Thern M4022, M4022PB, M4032, M4032PB, M4042PBSS, M4312, M4312PB, M4312PBSS, M4412, M4412PB Spur Gear Hand Winch Owner's Manual

Read this Own er’s Man u al thor ough ly be fore op er at ing the equip ment. Keep it with the equip ment at all times.

Re place ments are avail able from Thern, Inc., PO Box 347,

Winona, MN 55987,

507-454-2996.

www.thern.com

IMPORTANT: Please record product information on page 2. This information is re quired when calling the fac to ry for service.

A8097G-0613

Owner’s Man ual

For Thern

Spur Gear Hand Winches

page 2 Owner's Manual for Thern Spur Gear Hand Winches

Two-Year Limited Warranty

Please record the following:

Date Purchased:

Model No.:

Code No.:

This information is required when calling the factory for service.

Thern, Inc. warrants its products against defects in material or workmanship for two years from the date of purchase by the original using buyer, or if this date cannot be established, the date the product was sold by Thern, Inc. to the dealer. To make a claim under this warranty, contact the factory for an RGA number. The product must be returned, prepaid, directly to Thern, Inc., 5712 Industrial Park Road, Winona, Minnesota 55987. The following information must accompany the product: the RGA number, the date of purchase, the description of the claimed defect, and a complete explanation of the circumstances involved. If the product is found to be defective, it will be repaired or replaced free of charge, and Thern, Inc. will reimburse the shipping cost within the contiguous USA.

This warranty does not cover any damage due to accident, misuse, abuse, or negligence. Any alteration, repair or modifi cation of the product outside the Thern, Inc. factory shall void this warranty. This warranty does not cover any costs for removal of our product, downtime, or any other incidental or consequential costs or damages resulting from the claimed defects. This warranty does not cover brake discs, wire rope or other wear components, as their life is subject to use conditions which vary between applications.

FACTORY AUTHORIZED REPAIR OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE

EXCLUSIVE REMEDY TO THE CONSUMER. THERN, INC. SHALL NOT BE LIABLE FOR ANY INCIDEN-

TAL OR CONSEQUENTIAL DAMAGES FOR BREACH OF ANY EXPRESS OR IMPLIED WARRANTY ON

THIS PRODUCT. EXCEPT TO THE EXTENT PROHIBITED BY APPLICABLE LAW, ANY IMPLIED WAR-

RANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ON THIS PRODUCT IS

LIMITED IN DURATION TO THE DURATION OF THIS WARRANTY.

Some states do not allow the exclusion or limitation of incidental or consequential damages, or allow limitations on how long an implied warranty lasts, so the above limitation or exclusion may not apply to you. This warranty gives you specifi c legal rights, and you may also have other rights which vary from state to state.

Note: Thern, Inc. reserves the right to change the design or discontinue the production of any product without prior notice.

About This Manual

The Occupational Safety and Health Act of 1970 states that it is the employer’s re spon si bil i ty to provide a workplace free of hazard. To this end, all equipment should be installed, operated, and maintained in compliance with applicable trade, industrial, federal, state, and local regulations. It is the equipment own er's re spon si bil i ty to ob tain copies of these regulations and to determine the suit abil i ty of the equip ment to its intended use.

This Owner’s Manual, and warning labels attached to the equip ment, are to serve as guidelines for hazard-free installation, op er a tion, and maintenance. They should not be understood to prepare you for every pos si ble situation.

The information contained in this manual is applicable only to the Thern Spur

Gear Hand Winches. Do not use this manual as a source of in for ma tion for any other equip ment.

The following symbols are used for emphasis throughout this man u al:

Failure to follow ‘WARNING!’ instructions may result in equipment dam age, property damage, and/or serious personal injury.

Failure to follow ‘CAUTION!’ instructions may result in equipment damage, prop er ty damage, and/or minor personal injury.

Important!

Failure to follow ‘important!’ instructions may result in poor per for mance of the equipment.

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Owner's Manual for Thern Spur Gear Hand Winches

Suggestions for Safe Operation

page 3

DO the following:

Read and comply with the guidelines set forth in this Owner’s Manual. Keep this manual, and all labels attached to the winch, readable and with the equip-

ment at all times. Contact Thern, Inc. for replacements.

Check lubrication before use.

Install the wire rope securely to the winch drum.

Keep at least 4 wraps of wire rope wound on the drum at all times, to serve as anchor wraps. With less than 4 wraps on the drum the wire rope could come loose, causing the load to escape.

Keep hands away from the drum, gears, wire rope, and other moving parts of the equipment.

Keep all unnecessary personnel away from winch while in operation. Keep out of the path of the load, and out of the path of a broken wire rope that might snap back and cause injury.

DO NOT do the following:

Do not lift people, or things over people. Do not walk or work under a load or in the line of force of any load.

Do not exceed the load rating of the winch or any other component in the sys tem. To do so could result in failure of the equipment.

Do not use more than one winch to move a load that unless each winch was designed for use in a multiple winch system.

Do not operate with other than manual power.

Do not use damaged or malfunctioning equipment. To do so could result in fail ure of the equipment.

Do not modify the equipment in any way. To do so could cause equipment fail ure.

Do not wrap the wire rope around the load. This damages the wire rope and could cause the load to escape. Use approved rigging connectors to secure the wire rope to the load.

Do not operate the winch with guards removed or improperly installed.

Do not divert your attention from the operation. Stay alert to the possibility of accidents, and try to prevent them from happening.

Do not jerk or swing the load. Avoid shock loads by starting and stopping the load smoothly. Shock loads overload the equipment and may cause damage.

Do not lift loads or pull loads on an incline unless the winch is equipped with a brake.

Do not leave a suspended load unattended unless specifi c precautions have been taken to secure the load and keep people away from the winch and out from under the load.

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page 4 Owner's Manual for Thern Spur Gear Hand Winches

1.1

Installing the Winch

Important!

• Inspect the winch immediately following installation according to the Instructions for Periodic

Inspection. This will give you a record of the condition of the winch with which to compare future inspections.

• A qualifi ed professional should inspect or design the foundation to insure that it will provide adequate support.

• Locate the winch so it will be visible during the entire op er a tion.

• Do not weld the winch frame to the foundation or support structure. Welding the frame may void warranty, contact Thern, Inc. Use fasteners as instructed.

Do not install the winch in an area defi ned as hazardous by the National Elec-

tric Code, unless installation in such an area has been thoroughly ap proved.

Do not install the winch near corrosive chemicals, fl ammable materials, ex-

plo sives, or other elements that may damage the winch or injure the op er a tor.

Ad e quate ly protect the winch and the operator from such elements.

Position the winch so the operator can stand clear of the load, and out of the path of a broken wire rope that could snap back and cause injury.

Attach the winch to a rigid and level foundation that will support the winch and its load under all load conditions, including shock loading.

