Hitachi L Series User manual

Please be sure to hand it over to the customer using.
The customer using should read it before use.
•
This instruction manual explains the handling of Hitachi L-type Electric chain hoist in details so please
ensure to read over it until the end and use it correctly. Facility managers and workers who will use the
equipment should read this manual.
•
This instruction manual describes the items specific to the L-type Electric chain hoist. The attached
"Electric chain hoist owner’s manual" describes the general handling method of Electric chain hoists, so
read the manuals together and use them correctly.
•
When the installation/operation/maintenance are inappropriate, the electric chain hoist cannot be used
smoothly, and may cause unexpected troubles and accidents.
•
After reading, please carefully store all the manuals together and utilize these during maintenance and
inspection.
•
Please note that we do not guarantee Electric chain hoists that are remodeled.
Hitachi Electric Chain Hoist
Service Manual
L-type (single speed)
LN-type (dual speed)
LS-type (single phase)
Original version

Improper use of the Electric Chain Hoist may result in generation of a falling load, electric shock, orother
dangerous state. Before installation, mounting, running, operation, and maintenance and inspection, always
thoroughly read this instruction manual and use the equipment correctly.
Use the equipment after gaining knowledge of the equipment, safety information, and precautions.
This Operation Manual uses the designations “DANGER”, “WARNING”, and “CAUTION” to classify safety
precautions.
In addition, even items designated may be linked to serious results depending on the conditions.
In any case, since the contents are important, always observe them.
*After reading, always store this manual where it can be read by those who use it.
Safety Precautions
:This is a dangerous situation that if not avoided, poses immanent death or serious
injury.
:This is a dangerous situation that if not avoided, could lead to death or serious injury.
:This is a dangerous situation that if not avoided, could lead to minor as semi-serious
injury or that could cause property damage.
DANGER
WARNING
CAUTION
:This shows something that is prohibited (something that must not be done).
For example,when a flame is prohibited, the symbol is shown.
:This shows an instruction (something that must be done).
For example, when the device must be grounded, the symbol is shown.
[Explanation ofWarning Display Ranks]
[Explanation of Prohibited and Instruction Symbols]

1. Introduction ………………………………………………………………………………………………… 0
1-1. Confirmation of the product and accessories …………………………………………………… 1
1-2. About the contents of the instruction manual……………………………………………………… 1
1-3. About guarantee……………………………………………………………………………………… 1
2. Product specifications …………………………………………………………………………………… 2
2-1. Standard specification ……………………………………………………………………………… 2
2-2. Rated specification…………………………………………………………………………………… 2
2-3. Speed specification ………………………………………………………………………………… 3
2-4. Motor specification…………………………………………………………………………………… 3
2-5. Approximate weight ………………………………………………………………………………… 3
2-6. Product view ………………………………………………………………………………………… 4
2-7. Outer dimensions …………………………………………………………………………………… 5
3. Mounting method ………………………………………………………………………………………… 6
3-1. Precautions for mounting …………………………………………………………………………… 6
3-2. Electric wiring ………………………………………………………………………………………… 7
3-3. Connection diagram ………………………………………………………………………………… 8
4. Installation steps ………………………………………………………………………………………… 11
4-1. About attaching the Chain Container …………………………………………………………… 11
4-2. About the installation of cables ………………………………………………………………… 12
5. Cautions for use ………………………………………………………………………………………… 13
6. Maintenance and inspection …………………………………………………………………………… 14
6-1. Daily inspection …………………………………………………………………………………… 14
6-2. Inspection before starting work ………………………………………………………………… 14
6-3. Periodic voluntary inspection …………………………………………………………………… 15
6-4. Disassembly / Assembly ………………………………………………………………………… 15
6-5. Inspection of the electromagnetic brake………………………………………………………… 21
6-6. Adjustment of the electromagnetic brake gap ………………………………………………… 22
6-7. How to inspect the hook ………………………………………………………………………… 23
6-8. How to inspect the chain ………………………………………………………………………… 24
6-9. Inspection of the push-button switch …………………………………………………………… 25
6-10. Inspection of the limit switch …………………………………………………………………… 25
6-11. Inspection of the gears ………………………………………………………………………… 26
6-12. Inspection of the sprocket ……………………………………………………………………… 27
7. Oil ………………………………………………………………………………………………………… 28
8. Part list …………………………………………………………………………………………………… 29
Table of Contents

