KITO TWER2 Installation manual

OM No.TWER 2-0903-MG-01
Introduction
KITO Twin Hook Electric Chain Hoist is intended to make accurate and safe parallel operation with the single motor and twin
hooks, which is best suited to applications where a long object or even lifting is required by using two lifting points.
Safety Precautions
Disassembly, assembly, repair, and adjustment of the electric chain hoist should be performed•
only by maintenance personnel.
Failure to follow this precaution may cause serious accidents leading to serious or even fatal injury.
DANGER
PROHIBITED
ER2 Twin Hook Electric Chain Hoist
(250kg to 5t)
Operation Manual
(TWER2/TWER2M/TWER2SP/TWER2SG)
COMPULSORY
This operation manual describes specific information regarding the Twin Hook Electric Chain•
Hoist. Before use, read and comply with both the ER2 Series Electric Chain Hoist (250kg to 5t)
Owner's Manual (separate volume) and this manual.
Sufficiently lubricate the load chain and idle sheave.•
Failure to follow these precautions may cause serious accidents leading to serious or even fatal injury.

2
Product Specifications
This twin hook electric chain hoist is designed the same as a standard hoist. Please refer to the sections of "Product
Specifications" in "ER2 Series Electric Chain Hoist Owner's Manual" (separate volume).

3
Trolley Configurations & Name
■
TWER2M (Motorized Trolley)
TS2 Series
plane trolley
Suspender
Frame F
Chain guide
Balance weight
Connection board
Idle sheave
Span
Nut
Screw fitting
Bottom hook 2
Frame M
Cushion rubber or
chain spring
Stopper
(load side)
Bottom hook 1
MR2 Series
motorized trolley ER2 Series Electric
Chain Hoist
Steel bucket dedicated
for twin hook type
Suspender
Cushion rubber
Stopper
(no-load side)
■TWER2 (Hook suspension)
Frame F
Chain guide
Balance weight
Connection board
Idle sheave
Span
Nut
Screw fitting
Bottom hook 2
Cushion rubber or
chain spring
Stopper
(load side)
Bottom hook 1
Frame M
ER2 Series Electric
Chain Hoist
Steel bucket dedicated
for twin hook type
Top hook
Cushion rubber
Stopper
(no-load side)

4
Assembly
■Trolley Width Adjustment
The Twin Hook Electric Chain Hoist (TWER2M) was pre-adjusted at the time of shipment to the beam width of the
customer on site. Depending on installation and space conditions, when it needs to disassemble and assemble the
trolley upon rearrangement or maintenance of the trolly frame, please refer to the section of "Combination with the
Trolley" in the ER2 Series Electric Chain Hoist (250kg to 5t) Owner's Manual (separate volume).
■Adjusting the Height of Bottom Hook
Do not adjust the height of the bottom hook beyond the threaded range visible from the check•
hole.
Failure to follow this precaution may cause serious accidents leading to serious or even fatal injury.
DANGER
PROHIBITED
COMPULSORY
Fasten nuts with the specified torque.•
Replace with a new split pin and be sure to insert and bend it.•
Failure to follow these precautions may cause serious accidents leading to serious or even fatal injury.
CAUTION
After installation, adjust the height of the bottom hook under no load.•
Failure to follow this precaution may cause serious injury or property damage.
COMPULSORY
Load chain
Chain pin
Screw fitting
Nut
Spring washer
Check hole
Connection fixture
●Single-chain Type
1) Measure the difference between heights of bottom hook 1 and
bottom hook 2 with the load suspended.
2) Remove the load and then loosen the nut.
3) Turn the screw fitting to adjust the height of the hook (within
the threaded range visible from the check hole).
4) Fasten the nut to fix the screw fitting (Torque: M16 - 164Nm,
M20 - 329Nm, M24 - 570Nm).
Chain pin
Load chain Screw fitting
Nut
Spring washer
Check hole
Connection fixture
●Double-chain Type
1) Measure the difference between heights of bottom hook 1 and
bottom hook 2 with the load suspended.
2) Remove the load and the chain pin.
3) Loosen the nut and then adjust the screw fitting by a length
twice the measured within the threaded range visible from the
check hole.
4) Fasten the nut to fix the screw fitting (Torque: M16 - 164Nm,
M20 - 329Nm, M24 - 570Nm).
5) Make sure that the load chain is not twisted. Insert the chain
pin so that its head is oriented as shown in the left picture,
and insert a new split pin to fix it.