Install the wire rope securely to the winch drum. A poorly secured wire rope could come loose from its anchor and could release the load. See Figure 3.

Important!

• Use a sheave or roller guide to direct the wire rope to the drum whenever possible.

• Install sheaves, tracks and other equipment so they will remain fi xed under all load conditions.

Follow the recommendations of the equipment manufacturer.

• Use sheaves of proper diameter to minimize wear on the wire rope. Follow the recommendations of the sheave manufacturer.

1.1.1

1.1.2

1.1.3

CONSULT APPLICABLE CODES AND REGULATIONS for specifi c rules on installing the equipment.

LOCATE THE WINCH in an area clear of traffi c and obstacles that could interfere with operation. Make sure winch is accessible for maintenance and operation.

MAINTAIN A FLEET ANGLE between 1/2 and 1-1/2 degrees. The proper fl eet angle minimizes wire rope damage by helping the wire rope wind uni form ly onto the drum. See Figure 1.

1.1.4

FASTEN THE WINCH securely to the foundation. a

FOR STANDARD PRODUCTS referred to in this manual, use 3/8 inch coarse thread fasteners, grade 5 or better. Torque for grade 5 fasteners without lubrication is 30 ft. lb. Make sure mounting holes are secured to a solid foundation able to support the winch and the load under all conditions with design factors based on accepted engineering practices. b

NON-STANDARD PRODUCTS that vary from the original design may have different fastening requirements. Contact a structural engineer or

Thern, Inc. for this information.

TO COMPLY WITH LOCAL CODES, CONTACT A QUAL I FIED

PRO FES SION AL TO OBTAIN PROPER STRUCTURE OR FOUN DA TION

SPEC I FI CA TIONS FOR THE MOUNTING OF THERN PROD UCTS.

Figure 1 – Maintaining the Fleet Angle

When wire rope travels over a sheave or through a roller guide – main tain fl eet angle by locating the sheave or guide an appropriate distance from the drum, shown as distance “A”.

smooth drum fi xed sheave or roller 1/2 to 1-1/2 de grees center line guide distance “A”

When wire rope travels directly to the load – maintain fl eet angle by con trol ling side-to-side movement of the load with tracks or guide rails. Allowing the load to move too far to one side causes stress on the drum fl ange which may cause damage.

load smooth drum

1/2 to 1-1/2 de grees center line tracks or guide rails

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Owner's Manual for Thern Spur Gear Hand Winches page 5

1.2

Installing the Handle

1.2.1

FOR MODELS M4022PB, M4032PB, M4042PBSS, M4312PB,

M4312PBSS, and M4412PB equipped with PB Brakes, in stall the handle as fol lows: a

LOOSEN THE THUMBSCREW and slide the han dle to ward the me dal lion as shown. See Figure 2A.

b

LINE UP THE NOTCH in the handle with the point of the hex in the me dal lion. See Figure 2B.

c

SLIDE THE HANDLE AND MEDALLION ASSEMBLY onto the hex drive on the brake until the fl at of the handle lines up with the groove in hex drive.

See Figure 2C.

d

SLIDE THE HANDLE outward away from the medallion to the desired length and tighten the thumbscrew. See Figure 2D.

1.2.2

FOR MODELS M4022 AND M4032, place the handle as sem bly on the handle shaft and secure in place with the lock washer and hex nut.

1.2.3

FOR MODELS M4312 AND M4412, place the handle as sem bly on the drum shaft and install the hair pin cot ter in the end of the drum shaft to hold the handle in place.

Figure 2 – Installing the Handle

2A

loosen thumbscrew and slide handle in direction shown thumbscrew slide

2B

line up notch with point of hex in medallion

2C

notch groove medallion slide handle assembly onto hex drive until handle fl at lines up with groove notch

2D

slide handle out to desired length and tighten thumbscrew slide thumbscrew

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page 6 Owner's Manual for Thern Spur Gear Hand Winches

1.3

Installing the Wire Rope

Important!

• Use wire rope and other rigging equipment rated for the size of the largest load you will be moving.

• Do not drag the wire rope through dirt or debris that could cause damage, or poor operation.

• Always wear protective clothing when handling wire rope.

Install the wire rope so it is wound correctly as shown, or the winch will not work properly, and could release the load.

Install the wire rope securely to the winch drum. A poorly secured wire rope could come loose from its anchor and could release the load.

Figure 3A – Flange Clip

Anchor

drum end view typical installation shown right lay – underwound*

*M4042PBSS is overwound

Wire rope assemblies can be purchased from Thern, Inc.

Figure 3B – Quick

Disconnect Anchor

pull forward to lodge the end stop in the slot drum end view

1.3.1

PURCHASE THE PROPER WIRE ROPE for your application. Keep the following in mind when selecting a wire rope. Contact a repuTable wire rope sup pli er for help.

a

BREAKING STRENGTH of new wire rope should be at least 3 times great er than the largest load placed on the winch. If loads are lifted or pulled on an incline, the breaking strength must be at least 5 times greater than the largest load. These are minimum values and will vary with the type of load and how you are moving it.

b

WIRE ROPE LAY must agree with the winding direction of the drum to help insure proper winding.

c

WE RECOMMEND 7 x 19 galvanized aircraft cable for diameters up to

5/16 inch.

1.3.2

ANCHOR THE WIRE ROPE to the drum using either the fl ange clip or quick disconnect anchor.

a

FLANGE CLIP ANCHOR. See Figure 3A.

• PASS THE END OF THE WIRE ROPE through the hole in the fl ange.

• INSERT THE CARRIAGE BOLT, loop the wire rope around the bolt, and install the clip so the wire rope is held by the curves of the clip.

• INSTALL THE JAM NUT and tighten it until the wire rope is fl attened against the drum fl ange.

b

QUICK DISCONNECT ANCHOR. See Figure 3B.

• PUSH THE END STOP through the large center hole in the drum fl ange.

• PULL THE WIRE ROPE forward to lodge the end stop in the slot.

1.3.3

TURN THE HANDLE CLOCKWISE to wind wire rope onto the drum. If wire rope unwinds from the drum when the han dle is rotated clock wise, the wire rope is installed incorrectly. Install the wire rope correctly before

con tinu ing.

1.3.4

WIND FOUR FULL WRAPS of wire rope onto the drum by operating the winch while holding the wire rope taught. These wraps serve as anchor

wraps and must remain on the drum at all times.

typical installation shown right lay – underwound*

*M4042PBSS is overwound

Wire rope assemblies can be purchased from Thern, Inc.

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Owner's Manual for Thern Spur Gear Hand Winches page 7

2.1

General Theory of Operation

Important!

• Limit nonuniform winding by keeping tension on the wire rope and by maintaining the proper fl eet angle.

• It is your responsibility to detect and account for different factors affecting the condition and per for mance of the equipment.

