CM 637 Series User manual

OPERATING,
MAINTENANCE &
PARTS MANUAL
MANUALLY LEVER
OPERATED
CHAIN HOIST
Manual No. 637-E
Before installing hoist, fill in the
information below.
Rated Load __________________
Serial No. ____________________
Purchase Date _______________
37700C
Rated Loads:
3/4, 1-1/2, 3, 6 tons
(750, 1500, 3000 and
6000kg.)
Follow all instructions and warnings for
inspecting, maintaining and operating this hoist.
The use of any hoist presents some risk of personal
injury or property damage. That risk is greatly
increased if proper instructions and warnings are not
followed. Before using this hoist, each operator
should become thoroughly familiar with all warnings,
instructions and recommendations in this manual.
Retain this manual for future reference and use.
Forward this manual to operator.
Failure to operate equipment as directed
in manual may cause injury.
SERIES 637
®

1
CM HOIST PARTS AND SERVICES ARE AVAILABLE
IN THE UNITED STATES AND IN CANADA
As a CM Hoist 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].

SAFETY PRECAUTIONS
Each CM Series 637 Lever Operated Hoist is built in accordance with the specifications contained herein and at
the time of manufacture complies with our interpretation of applicable sections of the * American Society of
Mechanical Engineers Code 830.21 "Manually Operated Lever Hoists".
The safety laws for elevators and for dumbwaiters may specify construction details that are not necessarily
incorporated
in CM industrial hoists. We recommend the use of equipment that meets state and national safety
codes. Columbus McKinnon Corporation cannot be responsible for applications other than those for which
CM
equipment is recommended.
A THIS SYMBOL POINTS OUT IMPORTANT SAFETY INSTRUCTIONS WHICH IF NOT FOLLOWED A
COULD ENDANGER THE PERSONAL SAFETY AND/OR PROPERTY OF YOURSELF AND OTHERS.
READ AND FOLLOW ALL INSTRUCTIONS IN THIS MANUALAND ANY PROVIDED WITH THE
EQUIPMENT BEFORE ATTEMPTING TO OPERATE YOUR CM SERIES 637 LEVER HOIST.
'Copies of this standard can be obtained from ASME Order Department, 22 Law Drive, Box 2300, Fairfield, NJ 07007-2300, U.S.A.
DO'S AND DO NOT'S
Safe Operation of Hoists
The following are Do's and Do Not's for safe operation of
Hoists. Taking precedence over any specific rule listed
here, however, is the most important rule of all, USE
COMMON SENSE. A few minutes spent reading these
rules can make an operator aware of dangerous practices
to avoid and precautions to take for his own safety and
the safety of others. Frequent examinations and periodic
inspections of the equipment as well
as a conscientious
observance of safety rules may save lives as well as time
and money.
1. DO read ASME 830.21, HST-3M and this
Manual thoroughly.
2. DO be familiar with the Hoist operating controls,
procedures and warnings.
3. DO make sure the suspension hook is securely
attached to a suitable support.
4. DO maintain firm footing or be otherwise secure
when operating the Hoist.
5. DO make sure that load slings or other
approved single attachments are properly sized
and seated
in the hook saddle.
6. DO make sure that the hook latch, if used, is
closed and not supporting any part of the load.
7. DO make sure that the load is free to move and
will clear all obstructions.
8. DO take up slack carefully, check load balance,
lift a few inches and check load holding action
before continuing.
9. DO make sure that all persons stay clear of the
suspended load.
10. DO avoid swinging of load or load hook.
11. DO protect load chain from weld spatter or other
damaging contaminants.
12. DO promptly report any malfunction, unusual
performance, or damage of the Hoist.
13. DO inspect the Hoist regularly, replace damaged
or worn parts, and keep appropriate records
of maintenance.
14.
DO use CM Replacement Parts when repairing
a Series 637 Lever Operated Hoist.
15. DO use hook latches.
16. DO apply lubricant to the load chain as
recommended
in this manual.
17. DO NOT apply more than rated load.
18. DO NOT use an extension on the lever.
19. DO NOT use damaged Hoist or Hoist that is not
working correctly.
20. DO NOT use the Hoist with twisted, kinked,
damaged or worn chain.
21.
DO NOT apply a load unless chain is properly
seated in chain wheel(s) or sprocket(s).
22.
DO NOT use load chain as a sling or wrap
chain around the load.
23. DO NOT apply a load if any binding prevents
equal loading on all supporting chains.
24.
DO NOT apply the load to the tip of the hook.
25.
DO NOT operate the Series 637 Lever
Operated Hoist with other than manual power.
26.
DO NOT permit more than one operator to pull
on the lever at one time.
27.
DO NOT allow your attention to be diverted from
operating the Hoist.
28.
DO NOT operate the Hoist beyond limits of load
chain travel.
29. DO NOT use the Series 637 Lever Operated
Hoist to lift, support or transport people.
30.
DO NOT lift loads over people.
31. DO NOT leave an applied load unattended
unless specific precautions have been taken.
32. DO NOT allow sharp contact between two
Hoists or between the Hoist and obstructions.
33. DO NOT allow the chain or hook to
be used as
a ground for welding.
34. DO NOT allow the chain or hook to be touched
by a live welding electrode.
35. DO NOT remove or obscure the warnings
on
the Hoist.
36. DO NOT adjust or repair a Hoist unless qualified
to perform such maintenance.
37. DO NOT attempt to lengthen the load chain or
repair damaged load chain. 2

3
Hoist Safety is up to you...
WARNING - DO NOTAPPLY MORE THAN RATED LOAD.
VIOLATION OF ANY OF THE WARNING LISTED MAY RESULT IN SERIOUS PERSONAL INJURY TO THE
OPERATOR OR NEARBY PERSONNEL BY RELEASED LOAD OR BROKEN HOIST COMPONENTS.
