Columbus McKinnon Coffing LHH-B Series User manual

© 2019 Columbus McKinnon Corporation. All Rights Reserved 1 LHH-B P/N 192063327 REV. AA March 2019
OPERATING, MAINTENANCE
& PARTS MANUAL SUPPLEMENT
Series LHH-B
HAND CHAIN HOIST SUPPLEMENT
LHH-B LOAD LIMITER SETTING INSTRUCTIONS

© 2019 Columbus McKinnon Corporation. All Rights Reserved 2 LHH-B P/N 192063327 REV. AA March 2019
COFFING HOIST PARTS AND SERVICES ARE AVAILABLE IN THE UNITED
STATES AND IN CANADA
As a COFFING Hoist and Trolley user you are assured of reliable repair and parts services through a
network of Master Parts Depots and Service Centers that are strategically located in the United States and
Canada. These facilities have been selected on the basis of their demonstrated ability to handle all parts
and repair requirements promptly and efficiently. To quickly obtain the name of the Master Parts Depot or
Service Center located nearest you, call [phone], Fax: [phone], visit www.cmworks.com.
LAS PIEZAS Y REPARACIONES DE LOS POLIPASTOS DE COFFING ESTÁN
ASEGURADAS EN ESTADOS UNIDOS Y CANADÁ
Como usuario de un polipasto y carro de COFFING le aseguramos cualquier reparación o la disponibilidad
de cualquier pieza de repuesto a través de una red de almacenes de piezas de repuesto y centros de
servicio situados estratégicamente en Estados Unidos y Canadá. Estas instalaciones se han seleccionado
en base a su capacidad demostrada en la reparación de equipos y suminstro de piezas de repuesto de
forma rápida y eficaz. Para obtener la dirección del almacén de piezas de repuesto o del centro de servicio
más cercano, llame al teléfono [phone]. Fax: [phone], visita www.cmworks.com (sólo en
Estados Unidos y Canadá).
LE SERVICE DE RÉPARATION ET DE PIÈCES POUR PALANS COFFING EST
DISPONIBLE AUX ÉTATS-UNIS ET AU CANADA
Soyez assurés qu'en temps d'utilisateur de palan et treuil COFFING, d'un service de réparation et de pièces
fiable par l'entremise d'un réseau de Centres de service et de Dépôts de pièces maîtresses qui sont
stratégiquement situés aux États-Unis et au Canada. Ces établissements ont été sélectionnés sur une base
de leur habileté démontrée à s'occuper promptement et efficacement des besoins de réparation de pièces.
Appelez le [phone], Fax: [phone], visite www.cmworks.com pour obtenir rapidement le nom
du dépôt de pièces maîtresses ou du centre de service situé le plus près.

© 2019 Columbus McKinnon Corporation. All Rights Reserved 3 LHH-B P/N 192063327 REV. AA March 2019
GENERAL INFORMATION
The Coffing LHH-B manual (P/N LHH680-6 Rev AA)
and this supplement provide information for the safe
operation and maintenance of this hoist. All persons
operating or maintaining these hoists should be
familiar with the information contained herein and in
the O&M manual. Adherence to the precautions,
procedures, and maintenance practices described
should ensure long reliable operation
CAUTION
To safeguard against the possibility of personal
injury or property damage, follow the
recommendations and instructions of this manual.
This manual contains important information for the
correct installation, operation, and maintenance of
this equipment. All persons involved in the
installation, operation, and maintenance of this
equipment should be thoroughly familiar with the
contents of this manual. Keep this manual for
reference and further use.
WARNING
Using “Commercial” or other manufacturer’s parts to
repair the Coffing Hoists may cause load loss.
To avoid personal injury:
Use only COFFING supplied replacement parts.
Parts may look alike but Coffing parts are made of
specific materials or processed to achieve specific
properties.
Concept & Features
Overload Protection Devices, also known as Load
Limiters, are safety devices designed to limit overload
conditions.
The LHH hand chain hoist has an optional load limiter.
The load limiter is a device that is designed and
calibrated to prevent excessive overloads. Excessive
overload is indicated by hand-chain movement without
corresponding movement of the lower hook block or
load when the unit is operated in the “up” direction.
Should an overload condition be evident, immediately
operate in the “down” direction to remove the excess
load from the unit.
The reduction of the load to the rated capacity or less
will result in automatic restoration to the normal
operation of the unit.
The LHH Load Limiter device can be retrofitted to
existing LHH-B manual chain hoists which were
shipped without the Load Limiter option factory-
installed. The Load Limiter can be installed simply by
replacing the Standard components with the Load
Limiter components.
Structure
The LHH Load Limiter is a friction clutch type load
limiter device. Fig.-1 illustrates its structure. The hand
wheel and friction disc are located between the disc
hub. They are clamped by the force of a disc spring
compressed by a locknut to make a friction-clutch
mechanism. The mechanism is set to a pre-set slip
torque as desired.
The Load Limiter disables operating in the “up”
direction during a possible overload condition, which
operator may not be aware of. During an overload
condition, the device works by declutching the unit
which allows the hand-chain to be pulled without lifting
the load. Therefore, the chain hoist will not be
excessively overloaded, which will minimize damages
to the hoist. The Load Limiter will allow operation in
the “down” direction during an overload condition.
Remove the overload from the hoist as soon as
possible.
Setting the Load Limiter
Load Limiters are set to slip within a given range. Load
Limiters are being set at 125-175% of the rated load
from the factory.