2.1.1

THE PULL REQUIRED to move the load must not exceed the load rating of the winch. Consider the total force required to move the load, not the weight of the load.

2.1.2

THIS EQUIPMENT CAN develop forces that will exceed the load rat ing.

It is the responsibility of the equipment user to limit the size of the load.

In spect the equipment regularly for damage according to the instructions contained in this manual.

2.1.3

USE A DISC BRAKE on all hand winches used to lift loads or pull loads on an incline.

2.1.4

PERFORMANCE RATINGS of the equipment are affected by the amount of wire rope wound on the drum, the way in which it is wound, and the way the winch is used.

a

DRUM CAPACITY depends on how tightly and evenly the wire rope is wound on the drum. Actual drum capacities are usually 25-30% less than val ues shown in performance Tables, due to loose winding and overlapping.

b

FORCE REQUIRED TO LIFT the load increases with each additional layer of wire rope wound onto the drum. The value shown in per for mance Tables is based on an empty drum and maximum handle length.

c

LOAD RATING represents the maximum pull that can be placed on new equip ment. Load ratings are assigned values for specifi c amounts of load travel or wire rope accumulation. The load rating de creas es as layers of wire rope accumulate on the drum.

2.1.5

DUTY RATINGS refer to the type of use the equipment is subject to. Con-

sid er the following when determining duty rating.

a

ENVIRONMENT: harsh environments include hot, cold, dirty, wet, cor-

ro sive, or explosive surroundings. Protect the equipment from harsh en vi -

ron ments when possible.

b

MAINTENANCE: poor maintenance, meaning poor cleaning, lu bri ca tion, or inspection, leads to poor operation and possible damage of the equip ment.

Minimize poor maintenance by carefully following the in struc tions con-

tained in this manual.

c

LOADING: severe loading includes shock loading and moving loads that ex ceed the load rating of the equipment. Avoid shock loads, and do not

exceed the load rating of the equipment.

d

FREQUENCY OF OPERATION: frequent or lengthy operations in crease wear and shorten the life span of gears, bearings, and other components.

Increase maintenance of the equipment if used in frequent operations.

2.1.6

AIRBORNE NOISE EMISSIONS vary depending on load and the type of winch being used. Standard confi gurations do not typically exceed a sound pressure level of 80dB(A) at workstations.

CONTACT THE FACTORY FOR MORE INFORMATION.

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page 8 Owner's Manual for Thern Spur Gear Hand Winches

2.2

Breaking-In the Winch

2.2.1

BREAK-IN OCCURS during the fi rst 10 hours of normal operation. During break-in, mating surfaces become polished, and clearances increase. This is desired for effi cient operation of bearings and gears.

2.2.2

INSPECT THE WINCH following break-in according to the Instructions for

Periodic Inspection.

Important!

• When determining whether the load will exceed the load rating, consider the total force required to move the load.

2.3

Preparing for Operation

2.3.1

CONSIDER THE OPERATION. Do not begin until you are sure you can perform the entire operation without hazard.

2.3.2

INSPECT ALL COMPONENTS of the system.

a

INSPECT THE WINCH and other equipment according to the Instructions for Frequent Inspection.

b

OPERATORS must be in good health, alert, thoroughly trained in operating the equipment, and properly clothed (hard hat, safety shoes and safety glass es, no loose clothing).

c

THE LOAD must be clear of other objects and free to move. Make sure the load will not tip, spin, roll away, or in any way move uncontrollably.

2.3.3

KNOW YOUR LOAD and make sure you do not exceed the load rating of the winch or any other equipment in the system.

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Owner's Manual for Thern Spur Gear Hand Winches page 9

2.4

Attaching the Load

Figure 4 – Attaching Load

Do not wrap the wire rope around the load. This damages the wire rope and could cause the load to escape. Use a sling or other approved lifting device.

latch closed tight against hook sling seated in saddle of hook

2.4.1

CLEAR OBJECTS from the path of the load so you can move it freely and observe it at all times during the operation.

2.4.2

ATTACH THE LOAD using a nylon sling, or other approved lifting de vice.

Follow the recommendations of the sling manufacturer.

a

SEAT THE SLING in the saddle of the hook with the hook latch com plete ly closed. See Figure 4.

b

CENTER THE LOAD on the hook so it will remain balanced and not tip or rotate to one side.

2.5

Moving the Load

Important!

• Obey a stop signal from anyone.

• Maintain tension on the wire rope to keep it tightly and evenly wound on the drum.

• If the winch and load are not visible during the entire op er a tion, get help from another person.

• Appoint a supervisor if more than one person is involved in the operation. This will reduce con fu sion and increase safety.

• When lifting a load, use a tag line to keep the load from swinging or twisting, while keeping yourself away from the load.

• Remove the winch handle when the winch is not in use, to help avoid un au tho rized use.

2.5.1

MOVE THE LOAD slowly and smoothly, only a small distance at fi rst.

Make sure the load is balanced and securely attached before con tinu ing.

2.5.2

TURN THE HANDLE CLOCKWISE to wind wire rope onto the drum. If wire rope unwinds from the drum when the handle is rotated clockwise, the wire rope is installed incorrectly. Install the wire rope cor rect ly before

con tinu ing.

2.5.3

OBSERVE THE WIRE ROPE as it winds onto the drum. If it becomes loose, uneven, or overlapped, stop the operation and rewind the wire rope before continuing. Continued operation with overlapped or uneven wire

rope can damage the wire rope and shorten its life.

2.5.4

FOR MODELS M4312 AND M4412 ONLY.

Move the handle to the countershaft to quickly wind or unwind UNLOADED wire rope. Do not attempt

to move a load with the handle installed on the countershaft.

2.5.5

FOR MODELS M4022, M4032, M4312 AND M4412 ONLY. Engage the ratchet when winding wire rope onto the drum, dis en gage the ratchet to unwind the wire rope. DO NOT ENGAGE THE RATCHET while the winch

gears are turn ing. Stop the winch before engaging the ratch et. Disengage the ratchet by moving the load slightly to re move pres sure from the ratchet, then pull out and turn the ratchet knob 90 de grees. Grip the handle tightly at all times during operation. If you re lease the handle the load may backdrive causing the handle to spin. Do not try to stop a spinning handle, step clear

until the spinning stops.

2.5.6

MOVE THE LOAD slowly and smoothly, only a small distance at fi rst.

Make sure the load is balanced and securely attached before continuing.

2.5.7

OBSERVE THE WIRE ROPE as it winds onto the drum. If it becomes loose, uneven, or overlapped, stop the operation and rewind the wire rope before continuing. Continued operation with overlapped or uneven wire rope can damage the wire rope and shorten its life.

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page 10

Important!

Increase the frequency of main te nance procedures if the winch is:

• Operated for long periods.

• Used to pull heavy loads.

