
Operation Notices:
-Clear obstacles around the lift before operation.
-During lifting or lowering, no person is allowed to stand near the two sides and
beneath the machine, and no person is allowed on the two platforms.
-Avoid to lifting over weight vehicles or other goods.
-When lifting vehicle, the chassis of the vehicle should be filled up with rubber
cushion.
-Pay attention to the synchronization of the lifting and lowering. If any abnormal is
found, stop the machine timely, check and remove the trouble.
-When the equipment is not used for a long time or overnight, the machine should be
lowered to the lowest position on ground, and remove vehicle, then cut off power
supply.
Instructions on electric operation: (see the operation panel)
LIFTING:
-Press ‘UP’ button on power unit, the oil pump will work immediately.
Hydraulic oil is sent to hydraulic cylinder, and the platforms are being lifted.
-Release ‘UP’ button, the oil pump will stop immediately. The platforms stop lifting.
DESCENT:
-Press the lever at the power unit, and the platforms descend.
-Release the lever, platforms stop descending.
Chapter 7 MAINTENANCE AND CARE
Skilled personnel only are allowed to perform the operations.
-All bearings and hinges on this machine must be lubricated once a week by
using an oilier.
-The upper and lower sliding blocks and other movable parts must be lubricated once
o month.
-The hydraulic oil must be replaced one time each year. The oil level should always be
kept at upper limit position.

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The machine should be lower to the lowest position when replace hydraulic oil,
then let the old oil out, and should be filtering the hydraulic oil.
-Each team checks the agility and reliability of pneumatic safety equipment.
Chapter 8 TROUBLESHOOTING
Skilled personnel only are allowed to perform the operations.
Failure and Resolutions
Failure
Cause
Troubleshooting
The motor
does not run in
lifting
operation.
① Connection of power
supply wires is not correct.
Check and correct wire connection
② The AC contactor in the
circuit of the motor does
not pick up.
If the motor operates when forcing the
contactor down with an isolation rod, check
the control circuit. If the voltage at two ends
of the contactor coil is normal, replace the
contactor.
③The limit switch is not
closed.
Check the limit switch, wires, to adjust or
replace the limit switch.
In lifting
operation, the
motor runs, but
there is no
lifting
movement
① The motor turns
reverse.
Change the phases of the power supply
wires.
② Lifting with light load is
normal but no lifting for
heavy load.
The set safe pressure of the over-flow valve
may be increased by turning the set knob
right ward slightly.
The spool of the lowering solenoid valve is
stuck by dirt. Clean the spool.
③ The amount of hydraulic
oil is not enough.
Add hydraulic oil.
When press
“down
handle”, the
machine is
not lowered
①The ‘antiknock valve’ is
blocked.
Remove the ‘antiknock valve’ from the oil
supply hole at the bottom of the oil cylinder,
and clean the “antiknock valve”.
The machine
lowers
extremely
slowly under
normal loads.
①The hydraulic oil has too
high viscosity or frozen,
deteriorated (in Winter).
Replace with hydraulic oil in accordance with
the instruction book.
② The “antiknock valve”
for preventing oil pipe burst
is blocked.
Use a wood block on the bottom plate to lock
the lift, then remove the “antiknock valve”
from the oil supply hole at the bottom of the
oil cylinder, and clean the ‘antiknock valve’.
Noisy lifting
and lowering.
①Lubrication is not
enough.
Lubricate all hinges and motion parts
(including piston rod) with machine oil
② The base or the
machine is twisted.
Adjust again the levelness of the machine,
and fill the pad the on base.
Table 2
Chapter 9 Disposal of used oil
Used oil, which is removed from the power unit and the plant during an oil change,
must be treated as a polluting product, in accordance with the legal prescriptions of
the country in which the lift is installed.
Chapter 10 Machine demolition
The machine must be demolished by authorized technicians, just like for assembling.
The metallic parts can be scrapped as iron. In any case, all the materials deriving from

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the demolition must be disposed of in accordance with the current standards of the
country in which the rack is installed. Finally, it should be recalled that for tax purposes,
demolition must be documented; submitting claims and documents according to the
current laws in the country in which the rack is installed at the time the machine is
demolished.
ACCESSORY
Hydraulic pressure elements diagram