- 1 -
1. Introduction
Checklist for the product and accessories
Please check the following before use.
(1)Whether or not the product arrived as ordered. Please check the tag
on the product. At that time, please take note of the product number
(MFG. No), which will be useful for later inquiries.
(2)Whether or not the body is deformed or damaged due to accidents
during transportation.
(3)Whether the accessories are present. (Please use the checklist)
1-1. Confirmation of the product and accessories
WARNING
•This instruction manual describes items specific to the L-type Electric chain hoist.
•Regarding the safety precautions on using the Electric chain hoist, and when doing the
mounting, installation, maintenance and inspection, in addition to this instruction manual,
please ensure to read the separate volume "Hitachi Electric chain hoist Owner's Manual and
observe all the cautionary notes.
Accessories list
Service Manual (this manual) 1
Owner's Manual 1
Chain gauge 1
1-2. About the contents of the instruction manual
The contents of this instruction manual are subject to change without notification and without any legal
responsibility on our part.
1-3. About guarantee
•
Within the warranty period (within one year after delivery), provided the equipment is used in accordance with
the cautionary notes given in the instruction manuals, on body labels etc., and provided the cause of the fault
or breakage lies in our design, manufacturing or materials etc., we will repair it free of charge.
•
Even within the warranty period, repair charges may apply for the following situations:
1.The fault is caused by the failure to adhere to the usage method and cautionary notes stated in the
instruction manual of this product
(1)When used at a duty factor or start frequency above the set usage limit
(2)When used with a load exceeding the rating
(3)When the product or accessories had been remodeled
(4)When used in severe environments exceeding the product specifications
2.When used by someone without the required education or qualification prescribed by laws or regulations
3.When used without the routine checks or periodic inspections stipulated by laws and regulations
4. Fault or damage caused by fire, earthquake, lightning strike or other natural disasters
5.When used without exchanging the consumable parts such as the brake, electromagnetic contactor etc.
6. A fault of this product caused by another equipment used in combination with this product
•
Since we do not guarantee for secondary damages such as lost production due to the failure of this product,
when such situation is anticipated, please prepare an auxiliary machine in advance or consult our sales
office.

- 2 -
Machine type Electric chain hoist L-series
Power supply L-type, LN-type (3phase) :220V / 380-415V 50Hz,346V 50Hz,220-230 / 440-460V 60Hz
LS-type (1phase) : 200-220V 50Hz, 220-240V 50Hz, 110V 60Hz, 220V 60Hz
L-type
(single speed)
500kg 0.63kW (50Hz), 0.75kW (60Hz)
250kg 0.45kW (50Hz), 0.55kW (60Hz)
150kg 0.38kW (50Hz), 0.45kW (60Hz)
LN-type
(dual speed)
500kg 0.63 / 0.16kW (50Hz), 0.75 / 0.19kW(60Hz)
250kg 0.45 / 0.11kW (50Hz), 0.55 / 0.14kW (60Hz)
150kg 0.38 / 0.10kW (50Hz), 0.45 / 0.11kW (60Hz)
LS-type
(single phase)
500kg 0.30kW (50Hz), 0.35kW (60Hz)
250kg 0.25kW
Operating voltage AC24V
Electric power feeding method Cabtire cable power supply
Protection structure IP54
Chain (mm) 6.3 (diameter) × 19.1 (pitch)
Environment
Ambient
Temperature -10ºC ~ 40ºC (no freezing)
Humidity 90% or less (no condensation)
Classification ISO : M4, FEM : 1Am
Noise level 75dB or less (A scale : measured at 1m away from the hoist)
Color Orange (Munsell : 2.5YR 6/12)
•
In the special circumstances shown below, the standard specifications cannot be used, so please contact us
separately.
1.When using in acidic, alkaline, salty or in corrosive gas environments.
2.When the ambient temperature exceeds 40°C or the humidity exceeds 90%.
3.When using in an organic solvent or an explosive dust environment, which has danger of explosion or
flammability.
2. Product specifications
2-1. Standard specification
Machine type Intermittent periodic rating (at 63% load factor)
Duty factor Start frequency
L-type (single speed) 40% ED 240starts/h
LN-type
(dual speed)
High-speed 20% ED 60starts/h
Low-speed 10% ED 120starts/h
LS-type
(single speed, single phase) 25% ED 150starts/h
2-2. Rated specification