• Operated in wet, dirty, hot, or cold surroundings.

Owner's Manual for Thern Spur Gear Hand Winches

3.1

Cleaning the Winch

Clean the winch to remove dirt and help prevent rust and corrosion.

3.1.1

CLEAN THE WINCH every six months or whenever it is dirty.

a

WIPE ALL EQUIPMENT to remove dirt and grease.

b

LEAVE A LIGHT FILM of oil on all surfaces to protect them against rust and corrosion.

c

WIPE OFF excessive amounts of oil to avoid the accumulation of dirt.

3.1.2

REMOVE ALL UNNECESSARY OBJECTS from the area surrounding the winch.

3.2

Lubricating the Winch

Important!

• Make sure lubricant has a tem-

per a ture rating appropriate for the ambient temperatures of the operation.

Do not over lubricate the brake bushings on models equipped with a brake.

Over lu bri cat ing may cause oil to leak onto the friction discs, which may damage the fric tion discs or result in poor operation of the disc brake.

Lubricate the spur gears before each operation, and periodically during op-

er a tion. Failure to lubricate the gears will cause damage or deformation of gear teeth.

Lubricate the winch properly to help protect it from wear and rust. Read the following instructions carefully.

3.2.1

CONSULT MANUFACTURER’S RECOMMENDATIONS for specifi c information on lubricating the wire rope and other equipment.

3.2.2

LUBRICATE WINCH BEARINGS AND SHAFTS at least every 6 months.

a

APPLY 2 TO 3 DROPS of SAE 30 non-detergent oil to bearings and shafts at all fric tion points.

b

ROTATE THE DRUM several times to allow the oil to penetrate, and wipe off excess oil to avoid accumulation of dirt.

3.2.3

LUBRICATE WINCH GEARS before every operation and at least every 10 hours during operation.

a

APPLY A LIGHT FILM of open gear lubricant to the gear teeth on all gears. b

USE SPRAYON S00201 or equivalent open gear lube. For dirty conditions use a dry lubricant such as dry graphite or Moly.

3.2.4

LUBRICATE THE DISC BRAKE IF APPLICABLE at least every 6 months. Place 1 or 2 drops of SAE 30 non-detergent oil into the hole in the brake housing marked “oil”, and turn the brake several times to allow the oil to penetrate.

3.2.5

LUBRICATE THE WIRE ROPE and other equipment by following the man u fac tur er’s recommendations.

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Owner's Manual for Thern Spur Gear Hand Winches page 11

3.3

Inspecting the Equipment

Important!

• Start an inspection program as soon as you put the winch into use.

• Appoint a qualifi ed person to be responsible for regularly in-

spect ing the equipment.

• Keep written records of in spec tion. This allows comparison with comments from previous in spec tions so you can see changes in condition or per for mance.

Do not use damaged or malfunctioning equipment. Place an “OUT OF OR DER” sign on the winch. Do not use the winch until the sign is removed by a qual-

i fi ed maintenance person who has completely corrected the prob lem.

3.3.1

3.3.2

Inspect the winch to detect signs of damage or poor operation before they be come hazardous.

CONSULT APPLICABLE CODES AND REGULATIONS for specifi c rules on inspecting the winch and other equipment.

CONSULT MANUFACTURER’S RECOMMENDATIONS for in for ma tion on inspecting the wire rope and other equipment.

Perform frequent inspections:

• Before each operation.

• Every 3 hours during operation.

• Whenever you notice signs of damage or poor operation.

Frequent Wire Rope Inspection:

• Use ASME B30.7 as a guideline for rope inspection, replacement and maintenance.

• Check the wire rope, end connections and end fi ttings for corrosion kinking, bending, crushing, birdcaging or other signs of damage.

• Check the number, distribution and type of visible broken wires. See paragraph 3.3.4 b and Figure 5.

• Check the wire rope for reduction of rope diameter from loss of core support, or wear of outside wires. See Figure 7.

• Take extra care when inspecting sections of rapid deterioration such as sections in contact with saddles, sheaves, repetitive pickup points, crossover points and end connections.

3.3.3

Instructions for Frequent Inspection

a

VISUALLY INSPECT the entire winch and all other equipment involved in the operation.

• Check all equipment for cracks, dents, bending, rust, wear, cor ro sion and other damage.

• Make sure the wire rope is installed correctly and anchored securely to the drum.

• Make sure the winch and brake are properly lubricated.

• Make sure fasteners are installed to securely hold the handle in place.

• Make sure mounting fasteners are tightened securely.

• Make sure the foundation is in good condition, and capable of sup port ing the winch and its load under all load conditions.

b

TEST WINCH PERFORMANCE by operating the winch with a load not exceeding the load rating.

• Listen for unusual noises, and look for signs of damage as you op er ate the winch.

• Make sure the wire rope winds evenly and tightly onto the drum. If it is loose or uneven, rewind it before continuing.

• Make sure the handle rotates freely in both directions.

• Make sure the load moves smoothly without hesitation or strain.

• On models equipped with a ratchet, make sure the ratchet engages and disengages completely.

• On models equipped with a brake, make sure the disc brake ratchet pawl clicks fi rm ly as the brake han dle is turned clockwise.

• On models equipped with a brake, check the brake. Raise the load, then lower it and stop it a few feet off the ground. If the load continues to coast or creep under normal operating conditions, the friction discs may be worn and in need of re place ment. Contact the factory.

Completely correct all problems before continuing. Use the Trou ble shoot ing

Chart to help determine the cause of certain problems. See Table 2.

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page 12 Owner's Manual for Thern Spur Gear Hand Winches

Perform periodic inspections:

• Every 6 months.

• Whenever you return the winch to service from storage.

• Whenever you notice damage or poor operation in a frequent in spec tion.

• Whenever you have, or think you may have, overloaded or shock loaded the winch.

Figure 5 – Broken Wires

wire strand

Wire rope assembly must be re-

placed if more than 6 wires are bro ken in one lay, or if more than

3 wires are broken in one strand in one lay.

Figure 6 – Load Hook

Inspection

twist throat opening thickness

The wire rope assembly must be replaced if the throat opening is

15% wider than nominal, if the thick ness is 10% less than nominal, or if the hook is twisted 10° or more.

one lay

3.3.4

Instructions for Periodic Inspection, see Table 1.

a

VISUALLY INSPECT the winch and all other equipment.

• Disassembly may be required in order to properly inspect individual components. Contact factory for assembly/disassembly instructions. Disassembly of the winch or brake before contacting Thern, Inc. voids all warranties.

• Check the fi nish for wear, fl aking, or other damage.

• Check all equipment, including wire rope for cracks, dents, bending, rust, wear, cor ro sion and other damage. If the winch was overloaded, or if you notice cracks and other signs of overloading and damage promptly remove equipment from use and have it repaired or replaced. DO NOT

CONTINUE TO USE DAMAGED OR OVERLOADED EQUIP-

MENT OR WIRE ROPE.