WARNING - DO NOT OPERATE DAMAGED OR MALFUNCTIONING UNIT
- DO NOT OPERATE WITH TWISTED, KINKED OR DAMAGED CHAIN
- DO NOT PULL ON OR TURN FREE CHAINING KNOB IF HOIST IS LOADED.
WARNING
- DO NOT PULLATAN ANGLE. BE SURE HOIST AND LOAD ARE IN A STRAIGHT LINE.
- DO NOT USE UNLESS FRAMEAND CHAIN FORM A STRAIGHT LINE BETWEEN
HOOKS.
- DO NOT USE IF FRAME IS IN CONTACT WITH ANY OBJECT.
- DO NOT USE LOAD CHAINAS A SLING.
- DO NOT USEAN EXTENSION ON THE LEVER.
1
2
3
4
Remember the Series 637 Lever
Hoist was designed to ease our
burden and carelessness not only
endangers the operator, but in many
cases, a valuable load.
The application, the size and type of
load, the attachments to be used
and the period of use must also be
taken into consideration in selecting
the right hoist for the job.
lubricated.
Hooks that are bent, worn or
whose openings are enlarged
beyond normal throat opening
should not be used. If latch
does not engage throat opening
of hook, hoist should be taken
out of service.
Check brake for evidence of
slippage under load.
Do not pull on or turn Free
Chaining Knob if hoist is loaded.
Load will release.
All hoists should be visually inspected
before use, in addition to regular, periodic
maintenance inspections.
Inspect hoists for operations warning
notices and legibility.
Deficiencies should be noted and brought
to the attention of supervisors. Be sure
defective hoists are tagged and taken out
of service until repairs are made.
Under no circumstances should
you operate a malfunctioning
hoist.
Check for gouged, twisted,
distorted links and foreign
material. Do not operate Hoists
with twisted, kinked or damaged
chain links.
Load chain should be properly
Choose a hoist with the capacity for the
job. Know the capacities of your hoists and
the weight of your loads. Then match them.
CHOOSE THE RIGHT
HOIST FOR THE JOB...
INSPECT
USE HOIST PROPERLY
PRACTICE CAUTION
ALWAYS 5OPERATOR
SERVICE
Be sure the hoist is
solidly held in the
uppermost part of the
support hook arc.
Be sure hoist and load are
in a straight line. Do not
use unless frame and
chain form a straight line
between hooks.
Be sure load is hooked securely.
Do not tip load the hook. Do not
load hook latch. Hook latch is to
prevent detachment of load
under slack chain conditions
only.
Do not operate with frame
resting against any object.
Apply the load gently. Do not
jerk it.
Never use an extension on the
lever! You’re dangerously
overloading the hoist if you exceed
the rated lever pull or if you have to
use a lever extension to lift or pull a
load.
Do not lift co-workers with
a hoist.
Make sure everyone is
clear of the load when you
apply tension.
Do not remove or obscure
operational warning
notices.
CLEANING
Series 637 Lever Hoists should be
kept clean and free of dust, dirt,
moisture, etc., which will in any
way affect the operation or safety
of the equipment.
LUBRICATION
Chain should be properly
lubricated.
AFTER REPAIRS
Carefully operate the hoist before
returning it to full service.
WARNING- DO NOT LIFT PEOPLE
OR LOADS OVER PEOPLE.

CM REPLACEMENT POLICY
All Columbus McKinnon (CM) Series 637 Lever Hoists
are inspected and performance tested proir to shipment.
If any properly maintained hoist develops a performance
problem within one year of shipment, due to materials or
workmanship defecf, as verified by CM, repair or
replacement of the unit will be made to the original
purchaser without charge. This repair/replacement policy
applies only to Series 637 Lever Hoists installed,
maintained and operated as outlined in this manual, and
specifically excludes hoists subject to normal wear, abuse
improper Installation, improper or inadequate
maintenance, hostile environmental effects and
unauthorized repairs/modifications.
We reserve the right to change materials or design
if, in
our opinion, such changes wnl improve our product.
Abuse, repair by
an unauthorized person, or use of non-
CM replacement part3 voids the guarantee and could
lead to dangerous operation. For full Terms of Sale, see
Sales Order Acknowledgment. Also, refer to the back
cover for Limitations of Warranties, Remedies and
Damages, and Indemnification and Safe Operation.
WARNING
IF NOT USED AS DIRECTED, HOIST MAY CAUSE INJURY.
TO AVOID IN.JURY:
USE ONLY AS DIRECTED BELOW.
The Series 637 Lever Hoist is designed for operation at
nominal ambient temperatures of 0 to 1000 F(-18 to 38°c).
Before operating the Series 637 Lever Hoist, familiarize
yourself with the nomenclature shown
in Figure 1.
1.
Free chaining. In this mode, the chain can be pulled
through the hoist in either direction by hand for quick
attacnment to the load.
With no load on the hoist, set the directional lever in
the neutral ("N") position. Pull the free chaining knob
out and rotate counterclockwise until the knob is sitting
on top of the cam guide. In this pOSition, the gap
between the free chaining knob and the lever will be
approximately 5/16"(7.9mm). The internal gearing is
now dis-engaged and the chain can be puTIed through
the hoist
in eitner direction.
A
WARNING
PULLING OUT OR TURNING THE FREE CHAINING KNOB
WITH A LOAD ATTACHED WILL ALLOW THE LOAD TO
RELEASE AND MAY CAUSE INJURY.
TO AVOID IN.JURY:
NEVER PULL OR TURN FREE CHAINING KNOB WHEN THE
HOIST IS UNDER LOAD.
After the chain has been pulled to the proper length,
disengage the free chaining feature by moving dlrec-
tionallever to the "load" position and rotate the free
chaining knob
in the clockwise direction until the knob
engages the cam guide.
In this position, the gap
befween the free cnaining knob and the lever
Will be
approximately 1/16"(1.6mm). Pull the load chain in
either direction to insure the unit is out of the free
chaining mode.