© 2019 Columbus McKinnon Corporation. All Rights Reserved 4 LHH-B P/N 192063327 REV. AA March 2019
Adjustment
If a Load Limiter equipped hoist cannot lift rated load,
or less, then the Load Limiter is not set properly or is
malfunctioning. The slip torque must be adjusted or
the Load Limiter must be replaced.
Precautions
If the hoist does not operate in the “up” direction while
the Load Limiter is functioning properly, eliminate
overload conditions such as greater than rated load,
anchored load, or obstructed load.
Only Qualified Persons should attempt to
disassemble/assemble, repair, or adjust the Load
Limiter.
Load Limiters are pre-set from the factory. Do not
attempt to tighten or loosen the locknut.
Do not attempt to clean the Load Limiter with cleaning
solutions. Do not attempt to lubricate the Load Limiter.
Remove adhered dust or dirt on the Load Limiter using
a cloth.
Moisture absorption may degrade the performance of
the Load Limiter.
Remove dirt from the unit and keep it at ordinary
temperature in a dry condition for storage.
Converting Standard Units with
Optional Load Limiter
(0.5t-5t capacity units)
1. Loosen and remove hand wheel cover nuts and
split-washers/lockwashers.
2. Remove the hand wheel cover.
3. Remove the hand chain.
4. Remove the split/cotter pin, castle nut, and flat
washer.

© 2019 Columbus McKinnon Corporation. All Rights Reserved 5 LHH-B P/N 192063327 REV. AA March 2019
5. Take off the hand wheel.
5a. (1.5t –5t capacity only)
Detach snap rings that retain the Pawls in place,
then remove the Pawls. Attach Pawls for Load
Limiter and snap rings.
6. Insert the Load Limiter.
7. Add one flat washer (exception: add two flat
washers for 3t unit) and secure assembly with
castle nut.
8. Tighten castle nut completely first, then loosen
by turning counterclockwise 60°-90° (enough to
insert split/cotter pin).
9. Bend the tip of the Split/Cotter Pin to secure the
castle nut.

© 2019 Columbus McKinnon Corporation. All Rights Reserved 6 LHH-B P/N 192063327 REV. AA March 2019
10. Insert the hand chain.
11. Affix the hand wheel cover to the unit.
12. Add nuts and split-washer/lockwasher to the
hand wheel cover and tighten.

© 2019 Columbus McKinnon Corporation. All Rights Reserved 7 LHH-B P/N 192063327 REV. AA March 2019
Load Limiter Kits
Part Number
Part Name
Qty
0.5t
1t
1.5t
2t
3t
5t
Kit, Load Limiter Assembly
1
GHE50LP
JHE50LP
KHE50LP
LHE50LP
NHH50LP
PHH50LP
Contains:
(1) Load Limiter Assembly
X
X
X
X
X
X
(2) Pawl, Load Limiter
X
X
X
X
(1) Flat Washer
X

© 2019 Columbus McKinnon Corporation. All Rights Reserved 8 LHH-B P/N 192063327 REV. AA March 2019