• Check all fasteners for stripped threads, wear, bending, and other dam age.

• Check the foundation for cracks, corrosion, and other damage.

• Make sure the winch and brake are properly lubricated.

• Make sure all labels and plates are readable, fi rmly attached, free of damage and clean. Replacements are available from the factory.

b

REMOVE THE WIRE ROPE entirely from the drum.

• Always wear protective clothing when handling wire rope.

• Check the entire length of wire rope for bent wires, crushed areas, bro ken or cut wires, corrosion, and other damage. Care ful ly inspect areas that pass over sheaves or through roller guides.

• Note the location and concentration of broken wires. Replace wire rope if more than 6 wires are broken in one lay, or more than 3 wires are broken in one strand in one lay. See Figure 5.

• Make sure the load hook or other device is securely attached to the wire rope, and the wire rope where it is attached is not frayed, cor rod ed, bro-

ken, or otherwise damaged.

• Measure the throat opening, thickness, and twist of the hook. Re place the hook if it shows signs of damage. See Figure 6.

• Make sure hook latch opens without binding and closes when re leased.

• Check the anchor holes in the drum fl ange for signs of wear or dis tor tion.

c

PLACE enough weight to keep the wire rope straight and tightly drawn.

• Measure the diameter of the wire rope, especially in areas where wear is noticeable. Replace the wire rope if the diameter measures below the min i mum diameter at any point. See Figure 7.

d

REMOVE THE WINCH from the foundation.

• Check fasteners for stripped threads, wear, bends, and other damage.

• Check the frame for bending, distortion, cracks and other dam age. A bent frame is caused by over load ing, and is a sign that your application may require a winch with a larger load rating.

e

MOVE THE DRUM with your hands.

• Check for excessive movement indicating worn or loose gears, bear ings, or shafts.

A8097G-0613

Owner's Manual for Thern Spur Gear Hand Winches page 13

Figure 7 – Rope Diameter

correct

The wire rope assembly must be replaced if the diameter measures less than the minimum diameter at any point.

wire rope diameter

1/8 in

3/16 in

1/4 in

5/16 in

diameter incorrect

minimum diameter

7/64 in (.1094 in)

11/64 in (.1719 in)

15/64 in (.2344 in)

19/64 in (.2969 in)

f

FASTEN THE WINCH securely to the foundation.

g

INSTALL THE WIRE ROPE.

h

TEST WINCH PERFORMANCE by operating the winch with a load equal to the load rating.

• Listen for unusual noises, and look for signs of damage as you op er ate the winch.

• Make sure the wire rope winds evenly and tightly onto the drum. If it is loose or uneven, rewind it before continuing.

• Observe the rotating drum, look for signs of loose or misaligned bear ings.

• Make sure the handle rotates freely in both directions.

• Make sure the load moves smoothly without hesitation or strain.

• On models equipped with a ratchet, make sure the ratchet engages and disengages completely.

• On models equipped with a brake, make sure the disc brake ratchet pawl clicks fi rm ly as the brake han dle is turned clockwise.

• On models equipped with a brake, check the brake. Raise the load, then lower it and stop it a few feet off the ground. If the load continues to coast or creep under normal operating conditions, the friction discs may be worn and in need of re place ment. Contact the factory.

Completely correct all problems before continuing. Use the trou ble shoot ing chart to help determine the cause of certain problems. See Table 2.

Table 1 – Inspection Checklist

checked boxes indicate damage or problem in need of repair

general

damages

fi nish weathered, fl aking, otherwise damaged

parts cracked, bent, rusted, worn, otherwise damaged

fasteners

gears

ratchet

brake assembly

drum

wire rope

stripped threads, bent, worn, otherwise damaged

excessively worn, cracked, corroded, otherwise damaged

ratchet corroded, cracked, worn, otherwise damaged

brake corroded, cracked, worn, otherwise damaged

anchor hole worn, distorted, otherwise damaged

bent, crushed, otherwise damaged

broken wires, see Figure 5 replace if more than 6 wires in one lay, or 3 wires in one strand in one lay, are broken

diameter reduced, see Figure 7 replace if diameter is excessively worn

end connections corroded, rusted, worn, otherwise damaged

load hook twisted, bent, worn, otherwise damaged, see Figure 6 replace if twist is 10 degrees or more replace if throat width is 15% larger than nominal replace if thickness is 10% less than nominal

labels and plates dirty, illegible, otherwise damaged

comments: authorized signature: problems

winch jerks or hesitates during operation

unusual noises, other signs of malfunction

loose, not tightened to proper torque

loose or improperly lubricated

ratchet does not engage or disengage

brake does not operate properly

excessive movement or backlash

wire rope loosely or unevenly wound number per strand = number per lay = diameter =

not securely attached

hook latch fails to close when released twist = throat width = thickness =

loosely attached or missing

date

A8097G-0613

page 14 Owner's Manual for Thern Spur Gear Hand Winches

3.4

Repairing the Winch

Important!

• It is your responsibility to de-

ter mine when to replace parts.

When considering whether to continue using a part or to replace it, re mem ber that replacing it is the best way to avoid further equipment damage.

• Replace all spring pins and retaining rings when you dis as sem ble the winch or brake for repair or replacement.

• Appoint a qualifi ed person to be responsible for all repairs to the equipment.

3.4.1

GET FACTORY AUTHORIZATION for all repairs. Unauthorized repairs will void the warranty, and may lead to damage or failure of the winch.

3.4.2

REPLACE DAMAGED OR POORLY OPERATING PARTS with Thern repair parts.

3.4.3

REFINISH AREAS where the paint is worn or fl aking. A good fi nish helps to protect against corrosion and weather damage.

a

REMOVE THE FINISH from damaged areas, down to the bare metal.

b

CLEAN THE AREA thoroughly.

c

REPAINT with a high quality primer and fi nishing coat.

3.4.4

TO ORDER REPAIR PARTS, contact your local dealer. Include the fol-

low ing in for ma tion when ordering:

• model number

• serial number (or code number)

• part number

• date purchased, and from whom

• description of what happened, or what is wrong

• your name and return address

Important!

• Keep a record of what you ship, and when you send it.

4.1

Transporting the Winch

4.1.1

PACK THE WINCH using the original packaging materials, if possible.

4.1.2

SEAL THE WINCH in plastic with a desiccant to help protect it from rust, corrosion, and other damage.

4.1.3

INSPECT THE WINCH according to the Instructions for Periodic In spec tion before installing it in a new location.

4.2

Storing the Winch

4.2.1

SEAL THE WINCH in plastic with a desiccant to help protect it from rust, cor ro sion, and other damage.

4.2.2

STORE THE WINCH in a cool clean place away from corrosive chem i cals and moisture.