5
■Attaching Load Chain Accessories
The load chain is provided with a chain spring, a cushion rubber, a stopper, and a chain fixing plate in place. The
variations and installation of these parts differ from each capacity.
When replacing any of these parts or the load chain, attach properly them as follows.
●Chain Accessories Variatoins
The accessories are installed at the specific place as shown in the following table with reference to the figures on
Page 3 for single chain fall and on this page for double chain fall.
Rated load
250kg(125kg+125kg)
490kg(245kg+245kg)
500kg(250kg+250kg)
1t (500kg+500kg) 2t (1t+1t)
2.8t(1.4t+1.4t)
3t(1.5t+1.5t)
*3.2t(1.6t+1.6t)
4.8t(2.4t+2.4t)
5t(2.5t+2.5t)
Chain fall Single-chain type (single chain fall) Double-chain type (double chain fall)
Load side
Accessory Stopper
Cushion rubber
Stopper
Cushion rubber
Stopper
Chain spring
Limit stopper
Stopper
Chain spring (2 types x 2)
Limit stopper (2)
Stopper
Chain spring (2 types x 2)
Limit stopper (2)
Attached
position 5th link 6th link 5th link 6th link 5th link
No-load
side
Accessory Stopper
Cushion rubber
Stopper
Cushion rubber
Stopper
Cushion rubber
Stopper
Cushion rubber
Stopper
Cushion rubber
Attached
position 3rd link 3rd link 3rd link 3rd link 3rd link
*It is for Europe.
Double-chain type (double chain fall)
Stopper
Limit stopper
Chain spring (long)
Chain spring (short)
Cushion rubber
Stopper
Attachment of a stopper

6
Installation
For installation of the Twin Hook Electric Chain Hoist, refer to "Installation" in the ER2 Series Electric Chain Hoist Owner's
Manual (separate volume). With reference to the trolley mount, mounting the trolley at the end of the beam is the best
method from the structural point of view.
Installation or uninstallation should be performed only by personnel who are professional or•
competent.
(Consult your dealer or KITO; otherwise make a request of professional or competent
personnel for installation.)
Failure to follow this precaution may cause serious injury or property damage.
DANGER
PROHIBITED
CAUTION
At the time of installation, make sure that the load chain properly engages with the idle sheave•
without being twisted or slack. In mounting the trolley onto the beam by extending the trolley
width, make sure that the trolley does not derail.
Failure to follow this precaution may cause serious injury or property damage.
COMPULSORY
Operations
This twin hook electric chain hoist is operated the same as a standard hoist. Please refer to the sections of "How to Use"
in "ER2 Series Electric Chain Hoist Owner's Manual" (separate volume).
Do not obliquely lift a load.•
Do not use the twin hooks whose heights are different.•
Do not lift a load only via the Bottom hook 2.•
Failure to follow these precautions may cause serious accidents leading to serious or even fatal injury.
DANGER
PROHIBITED
CAUTION
When lifting a load only via the Bottom hook 1, reduce the load to a half of the rated load or•
less.
Make sure that the twin hooks vertically rises in lifting a load.•
Use a hoist whose specifications (span) is suited for a load length.•
Failure to follow these precautions may cause serious injury or property damage.
COMPULSORY

7
Maintenance
■Daily Inspection and Periodic Inspection
Sufficiently lubricate the load chain and idle sheave.•
Before use, make sure that the limit switch properly works in lifting under no load.•
Failure to follow these precautions may cause serious accidents leading to serious or even fatal injury.
DANGER
COMPULSORY
CAUTION
Use properly the hoist in accordance with operational instructions as carrying out the daily•
and periodic inspections.
Periodically lubricate the needle bearing in the idle sheave by using the grease gun through•
two grease nipples.
Idle sheave
Outer ring
Thrust needle bearing
Inner ring
Grease nipple
Sheave shaft
Bearing
Fasten the bolts and screws with the proper torque.•
Failure to follow these precautions may cause serious injury or property damage.
COMPULSORY
In addition to the inspection items in the ER2 Series Electric Chain Hoist Owner's Manual (separate volume), please also
check the Twin Hook Electric Chain Hoist on the following items for the daily and periodic inspections. With reference to
"Criteria" of the inspection items in the ER2 Electric Chain Hoist (250kg to 5t) Owner's Manual, please turn to the points
for the same capacity as that (total capacity) of Twin Hook Electric Chain Hoist.

8
Twin Hook Electric Chain Hoist Inspection Items
Items
Inspection
period Inspection method Criteria When failed
Daily Periodic
Appearance
○ ○
- Visual check - There is no damage,
deformation, or remarkable
corrosion.
- The unit is not tilted (the
balance weight is attached).
Replace damaged parts.
Attach the balance weight.
Limit switch
○ ○
- Check the operation with no
load.
- Make sure that the hook stops
at the upper-limit and can be
lowered.
Contact your dealer.
Position of bottom
hook ○ ○ - Visual check - Even and accurate in position Adjust the height.
Bolts and nuts for
frame F/M ○ ○ - Visual check - There is no loose or dropped- out bolt or nut.
Fasten securely.
Each hole of frame
F/M
○
- Measurement using a slide
caliper
- The amount of wear is 5% or
less (the difference between
vertical and horizontal
diameters of each hole is 5%
or less).
Replace damaged parts.
Chain guide ○- Visual check - There is no remarkable
damage, deformation, or wear.
Replace damaged parts.
Nut for screw fitting
○ ○
- Visual check - There is no loose or dropped-
out nut.
- The screw section can be
checked from the check hole.
Fasten securely.
Suspender
○
- Measure the hole diameter
using a slide caliper.
- The amount of wear is 5% or
less (the difference between
vertical and horizontal
diameters of each hole is 5%
or less).
Replace damaged parts.
Idle sheave
○ ○
- Visual check
- Daily inspection: Operation
with no load
- Periodic inspection: Operation
with a rated load
- Sufficiently lubricate.
- Smoothly rotating without
irregular sound.
Lubricate through the grease
nipple.
Replace damaged parts.