2. Attachment to the load: The CM Series 637 Lever
Hoist can be used
in any position provided it is
rigged to pull in a straignt line from hook to hook. It is
important that the frame is free to swivel on the upper
hook.
lOWER
HOOK_
DIRECTIONAL
LEVER
(
~ END
f)_RING
FREE
CHAINING
KNOB
CAM GUIDE
Figure 1. Series 637 Lever Hoist Parts and Free Chaining
Operation.
A
WARNING
IF THE UNIT IS NOT RIGGED IN A STRAIGHT LINE HOOK
TO HOOK MANNER, AND
IF THE FRAME IS NOT FREE TO
SWIVEL, LEVEL PULL MAY BREAK FRAME AND CAUSE
PHYSICAL INJURYAND LOSS OF LOAD.
TO AVOID IN.JURY:
RIG THE UNIT IN A STRAIGHT LINE HOOK TO HOOK
MANNER AND KEEP FRAME FREE TO SWIVEL -SEE
FIGURE
2.
..
Under no condition should the frame be allowed to
touch the load or bear
on any support when in use as
this might cause bending of the hook or frame and
possible failure. Also, make certain the end ring end of
the chain feeds into the chain guide roller properly.
Twisted chain may become damaged in the liftwheel
and may result in chain breakage. When operating in
limited areas, it is advised that attachments or slings
be used to keep the frame and lever from being
obstructed. Refer to Figure
2.
3. Operation. (See Hoist Safety is up to you and Safety
Procedures): After attachment to the load, take-up the
slack chain per the free chaining instructions. Set the
SLING ...............
UPPER AND LOWER
HOOKS
IN STRAIGHT
LINE. FRAME FREE
TO SWIVEL
/LOAD
SAFE ANGLE PULLING DANGEROUS ANGLE PULLING
Figure 2. Angle Pulling
directional lever to "load" and operate the lever
up and
down and the load will be pulled or tensioned. Shift
the directional lever to "unload" and the load will be
loosened by operating the lever up and down.
4

A
WARNING
Malfunction of unit, rigging slip or loss of footing may cause
user to slip resulting
in injury.
TO AVOID IN.JURY:
Always have a firm and secure footing when using the Series
637 Lever Hoist.
Inspect Hoist -Before each use and at specified
intervals as directed in inspection section.
WARNING
Use as directed above. Failure to do so may cause injury to
you or others.
1. Do not exceed capacity shown on the identification plate.
2. Do not use to lift people or loads over people.
3. Do not use unless the Hoist's frame and chain form a
straight line between hooks.
4. Do not use if the frame is in contact with any object.
5. Do not use if the unit is damaged or malfunctions.
6. Do not use extension on lever. Use hand power only.
7. Do not use if chain is twisted, kinked or damaged.
Safety Procedures
1. The hoist must be kept clean to assure proper
opertion. Before use, check to
be sure the load chain
is clean, that there is no foreign material in the liftwheel
area and that the lever operates freely.
2. When preparing to pull or tension a load, be sure the
attachment to each hook is firmly seated
in the hook
saddle. Avoid off-center loading of any kind, especially
loading
on the tip of the hook.
A
WARNING
ALLOWING THE LOAD TO BEAR AGAINST THE HOOK
LATCH AND/OR HOOK TIP CAN RESULT IN LOSS OF LOAD.
TO AVOID IN.JURY:
DO NOT ALLOW THE LOAD TO BEAR AGAINST THE HOOK
LATCH AND/OR HOOK TIP. APPLY LOAD TO HOOK BOWL
OR SADDLE ONLY.
3. When pulling or tensioning, move the load only enough
to slightly load the unit, then check to
be sure that the
attachments to the hooks and load are firmly seated.
Continue movement only after you are assured the
load is free of all obstructions.
4. Do not load beyond the rated capacity. Overload can
cause immediate failure or cause damage resulting in
future failure, even at less than rated capacity.
5. The hoist has been designed for hand powered
operation
only. Do not use an extension on the lever.
Lever pulls of 35 pounds(15.9Kg.) on the 3/4 ton unit,
40 pounds(18.1Kg.) on the 1-1/2 ton unit, 73
pounds(33.1 Kg.)
on the 3 ton unit and 77
pounds(34.9Kg.)
on the 6 ton unit, will result in
rated capacity on the unit. Any greater pull is an
indication of either an overload or an incorrectly
maintained unit.
A
WARNING
POWER OPERATION MAY CAUSE DAMAGE OR PRE-
MATURE WEAR THAT IN TURN MAY CAUSE A PART TO
BREAK AND ALLOW THE LOAD TO FALL.
TO AVOID IN.JURY:
OPERATE THE HOIST USING HAND POWER ONL Yi
6. Do not use this hoist or any other material handling
equipment for lifting or moving people, or lifting loads
over people.
7. Stand clear of all loads and warn other people of your
intention to move a load
in their area.
8. Do not leave a load on the unit unattended.
9. Do not take up the load chain to the point where the
end ring or lower hook block becomes jammed
against the frame.
10. Read warnings and instructions on the lever before
each use.
11. Do not wrap the load chain around the load and hook
onto itself as a choker chain sling or bring the load
in
contact with the hoist. Doing this will result in the
loss of the swivel effect of the hook which could
result
in twisted chain and a jammed liftwheel. Also,
the chain may be damaged at the hook.
12. Do not hold the load chain while operating the hoist.
Should the hoist not operate properly, serious injury
may occur.
13. Do not operate the hoist unless it is rigged to pull in a
straight line from hook to hook, and the frame is free
to swivel
on the upper hook. Refer to Figure 2.
14. When there is a load on the hoist, do not pull or turn
the free chaining knob. Doing this will allow the
load to be released in a sudden and uncontrolled
manner and may cause injury to you and/or property
damage.
15. Never operate the hoist when flammable materials or
vapors are present. Contact between metal parts
may produce sparks that can cause a fire or
explosion.