4.2.3

ROTATE THE DRUM periodically to keep bearing and gear surfaces from becoming lacquered.

4.2.4

INSPECT THE WINCH according to the Instructions for Periodic In spec tion before installing it for operation.

A8097G-0613

Owner's Manual for Thern Spur Gear Hand Winches page 15

Table 2 – Troubleshooting Chart

Contact the factory for detailed instructions if you are required to disassemble the winch or brake for any reason.

Disassembly of the winch or brake before contacting Thern, Inc. voids all warranties.

problem

handle turns, drum doesn't turn

cause correction

• loose or broken spring pins . . . . . . . . . . . . . . . . . inspect winch and brake, repair as necessary

• loose, stripped or broken gears . . . . . . . . . . . . . . inspect gears and repair as necessary

handle turns hard or not at all • ratchet on winch engaged . . . . . . . . . . . . . . . . . . disengage winch ratchet

• load too heavy . . . . . . . . . . . . . . . . . . . . . . . . . . . lighten load

• spring pins loose or broken on winch or brake . . . inspect winch and brake, repair as necessary

• disc brake damaged or locked . . . . . . . . . . . . . . . inspect brake, repair as necessary

• gears or bearings broken or locked . . . . . . . . . . . inspect and repair as necessary

brake does not operate properly • friction discs worn or damaged . . . . . . . . . . . . . . . inspect and replace as necessary

• friction discs damaged from over lubrication . . . . inspect and replace as necessary

• disc brake ratchet pawl damaged . . . . . . . . . . . . . inspect and repair as necessary

excessively worn gears or bearings • load too heavy . . . . . . . . . . . . . . . . . . . . . . . . . . . lighten load

(excessive backlash) • poor lubrication of gears or bearings . . . . . . . . . . inspect and relubricate as necessary

overheating • operated too long without rest . . . . . . . . . . . . . . . allow to cool

• load too heavy . . . . . . . . . . . . . . . . . . . . . . . . . . . lighten load

• poor lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . inspect and lubricate as necessary

• bearing seized up . . . . . . . . . . . . . . . . . . . . . . . . . inspect and replace as necessary

unusual noises high pitched squeak grinding noise rattling noise uneven clicking noise in brake weak clicking noise in brake no clicking noise in brake

• poor lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . inspect and relubricate as necessary

• contaminated lubrication . . . . . . . . . . . . . . . . . . . clean and relubricate winch

• dirt in brake or winch gears . . . . . . . . . . . . . . . . . inspect and clean as necessary

• broken gears or bearings . . . . . . . . . . . . . . . . . . . inspect and replace as necessary

• loose bolts, set screws or other fasteners . . . . . . tighten all bolts and other fasteners

• broken gear tooth in brake . . . . . . . . . . . . . . . . . . inspect and repair as necessary

• spring or ratchet pawl dirty or damaged . . . . . . . . inspect and clean or repair as necessary

• worn brake ratchet pawl, gear, or spring . . . . . . . inspect and replace as necessary

• ratchet incorrectly installed . . . . . . . . . . . . . . . . . . disassemble and install correctly

• ratchet pawl damaged or worn excessively . . . . . inspect and replace as necessary

A8097G-0613

page 16 Owner's Manual for Thern Spur Gear Hand Winches

Spur Gear Hand Winch Performance Characteristics

1 model number description load rating (lb) wire drum capacity (ft)

2

1st mid full rope 1st mid full layer drum drum dia. (in) layer drum drum

M4022 1000 lb – marine duty

(for pulling only)

1000 700 500

M4022PB 1000 lb – marine duty 1000 700 500 with brake (for lifting)

M4032 1000 lb – marine duty

(for pulling only)

1000 700 500

M4032PB 1000 lb – marine duty 1000 700 500 with brake (for lifting)

M4042PBSS 1000 lb – stainless steel 1000 800 600 with brake (for lifting)

M4312 2000 lb – marine duty

(for pulling only)

2000 1600 1200

M4312PB 2000 lb – marine duty 2000 1600 1200 with brake (for lifting)

M4312PBSS 2000 lb – stainless steel 2000 1600 1200 with brake (for lifting)

M4412 2000 lb – marine duty 2000 1600 1200

(for pulling only)

M4412PB 2000 lb – marine duty 2000 1600 1200 with brake (for lifting)

1/8 4

3/16 3

1/8 4

3/16 3

1/8 11

3/16 7

1/8 11

3/16 7

1/8 12

3/16 8

1/4 5

3/16 8

1/4 5

5/16 4

3/16 8

1/4 5

5/16 4

3/16 8

1/4 5

5/16 4

3/16 18

1/4 14

5/16 11

3/16 18

1/4 14

5/16 11

48

27

17

48

27

17

110

48

27

48

27

17

97

52

35

97

52

35

52

26

52

26

110

51

110

51

110

59

39

110

59

39

240

110

59

110

59

39

210

120

77

210

120

77

130

57

130

57

250

110

250

110

single double force

3 approx.

gear gear to lift ship ratio ratio 1000 lb wt. (lb)

2.85:1 — 40 lb 12

2.85:1 —

2.85:1 —

2.85:1 —

41 lb

40 lb

41 lb

17

14

18

3.83:1 — 46 lb

(single gear)

24

3.83:1 14.7:1 20 lb

(double gear)

23

— 14.7:1 17 lb

(double gear)

28

— 14.7:1 17 lb

(double gear)

28

3.83:1 14.7:1 20 lb

(double gear)

25

— 14.7:1 17 lb

(double gear)

30

1 Performance Characteristics are for standard products referred to in this manual. Non-standard products may vary from the original

design. Contact Thern, Inc. for this information.

2 Actual drum capacities may be 25-30% less, due to nonuniform winding. Wire rope tension will also affect drum capacity.

3

Approximate handle force required to lift 1000 lb with an empty drum, and maximum handle length.

A8097G-0613

Owner's Manual for Thern Spur Gear Hand Winches

Spur Gear Hand Winch item description

14

15

16

17

18

9

10

11

12

13

4

5

6

7

8

1

2

2a

2b

3

19

20

21

DRUM GEAR GUARD

DRUM ASSEMBLY

DRUM

SLEEVE BEARING

TIE DOWN

HEX NUT .250-20NC SST

CARRIAGE BOLT .250-20NC X .500 SST

LOCK WASHER SPLK INT .375 X .692 X .035 SST

HEX JAM NUT .375-16NC SST

RETAINING RING EXT .625 SST

HANDLE SHAFT

RATCHET PIN

FLANGE BEARING .627ID X .877OD X .625

FRAME

GROOVE PIN TYPE A .187 X 2.00 ALYSTL

RATCHET PAWL

TORSION SPRING .690 X .080 SST

PINION

HANDLE ASSEMBLY

LOCK WASHER HELSPR .625 X 1.086 X .156 SST

HEX JAM NUT .625-11NC SST

CAPSCREW HEXHD .375-16NC ZNPL GR5

DRUM SPACER .625 X 11 GA X 3.235

Model M4022 part number qty.

