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Thern 5334 Series Owner's Manual

Portable davit crane
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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, Inc., 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.
A6111A-0405
Owner's Manual
For
Series 5334
Portable Davit Crane

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Summary of Contents for Thern 5334 Series

  • Page 1 Read this Owner’s Manual thoroughly before operating the equipment. Keep it with the equipment at all times. Replacements are available 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 required when calling the factory for service.

  • Page 2: Two-Year Limited Warranty

    Thern, Inc. warrants its products against defects in material or workmanship for two years from the date of purchase Please record the following: by the original using buyer, or if this date cannot be established, the date the product was sold by Thern, Inc. to the Date Purchased: dealer.
  • Page 3 Owner's Manual for Thern Series 5334 Portable Davit Crane page 3 Suggestions for Safe Operation 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 crane, readable and with the equip- ment at all times.
  • Page 4 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 QUALIFIED PROFES- SIONAL TO OBTAIN PROPER STRUCTURE OR FOUNDATION SPECI- FICATIONS FOR THE MOUNTING OF THERN PRODUCTS.

  • Page 5: Assembling The Crane

    Owner's Manual for Thern Series 5334 Portable Davit Crane page 5 Assembling the Crane STUDY PARTS DRAWINGS to understand how the crane is assembled. See 1.2.1 Important! page 17. • Inspect the crane during assem- LUBRICATE PINS and other components prior to assembly. Refer to the 1.2.2...

  • Page 6: General Theory Of Operation

    6 Owner's Manual for Thern Series 5334 Portable Davit Crane General Theory of Operation THE PULL REQUIRED to move the load must not exceed the load rating of 2.1.1 Important! the crane. Consider the total force required to move the load, not the weight •...

  • Page 7: Preparing For Operation

    Owner's Manual for Thern Series 5334 Portable Davit Crane page 7 Preparing for Operation CONSIDER THE OPERATION. Do not begin until you are sure you can 2.2.1 Important! perform the entire operation without hazard. • When determining whether the INSPECT ALL COMPONENTS of the system.

  • Page 8: Attaching The Load

    8 Owner's Manual for Thern Series 5334 Portable Davit Crane 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 fall. Use a sling or other approved lifting device.
  • Page 9 Owner's Manual for Thern Series 5334 Portable Davit Crane page 9 Cleaning the Crane Clean the crane to remove dirt and help prevent rust and corrosion. Important! CLEAN THE CRANE every six months or whenever it is dirty. Increase the frequency of mainte- 3.1.1...

  • Page 10: Inspecting The Equipment

    10 Owner's Manual for Thern Series 5334 Portable Davit Crane Inspecting the Equipment Important! Do not use damaged or malfunctioning equipment. Place an “OUT OF ORDER” • Start an inspection program as sign on the crane. Do not use the crane until the sign is removed by a qualified soon as you put the crane into use.
  • Page 11 Owner's Manual for Thern Series 5334 Portable Davit Crane page 11 Instructions for Periodic Inspection Perform periodic inspections: 3.3.4 • Every 6 months. VISUALLY INSPECT the crane and all other equipment. • Whenever you return the crane to • Check the finish for wear, flaking, or other damage.
  • Page 12 12 Owner's Manual for Thern Series 5334 Portable Davit Crane REMOVE THE WINCH and inspect it by following the instructions in the Figure 7 – Load Chain Winch Owner’s Manual. Inspection DISASSEMBLE THE CRANE, and inspect each part for damage.
  • Page 13 Owner's Manual for Thern Series 5334 Portable Davit Crane page 13 Table 1 – Inspection Checklist checked boxes indicate damage or problem in need of repair damages problems general finish weathered, flaking, otherwise damaged equipment not properly lubricated parts cracked, bent, rusted, worn, otherwise damaged...
  • Page 14 14 Owner's Manual for Thern Series 5334 Portable Davit Crane Repairing the Crane GET FACTORY AUTHORIZATION for all repairs. Unauthorized repairs 3.4.1 Important! will void the warranty, and may lead to damage or failure of the crane. • It is your responsibility to de- REPLACE DAMAGED OR POORLY OPERATING PARTS with Thern termine when to replace parts.
  • Page 15 Owner's Manual for Thern Series 5334 Portable Davit Crane page 15 Transporting the Crane PARTIALLY DISASSEMBLE THE CRANE into parts that can be easily 4.1.1 Important! transported. • Keep a record of what you ship, PACK THE CRANE for transport, using the original packaging materials, if and when you send it.
  • Page 16 16 Owner's Manual for Thern Series 5334 Portable Davit Crane Portable Davit Crane Model 5334M1 item description part number qty. Capscrew HxHd .625-11NC x 2.750 SST A3347 Flat Washer SAE .625 SST A3348 Spacer A1382 Hex Jam Nut NyLk .625-11NC SST...
  • Page 17 Owner's Manual for Thern Series 5334 Portable Davit Crane page 17 15, 16, 17 MAST-HOOK WELDMENT ASSEMBLY 11, 21 11, 21 BOOM TIP ASSEMBLY BOOM SWIVEL ASSEMBLY A6111A-0405...
  • Page 18 18 Owner's Manual for Thern Series 5334 Portable Davit Crane This page intentionally left blank. A6111A-0405...
  • Page 19 Owner's Manual for Thern Series 5334 Portable Davit Crane page 19 This page intentionally left blank. A6111A-0405...
  • Page 20 Thern, Incorporated 5712 Industrial Park Road Winona, MN 55987 PHN 507-454-2996 FAX 507-454-5282 EMAIL: info@thern.com www.thern.com...

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