- 3 -
Machine type Hoisting speed (50Hz / 60Hz)
150kg 250kg 500kg
L-type (single speed) 14.4 / 17 10.0 / 12.0 7.2 / 8.5
LN-type
(dual speed)
High-speed 14.4 / 17 10.0 / 12.0 7.2 / 8.5
Low-speed 3.6 / 4.3 2.5 / 3.0 1.8 / 2.1
LS-type
(single speed, single phase) 5.0 / 6.0 3.6 / 4.3
2-3. Speed specification
Machine type Motor insulation class
L-type Class E
LN-type Class F
LS-type Class E
2-4. Motor specification
Capacity 150 - 500kg 150 - 500kg
Low lift High lift Low lift High lift
L-type 29 32 33 36
LN-type 32 35 36 39
LS-type 34 37 35 38
Function Standard Model With Emergency Stop
2-5. Approximate weight
Unit : m / min
Unit : kg

- 4 -
2-6. Product view
Push button
Lower hook part
Decelerator / brake side
Upper hook part
Specification
nameplate position
Motor side
Chain
Capacity
Nameplate position
Chain bucket
Operation plug (6P)
Power plug (9P)

- 5 -
2-7. Outer dimensions
L-type LN-type LS-type
Z 468
A 181 183 181
B 182 210
C 125
D 165 185 165
D' 200
E 584
a 27
b 35
c 35.5
d 27
Dimension (mm)
D' :With Emergency Stop Device

- 6 -
3. Mounting method
Please refer to the mounting method that is described in the separate volume "Hitachi Electric chain hoist
Owner's Manual". If you have any questions about mounting, please contact our sales office or distributor. Please
ask a specialist for the construction work.
3-1. Precautions for mounting
WARNING
Mounting and use under the following conditions are extremely dangerous. Please avoid.
• Places where the strength necessary for the mounting cannot be maintained
• Places where the temperature goes lower than -10°C or higher than 40°C, or where the
humidity exceeds 90%
• Places with a lot of acids or salts
* It will cause severe wear and tear of the parts, and there is a risk of injury from falling
loads caused by mechanical failure etc.
• Places with organic solvents or explosive dust.
* There is a danger of ignition, explosion etc.
• Places subject to direct weather, such as wind, rain or snow.
* There is a risk of injury from electric shock or mechanical failure from rust, which can lead
to falling loads.
• Places with a lot of general dust.
* There is a risk of injury due to abnormal operation etc.