A1141

A1142

A1003

C1030

A4851

A1047

B1145

A1008

B5868

A3327

B1066

B1040

B2350

A3326

A1013

A3331

A3333

A3939

A3330

A4136

A3329

A3492

A1143

1

1

1

1

1

1

1

2

1

1

1

1

1

1

1

2

2

2

1

1

1

2

1

page 17

Model M4032 part number

A1144

A1146

A1003

C1032

A4851

A1047

B1145

A1008

B5868

A3327

B1066

B2365

B2364

A3326

A1013

A3331

A3333

A3939

A3330

A4136

A3329

A3520

A1145

2

1

1

1

1

2

2

1

1

2

qty.

1

2

1

1

1

1

1

1

1

1

1

1

1

A8097G-0613

page 18

14

15

16

16a

16b

16c

16d

17

18

19

9

10

11

12

13

4

5

6

7

1

8

Spur Gear Hand Winch item

1

2

2a

2b

3

description

DRUM GEAR GUARD

DRUM ASSEMBLY

DRUM

SLEEVE BEARING

DRUM SPACER .625 X 11 GA X 3.235

HEX NUT .250-20NC SST

TIE DOWN

CARRIAGE BOLT .250-20NC X .500 SST

HEX NUT .375-16NC ZNPL GR2

RETAINING RING .625 SST

FLANGE BEARING .627 X .877 X .625

FRAME

PINION

GROOVE PIN TYPE A .187 X 1.375 ALYSTL

HANDLE SHAFT

GROOVE PIN TYPE A .187 X 2.00 ALYSTL

DISC BRAKE ASSEMBLY

HANDLE MEDALLION ASSEMBLY

THUMBSCREW .312-18NC X .750 SST

MEDALLION

DRIVE SCREW #10 X .250 SST

HANDLE ASSEMBLY

SPACER .391 X .560 X 1.212

FLAT WASHER .375 X .750 X .125 SST

CAPSCREW HEXHD .375-16NC ZNPL GR5

Owner's Manual for Thern Spur Gear Hand Winches

Model M4022PB part number

B1066

B1040

B2350

A3326

A1143

A3331

A1013

A3333

A3113

A4136

A1003

C1030

A1008

A4851

SB3904

A4532

C3823

B4218

A8167

B4189

A11745

B4187

A1259

A1907

A3519

1 Item 7 for M4032PB, part number A3576, is a Hex Jam Lock Nut .375-16NC ZNPL GRB.

1

1

1

1

1

1

1

1

1

1

2

1

1

1

1

1

1

1

1

1

qty.

1

1

1

2

1

Model M4032PB part number

B1066

B2365

B2364

A3326

A1145

2

1

1

1

qty.

1

A3331

A1013

A3333

A3576

A4136

A1003

C1032

A1008

A4851

B2366

A4532

C3823

B4218

A8167

B4189

A11745

B4187

A1259

A1907

A3528

1

1

1

1

1

1

1

1

1

1

2

1

1

1

1

1

1

1

1

1

A8097G-0613

Owner's Manual for Thern Spur Gear Hand Winches

Spur Gear Hand Winch item description

9

10

11

12

13

7

8

8a

8b

8c

2

3

4

5

6

1

1a

1b

1c

1d

14

15

16

17

HANDLE MEDALLION ASSEMBLY

HANDLE ASSEMBLY

DRIVE SCREW #10 X .250 SST

THUMBSCREW .312-18NC X .750 SST

MEDALLION

BRAKE ASSEMBLY

BEARING HOUSING ASSEMBLY

RETAINING RING 1.875 SST

COUNTER SHAFT

GROOVE PIN TYPE A .250 X 2.000 SST

FRAME

DRUM ASSEMBLY

DRUM

MACHINERY BUSHING

FLANGE BEARING

HEX JAM NUT .750-16UNF SST

CARRIAGE BOLT .250-20NC X .75 SST

DRUM GEAR GUARD

TIE DOWN

HEX NUT .250-20NC SST

DRUM SHAFT

FLAT WASHER .375 X .750 X .125 SST

HEX JAM NUT .375-16UNC SST

RETAINING RING .750 SST

Model M4042PBSS part number qty.

B2409

C2542

C2541

A4418

A1071

A3886

A2846

C2543

A5922

A3331

B4217

B4201

A11745

A8167

B4199

C3825

A4420

A4409

B2415

A4946

B2410

A1907

A3330

A4408

1

1

1

1

1

1

1

1

1

2

1

1

1

1

1

2

2

1

1

1

1

1

1

1

page 19

A8097G-0613

page 20

Spur Gear Hand Winch item description

12

13

14

15

16

7

8

9

10

11

1

2

3

4

5

6

6a

6b

6c

6d

6e

19

20

21

22

23

17

17a

17b

17c

18

HANDLE ASSEMBLY

CAPSCREW HXHD NYLK .250-20NC X 1.250 SST

COUNTERSHAFT GEAR GUARD

SLOTTED SPRING PIN .250 X .750 SST

HEX JAM NUT .750-16NF SST

COUNTERSHAFT ASSEMBLY

GEAR

BEARING

COUNTER SHAFT

SLOTTED SPRING PIN .125 X 1.500 STL

SLOTTED SPRING PIN .218 X 1.500 STL

HEX JAM NUT .375-16NC SST

LOCK WASHER SPLK INT SST

RIGHT FRAME PLATE

FRAME ROD

RATCHET PAWL

TORSION SPRING .690OD X .080WD SST

DRUM GEAR GUARD

BEARING

LEFT FRAME PLATE

RETAINING RING .750 SST

DRUM ASSEMBLY

FLANGE BEARING

MACHINERY BUSHING

DRUM

TIE DOWN

HEX NUT .250-20NC SST

DRUM SHAFT

COTTER HAIR PIN 1.500 X .091 SST

SPACER .312 X .406 X 1.000 ZNPL STL

CARRIAGE BOLT .250-20NC X .750 SST

Model M4312 part number qty.

C1566

A1071

A3887

C2664

A1013

A3331

A1086

A4665

A2820

A2846

A3330

A3939

C1033

A1148

A1047

B1145

B1067

A1256

C1034

A4408

B1032

A1870

B1021

A4290

A3886

SB3880

SB3876

A1256

SB3879

A4868

A4083

1

1

1

1

1

2

2

1

1

1

1

1

1

1

1

1

1

2

1

1

2

1

1

1

2

1

1

2

1

1

1

Owner's Manual for Thern Spur Gear Hand Winches

Model M4412 part number

C1564

A1071

A3887

C1013

A1013

A3331

B1030

A4665

A2820

A2846

A3330

A3939

C1033

A1147

A1047

B1145

B1067

A1256

C1034

A4408

B1032

A1870

B1021

A4290

A3886

B1026

SB3876

A1256

B2386

A4868

A4083

2

1

2

2

1

1

1

1

1

1

1

1

1

qty.

