Thern 5FT20 Series Owner'S Manual Download Page 2

A25317-A-1119

page 2 

Owner's Manual for Thern 5FT20 and 5FT25 Captain Series Stationary Davit Cranes

Please record the following:

Date Purchased:

Crane Model No.:

Crane Serial No.:

If sold with a winch:

Winch Model No.:

Winch Serial No.:

This information is required when
calling the factory for service.

Two-Year Limited Warranty

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
modification 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
INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR BREACH OF ANY EXPRESS OR IMPLIED
WARRANTY ON THIS PRODUCT. EXCEPT TO THE EXTENT PROHIBITED BY APPLICABLE LAW, ANY
IMPLIED WARRANTY
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
specific 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
responsibility 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 owner's
responsibility to obtain copies of these regulations and to determine the suitability
of the equipment to its intended use.

This Owner’s Manual, and warning labels attached to the equipment, are to serve
as guidelines for hazard-free installation, operation, and maintenance. They should
not be understood to prepare you for every possible situation.

The information contained in this manual is applicable only to the Thern Captain
Series Model 5FT20 and 5FT25 Stationary Davit Cranes. Do not use this manual
as a source of information for any other  equipment.

The following symbols are used for emphasis throughout this manual:

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

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

Important!

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

Summary of Contents for 5FT20 Series

Page 1: ...ment Keep it with the equipment at all times Replacements are available from dlhonline co uk 0161 223 1990 IMPORTANT Please record product information on page 2 This information is required when calli...

Page 2: ...OR BREACH OF ANY EXPRESS OR IMPLIED WARRANTY ON THIS PRODUCT EXCEPT TO THE EXTENT PROHIBITED BY APPLICABLE LAW ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ON THIS PRODU...

Page 3: ...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 sheaves gears wire rope and other m...

Page 4: ...other approved lifting device Do not operate the crane with guards removed or improperly installed Do not divert your attention from the operation Stay alert to the possibility of accidents and try t...

Page 5: ...turning moments and mounting bolt reaction See Table 1 a FOR STANDARD PRODUCTS referred to in this manual use coarse thread fasteners grade 5 or better Recommended torque for 5 8 inch coarse threaded...

Page 6: ...so the boom is horizontal 1 2 8 SLIDE THE BOOM EXTENSION into the boom and secure in place with the clevis pin and lynch pin provided Make sure the boom extension is positioned correctly with auxiliar...

Page 7: ...of use the equipment is subject to Consider the following when determining duty rating a ENVIRONMENT harsh environments include hot cold dirty wet corrosive or explosive surroundings Protect the equip...

Page 8: ...hly trained in operating the equipment and properly clothed hard hat safety shoes and safety glasses no loose clothing d THE LOAD must be clear of other objects and free to move Make sure the load wil...

Page 9: ...is balanced and securely attached before continuing 2 4 2 OPERATE THE WINCH to raise or lower the load Refer to the instructions in the Winch Owner s Manual 2 4 3 OBSERVE THE WIRE ROPE as it winds ont...

Page 10: ...ted inside of the mast before installation and at least every 3 months Use a grease gun to apply NLGI 2 grease to the grease fitting on the side of the mast 3 2 3 LUBRICATE THE MAST BEARING located at...

Page 11: ...5 REMOVE THE WINCH and adapter plate from the crane 3 3 6 REMOVE THE BOOM EXTENSION a ADJUST THE BOOM ANGLE using the ratchet jack so the boom is horizontal b SECURE THE BOOM EXTENSION then remove the...

Page 12: ...ut hesitation or strain On hand operated models make sure the winch handle rotates freely in both directions On power operated models make sure the winch responds to the control device It must rotate...

Page 13: ...under load brake corroded cracked worn otherwise damaged brake does not operate properly sheaves holes worn distorted or otherwise damaged does not rotate freely wire rope bent crushed otherwise dama...

Page 14: ...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 co...

Page 15: ...inspect and replace as necessary boom bounces up and down load too heavy lighten load mounting bolts loose tighten mounting bolts to proper torque sheave worn or damaged inspect and replace as necess...

Page 16: ...nformation when ordering model number serial number or code number part number product finish enamel epoxy galvanized etc date purchased and from whom description of what happened or what is wrong you...

Page 17: ...have been corrected 3 6 4 PREPARE A TEST LOAD with a load sensing device 3 6 5 FOR MAXIMUM DYNAMIC LOAD TEST load the crane to 110 of its rated capacity and operate the crane through its designed ran...

Page 18: ...ns for Frequent Inspection before installing it for operation See Section 3 4 3 Instructions for Frequent Inspection 4 2 Storing the Crane 4 2 1 PARTIALLY DISASSEMBLE THE CRANE and store all parts in...

Page 19: ...BLY 750 16NF SST B7396 1 13 ZERK 125 27NPT A3196 1 14 ZERK DRIVE 250 X 65 DEG ZNPL STL A3197 1 15 CAPSCR BTNHD 375 16NC X 500 SST A14205 1 16 JACK RATCHET 1 31 X 37 00 57 25 AGAL A24831AGAL 1 17 PIN C...

Page 20: ...BLY 750 16NF SST B7396 1 13 ZERK 125 27NPT A3196 1 14 ZERK DRIVE 250 X 65 DEG ZNPL STL A3197 1 15 CAPSCR BTNHD 375 16NC X 750 SST A12244 1 16 JACK RATCHET 1 31 X 37 00 57 25 AGAL A24831AGAL 1 17 PIN C...

Page 21: ...scription part number part number part number part number POWER WINCH 4WP2EGRA K 3WG4B KX 4771EGRA K 4771DCEGRA K ADAPTER PLATE KIT n a A24869 C3114EGRA C5137EGRA x4 CAPSCR HEXHD A3355 A4192 n a n a x...

Page 22: ...oducts may vary from the original design Contact Thern Inc for this information 3 Wirerope assembliesinclude a hookandaswaged ballfitting toworkwithquickdisconnect anchor on the winch 316 stainless wi...

Page 23: ...ility of the equipment to its intended use Study all applicable codes manuals and regulations Be sure to read the Owner s Manual supplied with the equipment before operating it Boom Position First Lay...

Page 24: ...o uk is a division of Dale Lifting and Handling Specialists 2 Kelbrook Road Parkhouse Street Industrial Estate Manchester M11 2QA Telephone 0161 223 1990 Email mezzbarriers dale lifting co uk www dlho...

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