Table of Contents
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Read this Owner's Manual
thoroughly before operating
the equipment. Keep it with
the equipment at all times.
Replacements are available
from Thern, PO Box 347,
Winona, MN 55987,
507-454-2996.
www.thern.com
IMPORTANT: Please record
product information on
page 2. This information is
required when calling the
factory for service.
ORIGINAL TEXT
A21392-E-1122
Owner's Manual
For 3CP Liberty Series
Capstan Winches
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Table of Contents
Related Manuals for Thern Liberty 3CP1S-AFS
Summarization of Contents
Installing the Winch
Consult Applicable Codes and Regulations
Consult relevant codes and regulations for equipment installation.
Locate the Winch in a Clear Area
Ensure winch is in an accessible area clear of obstacles.
Locate the Winch in Ambient Temperatures
Ensure winch is located in an area with specified ambient temperatures.
Locate the Winch for Fleet Angle
Position winch to maintain appropriate rope fleet angle, not exceeding 15 degrees.
Fasten the Winch Securely
Fasten winch securely to foundation or hitch mount accessory.
Hitch Mount Accessory Installation
Attach hitch mount accessory to vehicle using supplied hardware.
Connecting Electric Power
Connect Electric Power with Extension Cord
Use appropriately sized extension cord for 120 Volt power source.
Plug in Foot Switch Cord
Plug in the foot switch cord securely.
Twist Foot Switch Plug Clockwise
Twist the foot switch plug clockwise to secure it.
Test Power Operation
Test power by operating the foot switch.
Installing the Rope
Recommended Rope Specifications
Use ½ - ¾ inch synthetic rope, following manufacturer guidelines.
Install the Rope on the Drum
Open safety gate and wrap rope counter-clockwise onto the drum.
Use Proper Number of Rope Wraps
Use sufficient rope wraps for load, aiming for ~20 lbs effort.
Insert Rope into Rope Lock
Insert rope into rope lock by opening cam and positioning rope.
Release Cam to Secure Rope
Release the cam to secure the rope in place.
Remove Rope
Reverse the steps to remove the rope.
General Theory of Operation
Pull Required vs. Load Rating
Pull required must not exceed winch load rating; consider total force.
Equipment Force Development
Equipment can develop forces exceeding load rating; user must limit load.
Duty Ratings Explained
Duty ratings relate to use type; consider environment and maintenance.
Environment Considerations
Protect equipment from harsh environments (hot, cold, dirty, wet, etc.).
Maintenance Impact on Duty
Poor maintenance leads to poor operation and damage; follow manual.
Breaking-In the Winch
Winch Break-In Process
Break-in polishes surfaces and increases clearances for efficient operation.
Inspect After Break-In
Inspect winch after break-in period as per periodic inspection instructions.
Preparing for Operation
Consider Operation Before Starting
Ensure entire operation can be performed without hazard.
Inspect Winch and Equipment
Inspect winch and all other equipment per frequent inspection instructions.
Operator Health and Attire
Operators must be healthy, alert, trained, and properly clothed.
Ensure Load Path is Clear
Ensure load path is clear and load will not move uncontrollably.
Know Your Load and Rating
Know load and ensure it does not exceed winch or system rating.
Rope Handling Method
Have a method for handling rope to prevent tripping or entanglement.
Attaching the Load
Clear Load Path
Clear objects from load path for free movement and observation.
Attach Rope to Load
Attach rope using approved lifting device, follow manufacturer recommendations.
Position Winch for Fleet Angle
Reposition winch to achieve least fleet angle to the load.
Moving the Load
Secure Hand Line
Securely grasp the hand line end of the rope.
Move Load Slowly and Smoothly
Move load slowly and smoothly, ensuring stability and secure attachment.
Use Foot Switch Control
Use foot switch for winch motor operation; it stops when released.
Raise the Load
Pull on hand-line end of rope to raise the load, ensure hand-line is through rope lock.
Observe Rope Winding
Observe rope winding, maintain tension on hand-line to prevent issues.
Operating Rope Lock
Engage Rope Lock for Entry
Pull rope lock pull cord to allow rope entry.
Engage Rope Lock
Release cam to engage rope lock; always run rope through it.
Raise Load with Rope Lock
Pull rope to raise load; stop by releasing tension and letting cam close.
Lower Load with Rope Lock
To lower, raise load slightly, pull cam open, and pay out hand line.
Adjusting The Rope Lock
Loosen Socket Head Screws
Loosen or remove socket head cap screws on the rope lock assembly.
Adjust Rope Lock Position
Adjust rope lock to desired location and tighten screws to 37 ft-lb.
Adjust Cam Block Angle
Adjust cam block angle by loosening small screw and tightening to 5 ft-lbs.
Cleaning the Winch
Clean the Winch
Clean the winch to remove dirt and prevent rust/corrosion.
Drum Lubrication Warning
Do not apply grease or oil to the drum.
Inspecting the Equipment
Consult Codes for Inspection
Consult applicable codes and regulations for inspection rules.
Instructions for Frequent Inspection
Visual inspection, check for damage, leaks, fastener tightness, foundation.
Periodic Inspection
Visual Inspection of Winch and Equipment
Visually inspect winch, checking finish, parts, fasteners, gearbox, and labels.
Inspect Rope
Refer to rope manufacturer's guidelines for inspection.
Move the Drum Manually
Check for excessive movement indicating worn components.
Inspect Foundation and Rigging
Check mounting fasteners and foundation for damage.
Test Winch Performance
Test winch performance with a load, listen for noises, check brake and rope lock.
Disconnect Electric Power
Disconnect power and inspect electrical equipment for damage.
Repairing the Winch
Factory Authorization for Repairs
Obtain factory authorization for all repairs to avoid voiding warranty.
Replace Damaged Parts
Replace damaged or poorly operating parts with Thern repair parts.
Refinish Areas
Refinish areas or replace components where finish is worn or flaking.
Order Repair Parts
Contact dealer to order parts, providing model, serial, and problem description.
Transporting the Winch
Pack the Winch for Transport
Pack winch using original materials or suitable alternatives.
Inspect Winch Before New Location
Inspect winch according to periodic inspection before installing in a new location.
Carry the Winch Safely
Carry winch using the handle and rope lock bar for a secure grip.
Storing the Winch
Seal Winch in Plastic
Seal winch in plastic with desiccant for rust and corrosion protection.
Store Winch Upright
Store winch upright in a cool clean place away from corrosive elements.
Rotate Drum Periodically
Rotate drum periodically to keep bearing and gear surfaces from lacquering.
Inspect Winch Before Operation After Storage
Inspect winch according to periodic inspection before installing for operation.
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