16. STAY ALERT! Watch what you are doing and use
common sense.
Do not use the hoist when you are
tired, distracted or under the influence of drugs,
alcohol or medication causing diminished control.
INSPECTION AND MAINTENANCE
INSPECTION
To maintain continuous and satisfactory operation, a
regular inspection procedure must be initiated so that
worn or damaged parts can
be replaced before they
become unsafe. The intervals of inspection must
be
determined by the individual application and are based
upon the type of service to which the hoist
is subjected.
The intervals indicated below are based
on normal
service.
The inspections are divided into two general
classifications designated as "frequent" and "periodic".
Frequent Inspections
These inspections are usually visual examinations by the
operator. Frequent inspections are to
be performed daily
or before each use and they are to include:
a. Braking mechanism for evidence of slippage.
S
b. Operation of the directional lever for free movement.
c. Load chain for lubricant, wear, damaged links or
foreign material.
d. Hooks for damage, cracks, twists, latch engagement
and latch operation.
Periodic Inspections
These are visual inspections of external and internal
conditions by a designated person making records to
provide the basis for continuing evaluation of the
condition of the tool. The periodic inspection should
include those items listed under frequent inspection as
well as the following:
a. Chain for excessive wear or stretch (see page 6)
every three months.
b. Worn, cracked or distorted parts such as lower hook
block, upper hook block, upper hook pin, chain guide
roller, stripper, side plates, gear cover, gears,
bushings, lever, brake cover, free chaining knob,
ratchet hub pawl, cam guide, friction hub and lever
ratchet hub -every three months.
c. Inspect for wear on the tip of the pawls, teeth of the
ratchet, and pockets of the liftwheel -every three
months.

d. Loose or missing bolts, nuts, pins or rivets -every
three months.
e. Inspect the brake components for worn, glazed or
contaminated friction discs and scoring of the friction
hub and ratchet. Replace friction washers if
contaminated, glazed or if thickness is less than 0.059
in. (1.5 mm) -every three months.
f. Corroded, stretched or broken pawl springs, ratchet
hub pawl spring and pinion spring -every three
months.
g. Hooks -dye penetrant, magnetic particle or other
suitable crack detecting inspection should be
performed at least once a year, if external conditions
indicate there has been unusual usage.
h. Capacity/Warning label for legibility and retension -
every three months.
i. Load chain end ring in place and properly secured -
every three months.
Any deficience should
be corrected before the hoist is
returned to service. Also, the external conditions may
show the need for more detailed inspection which,
in turn,
may require the use of non::!8structive type testing.
Any parts deemed unserviceable are to be replaced with
new parts before the hoist is returned to service. It is very
important that the unserviceable parts be destroyed and
properly disposed of to prevent their possible future use as
a repair item.
When the unit is subjected to heavy usage or dusty, gritty
moist or corrosive atmospheric conditions, shorter time
periods must be assigned. Inspection must be made of all
parts for unusual wear, corrosion or damage, in addition to
those specifically mentioned
in the schedule.
HOOK INSPECTION
Hooks damaged from chemicals, deformations or cracks,
or that have more than a 100 twist from the plane of the
unbent hook or excessive opening or seat wear, must be
replaced. Also, hooks that are opened to the extent that
the latch does not engage the tip must be replaced. See
Figure 3.
t
To measure throat
opening depress
latch against hook
body.
Hoist
Capacity
(Tons)
%
1-if
3
6
Figure
3. Hook Inspection
Replace Hook
When Opening
Is Greater Than:
HI" in.(26.2mm)
1-%, in.(32.5mm)
1-% in.(44.4mm)
Hi in.(47.6mm)
Any hook that is twisted or has excessive throat opening
indicates abuse or overloading of the hoist. Other load
sustaining parts should be inspected for damage.
Check to assure the latch is not damaged or bent and that
it operates properly. It should have sufficient spring
pressure to keep
it tightly against the tip of the hook and
allow it to spring back to the tip when released. If the latch
does not operate properly, replace it.
The chart of Figure 3 should be used to determine when
the hook must be replaced.
LOAD CHAIN
Cleaning
and Inspection
First clean the load chain with a non-acid, non-caustic type
solvent, as exposure to some solvents may damage the
chain. Slack the chain and make a link-by-link inspection
for nicks, gouges, twisted links and excessive wear or
stretching. Severely nicked, gouged, twisted worn or
stretched chain should be replaced.
To determine if the chain is worn or stretched beyond
serviceable limits, check the gage length as indicated in
Figure 4. When measuring the gage length, the chain
should be clean, free of twists and pulled taut. If the gage
length exceeds the maximum length allowed listed in
Figure
4, it must be replaced.
~~ 1
~,.:;:,
NUMBER OF GAGE
LINKS IN GAGE LENGTH
@------L-l
Hoist Dia. of No. of Max. Length
Capacity Chain Link Allowable.
(Tons) Stock
To Gage Used Chain
% .236 in.(6mm)
11
8-
1
)1" in(212.0mm)
1-/f
.281 in.(7mm)
11
9-'%, in.(246.9mm)
3&6 .394 in.(10mm) 11
13-'%, in.(353.2mm)
Figure
4. Gaging Chain Wear
A
WARNING
USING OTHER THAN CM SUPPLIED LOAD CHAIN MAY
CAUSE THE CHAIN TO JAM IN THE HOIST AND/OR
ALLOW THE CHAIN TO BREAK AND THE LOAD TO DROP.
TO AVOID IN.JURY:
DUE TO SIZE REQUIREMENTS AND PHYSICAL
PROPERTIES, USE ONLY HOISTALOY LOAD CHAIN IN
THE SERIES 637 LEVER HOIST.
Also, these chains are specially heat treated and
hardened and should ne'/er be repaired.