For single-phase power
Electric Chain
Hoist
3-phase power
Ground
Power cable
E
E
R S T
R S T
- 7 -
3-2. Electric wiring
WARNING
Before connecting the power source to the Electric Chain Hoist, verify that the power source voltage matches
the power requirement of the product.
• Power source connection (Please provide the distribution panel to be used.)
(1) Always connect the power source through a distribution panel (1 main power switch).
(2) Perform the electric wiring shown in the figure.
(3) Connect the ground wire (green / yellow) of the power cable to ground.
When hoisting operation with no load was checked, in the following cases, the power connection is probably
reversed (reversed phase): Movement are performed opposite the pushbutton signal.
* In this case, turn off the power and then switch the connection of the power cable T and R terminals.
1. Power supply
We recommend cable feeding for the power supply.
2. Mounting location
(1) In the case of a suspended-type Electric chain hoist, please remove the paint and rusts from the above
before of mounting.
(2) In the case of a transverse trolley-attached Electric chain hoist, since it is grounded by contact of the trolley
wheels and the rail, do not paint the contact surface. Also, rust preventive paint is applied to the wheels of
the trolley during shipment from the factory, so please remove it from areas that come in contact with the
rails.
3. Please ensure to connect the wiring of the power supply (R, S, T) to the Electric chain hoist through the
distribution board (main power switch).The distribution board to be used should be organized by the customer.
WARNING
Always perform grounding work. Also, install a leakage circuit breaker in the electric path in
addition to ground.
* To prevent electric shock accidents if by chance there should be electricleakage.

- 8 -
3-3. Connection diagram
(1) L-type (single speed) wiring diagram

- 9 -
(2) LN-type (dual speed) wiring diagram

- 10 -
(3) LS-type (single phase) wiring diagram

- 11 -
Pin
Chain bucket
Nut
Spring washer
Frame
4. Installation steps
4-1. About attaching the Chain Container
Please attach the Chain Container as follows.
(1)
Align the hole positions of the Chain Container and the body frame and insert the two pins attached to the
frame.
(2)
Tighten the nuts with spring washers in between.
DANGER
•
Please ensure that the bolts and nuts are fitted securely without slack or miss.There is a risk
of serious accidents from the fall of the Chain Container.

- 12 -
Power plug (9P)
Screw
Nut
PB wire
Screw
Wire retainer
Nut
PB wire
PB wire
Cable stopper
Operation plug (6P)
In case of L-type (single speed),
LS-type (single speed, single phase)
In the case of LN-type (dual speed)
Insert the nut at the tip of the PB
wire into the corner hole of the
wire retainer and tighten the screw
to prevent its detachment.
Insert the nut at the tip of the PB wire into the corner hole at
the bottom right of the cover and tighten the screw with the
cable stopper to prevent its detachment.
4-2. About the installation of cables
Please install the power cable and the push-button cable as follows.
(1) Check whether the plug is 9P (for power supply) or 6P (for operation).
(2) Push the plugs into the switch part as shown in the figure below.
* There will be a "clicking" sound when the plugs are pushed in.
(3) Pull the plugs lightly to ensure it is fully connected.
(4) Fix the cables as shown in the figure below.

- 13 -
5. Cautions for use
CAUTION
•
When it operates in the opposite direction to the push-button operation, switch the phase
sequence of the power supply or review the motor wiring and operation input wiring referring
to the connection diagram.
1. After installing the Electric chain hoist, please ensure to do a trial run following the attached "Hitachi Electric
chain hoist Owner's Manual".
2. Please avoid sudden reverse rotation (plugging) or excessive small motions (inching). These will put an
excessive load on the contacts of the motor and the electromagnetic contactor and decrease the product life.
3. If operated exceeded the ratings, the temperature of various parts of the Electric chain hoist will rise above the
allowable limit, causing burnout of the motor and shortening the lifetime of the mechanical parts. Even when
using over a short time in a concentrated manner, please do not exceed the prescribed start frequency and
duty factor for each model.
Example) When using the L-type (single speed) for 15 minutes in a concentrated way, set the start frequency
at 60 times / 15 minutes or less, and duty factor at 40% ED or less.
•The start frequency is the number of times the push-button switch is pressed per hour (including inching).
•Calculate the duty factor using the following formula.
Duty factor (%) = ×100
In the hour when the Electric chain hoist is used the most,
the total time (minutes) the motor is powered
60 (minutes)