1

2

1

1

2

1

2

1

1

1

1

1

1

1

1

1

1

A8097G-0613

Owner's Manual for Thern Spur Gear Hand Winches page 21

Spur Gear Hand Winch item description

Model M4312PB part number qty.

2

3

4

5

6

1

1a

1b

1c

1d

HANDLE MEDALLION ASSEMBLY

HANDLE ASSEMBLY

THUMBSCREW .312-18NC X .750 SST

DRIVE SCREW #10 X .250 SST

MEDALLION

7

8

8a

8b

LOCK WASHER SPLK INT SST

COUNTERSHAFT ASSEMBLY

GEAR

BEARING

8c COUNTER SHAFT

8d 1 SLOTTED SPRING PIN .218 X 1.500 STL

8e

2

SLOTTED SPRING PIN .125 X 1.500 STL

B4218

B4187

A8167

A11745

B4189

MACHINERY BUSHING .625 X 14 GA SST A5059

BRAKE ASSEMBLY C3824

CAPSCREW HEXHD NYLK

COUNTERSHAFT GEAR GUARD

HEX JAM NUT .375-16NC SST

A1870

B1021

A3330

A3939

SB3880

SB3876

A1256

SB3879

A4083

A4868

9

10

11

12

13

14

15

16

FRAME ROD

DRUM GEAR GUARD

RADIAL BALL BEARING

LEFT FRAME PLATE

RETAINING RING 1.750 SST

RETAINING RING .750 SST

HEX JAM NUT .750-16NF SST

CARRIAGE BOLT .250-20NC X .750 SST

19

20

21

22

23

17 DRUM ASSEMBLY

17a FLANGE BEARING

17b MACHINERY BUSHING

17c DRUM

18 TIE DOWN

HEX NUT .250-20NC

DRUM SHAFT

SLOTTED SPRING PIN .187 X .750 SST

RIGHT FRAME PLATE

SPACER .312 X .406 X 1.000

A1148

B1067

A1256

C1034

-

A4408

A3886

A2846

C1566

A1071

A3887

C2664

A1013

A3331

SB3806

A4282

C1033

A2820

1

1

1

1

2

1

2

1

1

1

1

2

1

1

1

1

1

-

1

1

2

1

2

1

1

1

1

1

1

1

1

2

1

1

1

1

Item 8d for M4312PBSS, part number A4943, is a Groove Pin Type A .250 x 1.500 SST HT.

2 Item 8e is not shown in parts drawing.

1

1

1

1

2

1

2

1

1

1

1

2

1

1

1

1

1

2

1

1

2

1

2

1

1

1

1

1

1

1

-

2

1

1

1

Model M4312PBSS Model M4412PB part number qty. part number qty.

B2476

C2543

A4599

C2564

A3883

A4408

A3886

A2846

C2542

A1071

A4418

C2541

A5922

A3331

B2474

A4282

C2562

A4457

B4217

B4201

A8167

A11745

B4199

A5059

C3826

A1870

B2475

A3330

A3939

B2472

B2471

A4599

B2469

A4943

-

A1147

B1067

A1256

C1034

-

A4408

A3886

A2846

C1564

A1071

A3887

C1013

A1013

A3331

C1558

A4282

C1033

A2820

B4218

B4187

A8167

A11745

B4189

A5059

C3824

A1870

B1021

A3330

A3939

B2387

SB3876

A1256

B2386

A4083

A4868

1

1

1

1

2

1

1

1

2

1

1

2

1

1

1

1

1

-

2

1

1

1

2

1

1

1

1

1

1

1

1

1

1

2

1

A8097G-0613

page 22

Disc Brake Assemblies item description

11

12

13

14

15

16

17

6

7

8

9

10

1

2

3

4

5

RETAINING RING 1.750 SST

SLEEVE BEARING

HEX JAM NUT .375-16NC SST

LOCK WASHER HELSPR .375 X .683 X .094 SST

BRAKE HOUSING

SLEEVE BEARING

HEX DRIVE NUT

SLOTTED SPRING PIN .250 X .500 SST

FRICTION DISC

BRAKE RATCHET WHEEL

SLEEVE BEARING

BRAKE BOLT

RATCHET PAWL

SPACER .391 X .500 X .675

TORSION SPRING

BRAKE COVER

CAPSCREW HEXHD .375-16NC X 1.500 SST

Owner's Manual for Thern Spur Gear Hand Winches

C3823 part number

A3883

SA3990

A3330

A3357

C2807

A3223

B4209

A3275

SA4569

SA3992

SA3993

SB3903

A1103

A1104

A1842

A1105

A3884

qty.

1

1

1

1

1

1

1

1

1

1

2

1

1

1

1

1

1

C3825 part number

A3883

SA3990

A3330

A3357

C2547

A3223

B4220

A3275

SA4569

A4600

SA3993

B2413

A4416

A4415

A1842

A4417

A3884

1

1

1

1

1

1

1

1

1

1

2

1

qty.

1

1

1

1

1

A8097G-0613

Owner's Manual for Thern Spur Gear Hand Winches

Disc Brake Assemblies item description

11

12

13

14

15

16

17

6

7

8

9

10

1

2

3

4

5

RETAINING RING 1.750 SST

SLEEVE BEARING

HEX JAM NUT .375-16NC SST

LOCK WASHER HELSPR .375 X .683 X .094 SST

BRAKE HOUSING

SLEEVE BEARING

HEX DRIVE NUT

SLOTTED SPRING PIN .250 X .500 SST

FRICTION DISC

BRAKE RATCHET WHEEL

SLEEVE BEARING

BRAKE BOLT

RATCHET PAWL

TORSION SPRING

SPACER .391 X .500 X .675

BRAKE COVER

CAPSCREW HEXHD .375-16NC X 1.500 SST

C3824 part number

A3883

SA3990

A3330

A3357

C2807

A3223

B4209

A3275

SA4569

SA3992

SA3993

SB3807

A1103

A1842

A1104

A1105

A3884

qty.

1

1

1

1

1

1

1

2

1

1

2

1

1

1

1

1

1

page 23

C3826 part number

A3883

SA3990

A3330

A3357

C2547

A3223

B4220

A3275

SA4569

A4600

SA3993

B2478

A4416

A1842

A4415

A4417

A3884

1

1

1

1

1

1

1

2

1

1

2

1

qty.

1

1

1

1

1

A8097G-0613

Thern, Incorporated

5712 Industrial Park Road

Winona, MN 55987

PHN 507-454-2996

FAX 507-454-5282

EMAIL: [email protected]

www.thern.com