IMPORTANT: Do not use replaced chain for other
purposes such as lifting or pulling. Load chain may
break suddenly without visual deformation. For this
reason,
cut replaced chain into short lengths to
prevent use after disposal.
Before returning a chain to service, lubricate liberally with
Lubriplate®, Bar and Chain Oil 10-R (Fiske Bros. Refining
Co.) or equal lubricant. Remove excess lubricant from the
chain by wiping with a cloth.
LUBRICATION
A
WARNING
The lubricants used in and recommended for the Series 637
Lever Hoist may contain hazardous materials that mandate
specified handling and diposal procedures.
TO AVOID CONTACT AND CONTAMINATION:
Handle and dispose of lubricants only as directed in applicable
material safety data sheets and in accordance with applicable
local, state and federal regulations.
Lubricate the load chain with a light coat of Lubriplate®,
Bar and Chain Oil 10-R (Fiske Bros. Refining Co.) or equal
lubricant. Be sure the lubricant reaches the bearing
surfaces between the links. Remove excess oil from the
chain. A
WARNING
Used motor oils contain known carcinogenic materials.
TO HEALTH PROBLEMS:
Never use used motor oils as a chain lubricant. Only use
Lubriplate® Bar and Chain Oil 1 O-R as a lubricant for the load
chain.
6

7
The Hoist normally requires no additional lubrication except
when it has been disassembled for cleaning or repairs.
The brake is designed to operate dry. Do not use any
grease or lubricant on the braking surfaces. When
lubricating parts adjacent to the brake, do not use an
excessive amount
of lubricant which could seep onto
the brake surfaces.
A
WARNING
Using any grease or lubricant on the braking surfaces will cause
hrake slipage and loss of load control which may result
in injury
and/or property damage.
TO AVOID INJURY:
Do not use any grease or lubricant on braking surfaces. The brake
is designed to operate
dry.
When the hoist is disassembled for cleaning or repairs, the
following locations should be lubricated with approximately
one oz. per hoist of Molykote BR-2-S (Dow Corning),
Molytex #2 (Texaco) or Topmoly (Topsail) grease or equal
lubricant: gears, bearing balls of upper and lower hooks,
upper hook pin, rollers of the liftwheel bearing (1-1/2 thru 6
ton units), inside of chain guide roller, exterior of pinion
shaft, surface of ratchet hub pawl, surfaces of frame
bushings, surface of cam guide and gear cover bushings.
Be sure to thoroughly clean the old grease from these parts
before re-Iubricating.
To assure extra long life and top performance, be sure
to lubricate the various
parts of the hoist using the
lubricants specified above. If deSired, these lubricants
can be purchased from eM.
DISASSEMBLY AND
ASSEMBLY INSTRUCTIONS
The exploded views and parts list on pages 9 and 10 show
the general arrangement and nomenclature of the parts of
the Series 637 Lever Hoist. These should be used when
disassembling and re-assembling the units so that all parts
are properly installed.
Disassembly
Four points of caution to be observed upon disassembly of
the tool are:
1. Loose rollers are used for the liftwheel bearing on the 1-
1/2, 3 and 6 ton units (refer to parts list for number
required). Care must be taken so
as to not lose or
misplace these rollers since they may drop from the unit
as the various parts are disassembled.
2. The latch is secured to the hook (upper and lower) by a
rivet.
To remove the latch, it is necessary to remove the
head of the rivet by grinding or drilling. For replacement
of the latch, refer to paragraph 4 under assembly
instructions.
3. On the 3/4, 1-1/2 and 3 ton units, the upper and lower
hook blocks contain loose ball bearings and care must
be taken
so as to not lose or misplace these upon
disassembly. The number of ball bearings in the u~per
and lower hook blocks are as follows:
Capacity
Tons
3/4
1-1/2
3
No. of Bearings
Balls
9
13
15
These bearing balls are retained in the upper and lower
hook blocks by a set screw that is located under the
retainer spring.
To expose the set screw, work the spring,
one coil at a time,
on to or off of the hook body.
Similarly, 17 bearing balls are used to support the lower
hook on the 6 ton unit. These are retained in the hook
trunnion by a set screw
in the end of the trunnion shaft.
4. The pinion shaft and ratchet hub pawl and
shaft are under spring pressure and these may
fly out of the unit upon disassembly.
Assembly:
Consideration must be given to the following when
assembling the unit:
1. Assemble the brake components as shown in Figure 5.
The ratchet teeth must face as shown and engage the
pawls.
RATCHET----'I [-
FRICTION '- LJ,/
HUB--......J. V
FRICTION DISC
Figure 5. Brake Component Assembly
On the lever, set the directional lever in the neutral ("N")
position. Making sure that the friction disc is centered on
the friction hub, thread the friction hub into the lever ratchet
hub
in the lever assembly and firmly hand tighten.
Assemble the cam guide (with the "ears" projecting away
from the lever) onto the splined portion of the friction hub
so
that the cam guide fits into one of the three recessed
portions of the lever ratchet hub and
so the clearance at "A"
is slightly smaller than the clearance at "B". Refer to Figure
6.
A
B-~:...J...h
CLEARANCE AT A
MUST BE SLIGHTLY
SMALLER THAN
CLEARANCE
AT B.
II+-+---CAM GUIDE
Figure 6. Cam Guide Installation
The friction hub must be firmly tightened into the lever
ratchet hub before the cam guide is set.
If the clearance at "A" is extremely small, the tool will
be hard to operate in the unload direction. If the
clearance
at "8" is extremely small the brake will slip
and the tool will not hold the load in suspension.
After making sure that the cam guide is properly
assembled to the lever ratchet hub, spring back the
pawls and assemble the brakellever assembly onto
the pinion shaft and then release the pawls so that
they engage the teeth of the ratchet. Place the free-
chaining knob over the cam guide and secure using
the brake nut, washer and pin.