- 14 -
WARNING
• When performing maintenance and inspection, ensure that the Electric chain hoist power is
shut off, and more than 5 minutes have passed since.
* There is a risk of electric shock and injury from the unexpected operation of the Electric
chain hoist.
• When carrying out maintenance and inspection, ensure to remove any load beforehand.
* There is a risk of injury due to falling loads etc.
• Ensure that the main body of the Electric chain hoist has cooled sufficiently.
* There is a risk of burns.
• While performing maintenance and inspection, ensure to display to that effect (“under
inspection” or “Do not power on” etc.)
* There is a risk of electric shock and injury from the unexpected operation of the Electric
chain hoist.
6. Maintenance and inspection
DANGER
•
Ensure to perform routine checks before using.
•
In case of an abnormality, stop using immediately, and use only after taking appropriate
remedies referring to the section "General causes of malfunction and measures" in the
"Hitachi Electric chain hoist Owner's Manual".
* It is very dangerous to use in a state of abnormality, which can lead to an accident, so do
not operate.
6-1. Daily inspection
6-2. Inspection before starting work
• Confirmation of operation without load
(1)Whether or not the push-button operation is smooth and working correctly as displayed.
(2)Whether or not there is any abnormality in the motion of the Electric chain hoist and the stopping distance
when it is stopped.
(3)Whether or not there is any unusual sound (abnormal noise), vibration or smell.
• Confirmation of operation under the rated load.
Whether or not the braking effectiveness is good.
* Please judge this from the amount of slip after braking when stopped after performing a hoisting operation
with the rated load.
* When the amount of slip is large compared to normal, an adjustment of the brake is necessary.

- 15 -
DANGER
•
In order to use the Electric chain hoist safely and to fully utilize its functions, ensure to carry
out periodic voluntary inspections.
* Conduct the monthly voluntary inspection at least once a month, and the annual voluntary
inspection at least once a year.
•
The voluntary inspection should be carried out by a person with expertise commissioned by
the business operator.
* There is a risk of accident due to falls, abnormal operation etc.
•
If any consumable part is found to have exceeded the standards of usage limits in the
monthly, annual voluntary inspections or any other inspections, or if any other abnormality is
found, stop use until the issue is addressed.
* Using with abnormalities may lead to electric shocks and fall accidents, which are
extremely dangerous. Ensure to take appropriate measures such as adjustment or
replacement.
•
Never use other than genuine Hitachi parts for replacement.
* There is a risk of injury due to electric shocks or falls for breakage of parts.
6-3. Periodic voluntary inspection
6-4. Disassembly / Assembly
1. Disassembly of the housing and the rotor
(1)
Remove the 6P connector and 9P connector from the main unit.
(2)
To unplug, pull out the plug while pushing out the stopper of the plug receptacle with a screwdriver etc.
(3)
Remove 4 screws (M6×12) and remove the side cover.
(4)
To remove the switch stand, remove all the motor wires, transformer wires, and brake wires connected to
the terminal block.
* The switch stand cannot be completely removed unless the wires other than the motor wires are also
removed.
15A 8P terminal block
Switch stand
9P connector6P connector
Side cover
Screw M6×12
(1)
(3)

P
- 16 -
(7)
Remove 4 screws (M6×16) and remove the housing and the rotor.
2. How to disassemble the brake
(1) Disassemble by the same procedure mentioned up to step (4) of ‘1. Disassembly of the housing and the
rotor’.
(2) Remove 4 screws (M6×12) and 4 cover washers, only the 4 M6×16 screws in case of LN-type, and
remove the cover B.
Switch stand
packing
Screw M5×12
Rotor
Housing Screw M6×16
6P, 9P
connectors
P
(4)
(6)
(2)
Cover B
Cover washer (L, LS)
screw M6×16 (LN)
screw M6×16 (L, LS)
(5) Remove the one M5×12 screw, then remove the switch stand and the packing.
(6) Detach the 6P connector and the 9P connector from the inside (part P) of the main body.