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Owner's Manual for Thern 5PA5 and 5PA10 Ensign Series Portable Davit Cranes

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A11577I-0617

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 5PA5 and 

5PA10 Ensign Series Portable 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.

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.

Summary of Contents for 5PA10

Page 1: ...ts are available from Thern Inc 5712 Industrial Park Road Winona MN 55987 507 454 2996 www thern com Owner s Manual For 5PA5 and 5PA10 Ensign Series Portable Davit Cranes IMPORTANT Please record produ...

Page 2: ...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 imp...

Page 3: ...e of the equipment Do not use more than one crane to move a load that exceeds the load rating of a single crane A shift in load weight could overload the equipment Do not use damaged or malfunctioning...

Page 4: ...d mounting bolt reaction See Table 1 a FOR STANDARD PRODUCTS referred to in this manual use 5PA5 1 2 in coarse thread fasteners Grade 5 or better Recommended torque without lubrication is 75 ft lb 5PA...

Page 5: ...NSTALL THE MAST in the base Move the mast side to side to make sure the bottom of the mast properly seats on the pin in the bottom of the base The crane will not be stable unless properly seated See F...

Page 6: ...n place with the boom brace assembly as shown in Figure 5 Make sure the tip of the boom brace adjustment screw is correctly positioned with the mast boom brace plate a in some situations it may be des...

Page 7: ...etermining duty rating a Environment harsh environments include hot cold dirty wet corrosive or explosive surroundings Protect the equipment from harsh environments when possible b maintenance poor ma...

Page 8: ...Know your load and make sure you do not exceed the load rating of the crane or any other equipment in the system 2 2 4 Position the boom so the load hook is centered over the load Avoid side pulls wh...

Page 9: ...tions in the Winch Owner s Manual 2 4 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...

Page 10: ...ated at the bottom of the base before installation and at least every 3 months Use a grease brush to apply a film of NLGI 2 grease to the pin Not required with 5PA5 model 3 2 3 Lubricate the mast bear...

Page 11: ...EMOVE THE WIRE ROPE a REMOVE ROPE KEEPER PINS located at each sheave near the ends of the boom b UNWIND THE ROPE from the winch drum and release the anchor c REPLACE THE ROPE KEEPER PINS 3 3 5 REMOVE...

Page 12: ...itation 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 as sho...

Page 13: ...does not operate properly sheaves holes worn distorted or otherwise damaged does not rotate freely wire rope bent crushed otherwise damaged wire rope loosely or unevenly wound broken wires see Figure...

Page 14: ...igure 9 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 corroded broken or otherwise damaged Measure the throat openi...

Page 15: ...diameter correct incorrect Figure 11 Rope Diameter The wire rope assembly must be replaced if the diameter mea sures less than the minimum diameter at any point wire rope minimum size diameter 3 16 in...

Page 16: ...or failure of the crane 3 5 2 Replace damaged or poorly operating parts with Thern repair parts 3 5 3 Refinish areas where the paint is worn or flaking A good finish helps to protect against corrosio...

Page 17: ...s 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 a...

Page 18: ...O A6889 2 22 LABEL WARNING B5790 1 23 LABEL WARNING BEFORE LOADING B5791 2 24 LABEL LOAD RATING 5PA5 B5792 1 25 LABEL MODEL ENSIGN B6111 2 5PA5 5PA5G 5PA5X 5PA5S 5PA5S316 Fusibond Galvanized Epoxy Sta...

Page 19: ...11 PIN HEADLESS 750 X 4 688 EFF LENGTH S 1 A12172 12 PIN HEADLESS 750 X 2 625 EFF LENGTH S 1 A12173 13 PIN HEADLESS 750 X 4 188 EFF LENGTH S 2 A12174 14 PIN HEADLESS 750 X 5 250 EFF LENGTH S 1 A12175...

Page 20: ...5 RETAINER PUSH 1 When ordering parts be sure to specify whether the finish is red galvanized epoxy or stainless Wall Base 5BW5 Series item part no description 1 SEE TABLE WELDMENT BASE 5BW5 2 5BC5 BA...

Page 21: ...8 LABEL THERN 4 A14615 RETAINER PUSH 5 A13820 CAPSCR SOKLHD 312 18NC X 500 ZNPL 6 A4379 NUT HEX JAM NYLK 312 18NC SST 18 8 1 When ordering parts be sure to specify whether the finish is red galvanized...

Page 22: ...0 5 1 5 3 16 5 20 6 0 x x x 8 2 4 13 3 9 3 16 5 28 8 5 x x x 16 4 8 21 6 4 3 16 5 36 10 9 x x x 25 7 6 30 9 1 3 16 5 45 13 7 x x x 40 12 1 45 13 7 3 16 5 60 18 2 x x 55 16 7 60 18 2 3 16 5 75 22 8 x x...

Page 23: ...A 4 650 294 48 1219 112 2844 B 1 1200 544 22 558 97 2463 B 2 1000 453 26 660 103 2616 B 3 800 326 32 812 110 2794 B 4 650 294 39 990 120 3048 1 Lift below floor level varies depending on boom position...

Page 24: ...5712 Industrial Park Road Winona MN 55987 PH 507 454 2996 FAX 507 454 5282 EMAIL info thern com www thern com Thern Europe Bedrijvenpark Twente 454e 7602 KM Almelo Netherlands PH 31 546 898 380 EMAIL...

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