2. For proper operation, 37 (for the 1-1/2 ton unit) or 24
(for the 3 & 6 ton units) rollers must be installed for the
liftwheel bearing. Applying grease, Molykote BR-2-S
(Dow, Corning Corp.), to the rollers will help hold them
in position during assembly.

3. To insure proper loading of upper and lower hooks on
the 3/4, 1-1/2 and 3 ton tools, the correct number of
bearing balls
(9 on the 3/4 ton unit, 13 on the 1-1/2 ton
unit and
15 on the 3 ton unit) must be installed in the
upper and lower hook blocks.
On the 6 ton unit, 17
bearing balls must
be installed in the lower hook
trunnion. Apply grease (Molykote BR-2-S, Dow
Corning Corp.) to the bearing balls and feed them into
the small hole
in the hook block (3/4,1-1/2 and 3 ton
units) or
in the end of the trunnion shaft (6 ton unit).
To retain the bearing balls and to allow the hook to
rotate freely, thread the set screw into the hole and
tighten firmly. Then, back off the set screw 1 to 1-1/2
turns.
On the 3/4, 1-1/2 and 3 ton units, be sure to
replace the retainer spring
in the recess provided for
same
in the hook block.
4. When assembling the latch to hook, the end of the
rivet must
be peened over. When peening over the
rivet, only apply enough force to form a head to retain
the pin. Excessive force will deform the latch and
make the latch inoperablo.
5. Gearing: When assembling the gears, they must be
orientated with the timing marks aligned as shown in
Figure 7.
~
TON
Reeving
Tli ... ING
MARKS
Figure 7. Gear Timing Marks
3/4,1-112 And 3 Ton Units
l1h. 3 & 6
TON
To install a new length of load chain, it is necessary to
disengage the old chain from the lower hook block.
To do
this, work the retainer spring, one coil at a time,
on to or
off of the hook body. Remove the chain pin to allow the
hook block to
be removed from the chain. Arrange the
tool for free chaining (see page
4) and pull the old chain
through the unit. Disengage the free chaining feature and
then set the directional lever to neutral (N). Start
an
upstanding link of the replacement load chain into the
hook side of the tool and between the chain guide roller
and the liftwheel with the weld side of the upstanding links
facing away from the liftwheel. Refer to Figure
8.
CHAIN GUIDE
ROLLER·LOWER
HOOK SIDE
STRIPPER-,.."..,---=- ......
LOWER
HOOK BLOCK-
Figure 8. Reeving-3/4, 1-1/2 and 3 Ton
Continue to feed the chain in to the hoist while turning the
free chaining knob clockwise.
Be sure to guide the chain
between the liftwheel and chain guide roller
on the end
ring side of the tool as shown
in Figure 8. Continue to
rotate the free chaining knob and pull
on the loose end of
the chain until a convenient length of chain has been
passed through the unit. Assemble the end ring to the
free end of the chain
by rotating the last link 1/4 turn and
passing the ends of the ring through the link as shown
in
Figure 8. Hammer the ends of the ring together to secure
it to the chain. Insert the last link of chain
on the hook
block side of the tool into the recess
on top of the hook
block.
To secure the chain, slide the chain pin through
the hook block and the last link of chain. Slide the
retainer spring up the hook block until it snaps into the
recess for same, to secure the chain pin.
6 Ton Unit
To install a new length of load chain, it is necessary to
disengage the old chain from the upper hook hanger by
removing the dead end bolt, nut and cotter
pin. Then pull
the old chain through the lower hook block. Arrange the
tool for free chaining (see page
4) and pull the old chain
through the unit. Disengage the free chaining feature and
then set the directional lever to neutral
(N). Make sure
that the
new, replacement chain has an odd number of
links. Start
an upstanding link of the replacement load
chain into the hook side of the unit and between the chain
guide roller and liftwheel, with the weld side of the
upstanding links facing away from the liftwheel. Refer to
Figure
9.
CHAIN GUIDE
ROLLER-END _ 0
RING SIDE
STRIPPER
END
RING
Figure 9. Reeving - 6 Ton
Feed the chain into the hoist while rotating the free
chaining knob clockwise.
Be sure to guide the chain
between the liftwheel and the chain guide roller
on the end
ring side of the tool as shown
in Figure 9. Continue to
rotate the free chaining knob and pull
on the loose end of
the chain until a convenient length of chain has passed
through the unit. Assemble the end ring to the loose end
of the chain
by rotating the last link 1/4 turn and passing
the ends of the ring through the link as shown
in Figure 9.
Hammer the ends of the ring together to secure it to the
chain. Place the hoist
in a vertical position by supporting it
from the upper hook. Remove any twists from the chain
and feed it through the lower hook block and around the
lower sheave. Making sure there are
no twists in the
chain, attach the last link of the chain to the hanger using
the dead end bolt, nut and cotter pin.
8

9
A
WARNING
Failure to properly install the load chain between chain guide rollers
and liftwheel may cause the chain to lift out of the liftwheel pockets
and allow the load to drop.
TO AVOID INJURY:
Feed load chain between liftwheel and chain guide, as shown in
Figures 8 & 9.
RECOMMENDED SPARE PARTS
To insure continued operation, it is recommended that two
friction washers (Key
No. 637-12) for each eM Series 637
Lever Hoist
in service, be kept on hand at all times to
replace friction washers that are worn, contaminated or
glazed. See Page 10 for ordering information.
PREVENTATIVE MAINTENANCE
In addition to the inspection procedures, a preventative
maintenance program should be established to prolong the
useful life of the hoist and maintain its dependability and
continued safe use. The program should include the
periodic inspections with particular attention being paid to
the lubrication of various components using the
recommended lubricants.
TESTING
Prior to initial use, all altered or repaired hoists or used
hoists that have not been operated for the previous 12
months shall be tested by the user for proper operation.
Test the unit first
in the unloaded state and then with a light
load of 100 pounds(45Kg.) times the number of load
supporting parts of load chain to be sure it operates
properly and the brake holds the load when the lever is
released; then test with a load of 125% of rated capacity.
In aduition, hoists in which load sustaining parts have been
replaced must be tested with 125% of rated capacity by or
under the direction of a designated person and a written
report prepared for record purposes.
NOTE: For additional information on inspection and
testing refer to ASME B30.21 "Manually Lever Operated
Hoists" obtainable from ASME Order Department, 22
Law Drive,
Box 2300, Fairfield, NJ 07007-2300, U.S.A.
3/4, 1.1/2, 3 and 6 Ton Series 637 Lever Hoist Parts List
Key No.
Part Number
No. Req'd Part Name
3/4 Ton 1-1/2 Ton 3 Ton 6 Ton
Side Plate Assembly (Gear Side).
637-1 1
Includes 3 Bushings, 4 Studs. 37760C 37733C 37794C 37794C
Liftwheel and Liftwheel Gear.
Side Plate Assembly (Brake Side). Includes
637-2 1 Bushing and Pawl Studs on 3/4 Ton Unit. 37761C
37734C 37795C 37795C
Includes Bearing Race and 2 Pawl Assemblies
on 1-1/2, 3 and 6 Ton Units.
637-3 2 Pawl with Sprinq and Retainer Rinq
37762C
- - -
637-4 1
Stripper
37763C 37735C
37796C 37796C
637-5 1
Gear Set (Includes 2 Gears) 37764C 37736C 37797C 37797C
637-6 1 Sprinq with Seat 37765C 37737C
37798C 37798C
637-7 1
Pinion Shaft 37711C 37738C 37799C 37799C
637-8 1 Gear Cover 37712C
37739C 37800C 37800C
637-9 1 Gear Cover Hardware Set. Includes 4 Nuts
and 4 Lockwashers. 37713C 37740C
37801C 37801C
637-10 2
Chain Guide Roller 37714C 37741C 37802C 37802C
637-11 1 Friction
Hub 37715C 37742C
37803C 37803C
637-12 2 Friction Disc
37716C 37743C 22869
22869
637-13 1
Ratchet 37717C 37744C
37805C 37805C
Brake Cover for 3/4 Ton Unit or Lever
637-15
1 Ratchet Hub, Brake Cover and Lever Rear 37718C 37745C
37806C 37806C
Half Assembled for 1-1/2, 3 and 6 Ton Units.
Brake Cover Hardware Kit, Includes
637-16 1 4 Nuts and 4 Lockwashers.
37719C 37746C 37807C 37807C
Lever Hardware Kit. Includes 4 Screws and
637-17 1 3
Lockwashers for the 3/4 Ton Unit. Includes 37720C 37747C 37747C 37747C
2 Screws. 2 Nuts and 4 Lockwashers
for the 1-1/2 3 and 6 Ton Units.
637-18 1
Lever Assembly, Front Half includes Directional Lever 37721C
37748C 37748C 37748C
637-19 1 Lever Assembl
Rear Half 37722C
- -
637-20
1 Cam Guide 37723C
37749C 37749C 37749C
637-21 1 Free Chaining Knob
37724C 37750C 37750C 37750C
637-22
1 Lever Ratchet Hub 37725C
-
637-23 1
Brake Nut, Washer and Cotter Pin 37726C 37751C 37751C 37751C
637-24 1
Ratchet Hub Pawl Kit. Includes Pawl, 37727C
37752C 37752C 37752C
Sprina and Shaft.
637-25
1 Lever Grip
37728C 37753C 37753C 37753C
Upper Hook Assembly. Includes Hook, Latch,
Bearing Balls, Set Screw, Retainer Spring and
637-26 1 Hook Block for 3/4,1-1/2 and 3 Ton Units.
37729C 37754C 37815C
37820C
Includes Hook, Latch, Hanger, Dead End Bolt,
Nllt "no r.nttAr Pin 1m R Tnn llnit
637-27 1
Upper Hook Pin
37730C 37755C 37816C 37816C
Lower Hook Assembly. Includes Hook, Latch,
Bearing Balls, Set Screw, 2 Retainer Springs,
637-28 1 Chain Pin and Hook Block for 3/4,1-1/2
37731C 37756C 37817C 37821C
and 3 Ton Units. Includes Hook, Latch, Bearing
Balls, Set Screw, 4 Retaining Rings, Sheave,
Rollers Sheave Shaft and Hook Block for 6 Ton Unit.
637-29 2 Hook Latch Kit
37732C 37757C 37818C
37822C
637-30 1
Load Chain End Rinq 40471 40471
37823 37823
637-31 1
Load Chain, Specify Length Required. 85959 85961
85960 85960
637-32 1
Capacity/Warning Label 37701C
37702C 37782C 37783C
Bearing Kit. Includes 37 Rollers and Inner Ring
637-33 1
for 1-1/2 Ton Unit. Includes 24 Rollers and
- 37758C 37819C 37819C
Inner Ring for 3 and 6 Ton Units.

637-27
637-9
637·8
ORDERING INFORMATION: When corresponding or
ordering repair parts always provide:
1) Hoist Capacity and 2)
Serial Number (Stamped on Capacity/Warning Label.) For
parts orders also specify: Key Number of part, part name and
637-26 -,~ number, and quantity desired. When ordering parts consider
, ~ replacing bearings, fasteners, etc. that may be damaged or
A 637-5
637-29-- 637-27 lost during disassembly or have deteriorated because of age
j!
, ~37-1 -or service. Parts should be ordered from CM's
, !...: 637-7 637-6 ~' ~ /637-10 Master Parts Depots. To locate the Master Parts
~ ~ ~ [\ 1 i"@ ;:;3 ~:~(~~~)~~~_~~~4~all [phone] or
~ ~ , " ~~ \ 637.13 637-15
~ -' ','2 " ~ I _ 637·11 637·19
f7;:, -r (I:,. ,,) '" r fQ ,,,;,;;.. 637-17
~ \ \ 637-2 t, 4~'63,:._20. 637·21
637-30
,~~ '~Ij(3~
! 637-23 'Xi
~
637-3 637-12 637-16 ""/ ~
6 Ton Upper Hook
637-29
>'637-26
rj
637-29 637-32
~ 637-28 637-18
%Ton Lever Hoist
r~'~
A
WARNING
USING "COMMERCIAL" OR OTHER MANUFACTURER'S PARTS TO
REPAIR THE SERIES 637 LEVER HOIST MAY CAUSE LOAD LOSS.
TO AVOID INJURY:
USE ONLY CM SUPPLIED REPLACEMENT PARTS. PARTS MAY
LOOK ALIKE BUT CM PARTS ARE MADE OF SPECIFIC MATERIALS
OR PROCESSED TO ACHIEVE SPECIFIC PROPERTIES.
637-28
Exploded Views -Series 637
Manually Operated Lever
Hoists.
~ 637-5 ' .
... ~~~
It/!t),
1 ~, 3 And 6 Ton Lever Hoists
.. 1)0 & 3 Ton Lower Hook
PART NUMBERS FOR PACKAGED LUBRICANTS
Used in the CM Series 637 Lever Hoist
(Refer to page 6 for Lubrication Instructions)
Lubricant Type of
Part Numbers and Packaged
Usage Lubricant Quantities of Lubricants
Gears, Rollers Grease (Molykote BR-2-S
28606 - 1/2 Ib.(.23Kg.) can
of Liftwheel and
or Equal)
28618 - 1 Ib.(.46Kg.) can
Gear Bearings
Pawl Stud
Oil (WD-40 or Equal)
Obtain locally-not stocked
byCM
Load Chain
Oil (Lubriplate Bar and
28608 - 1 pint (.5L) can
Chain Oil 10-R or Equal)
28619 - 1 gal.(3.8L) can
637-18
/
I
637-23
637-25
10

© 2000 Columbus McKinnon Corp. Printed in USA
Columbus McKinnon Corporation • Industrial Products Division • 140 John James Audubon Parkway
Amherst, New York 14228-1197 • 1-800-888-0985 • Fax [phone]
®
Note: When ordering parts, always furnish rated load and serial number of hoist on
which the parts are to be used.
For the location of the nearest eM Master Parts Depot, call [phone] or FAX
(71 6) 689-5644.
LIMITATION OF WARRANTIES, REMEDIES AND DAMAGES
THE WARRANTY STATED BELOW IS GIVEN IN PLACE OF ALL
OTHER WARRANTIES, EXPRESS OR IMPLIED, OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
OR OTHERWISE, NO PROMISE OR AFFIRMATION OF FACT
MADE BY ANY AGENT OR REPRESENTATIVE OF SELLER
SHALL CONSTITUTE A WARRANTY BY SELLER OR GIVE RISE
TO ANY LIABILITY OR OBLIGATION.
Seller warrants that on the date of delivery to carrier the goods
are free from defects in workmanship and materials.
SELLER'S SOLE OBLIGATION IN THE EVENT OF BREACH OF
WARRANTY OR CONTRACT OR FOR NEGLIGENCE OR
OTHERWISE WITH RESPECT TO GOODS SOLD SHALL BE
EXCLUSIVELY LIMITED TO REPAIR OR REPLACEMENT, EO.B.
SELLER'S POINT OF SHIPMENT, OF ANY PARTS WHICH
SELLER DETERMINES TO HAVE BEEN DEFECTIVE or if Seller
determines that such repair or replacement is not feasible, to a
refund of the purchase price upon return of the goods to Seller.
Any action against Seller for breach of warranty. negligence or
otherwise, must be commenced within one year after such
cause of action accures.
NO CLAIM AGAINST SELLER FOR ANY DEFECT IN THE
GOODS SHALL BE VALID OR ENFORCEABLE UNLESS
BUYER'S WRITTEN NOTICE THEREOF IS RECEIVED BY
SELLER WITHIN ONE YEAR FROM THE DATE OF SHIPMENT.
Seller shall not be liable for any damage, injury or loss arising
out of the use of the goods if, prior to such damage, injury or
loss, such goods are (1) damaged or misused following Seller's
delivery to carrier; (2) not maintained, inspected, or used in
compliance with applicable law and Seller's written
instructions and recommendations; or (3) installed, repaired,
altered or modified without compliance with such law,
instructions or recommendations.
UNDER NO CIRCUMSTANCES SHALL SELLER BE LIABLE
FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES AS THOSE
TERMS ARE DEFINED IN SECTION 2-715 OF THE UNIFORM
COMMERCIAL CODE.
INDEMNIFICATION AND SAFE OPERATION
Buyer shall comply with and require its employees to comply
with directions set forth in instructions and manuals furnished
by Seller and shall use and require its employees to follow
such instructions and manuals and to use reasonable care in
the use and maintenance of the goods. Buyer shall not remove
or permit anyone to remove any warning or instruction signs
on the goods. In the event of personal injury or damage to
property or business arising from the use of the goods, Buyer
shall within 48 hours thereafter give Seller written notice of
such injury or damage. Buyer shall cooperate with Seller in
investigating any such injury or damage and in the defense of
any claims arising therefrom.
If Buyer fails to comply with this section or if any injury or
damage is caused, in whole or in part, by Buyer's failure to
comply with applicable federal or state safety requirements,
Buyer shall indemnify and hold Seller harmless against any
claims, loss or expense for injury or damage arising from the
use of the goods.
A
WARNING
ALTERATIONS OR MODIFICATIONS OF EQUIPMENTAND
USE OF NON·CM REPAIR PARTS CAN LEAD TO
DANGEROUS OPERATION AND INJURY.
TO AVOID IN.JURY:
-DO NOT ALTER OR MODIFY EQUIPMENT
-DO USE ONLY CM PROVIDED REPLACEMENT PARTS.