Thern 548 Owner's Manual
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Thern 548 Owner's Manual

Floor crane
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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.
IMPORTANT: Please record
product information on
page 2. This information is
re quired when calling the
fac to ry for service.
A6759C-0912
Jamieson Equipment Company | 5314 Palmero Court | Buford, GA 30518 | 800.875.0280 | sales@jamiesonequipment.com
Owner's Man ual
For
Model 548
Floor Crane

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Summary of Contents for Thern 548

  • Page 1 Keep it with the equip ment at all times. Re place ments are avail able from Thern, Inc. IMPORTANT: Please record product information on page 2. This information is re quired when calling the fac to ry 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 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. Contact Thern, Inc. for replacements. Check lubrication before use.

  • Page 4: Assembling The Crane

    4 Owner's Manual for Thern Model 548 Floor Crane Assembling the Crane Important! When the boom is released from its folded position, it moves rapidly and with • Inspect the crane during assem- force. Keep the area in front of the boom (between the crane legs) clear of any bly according to the Instructions obstruction when releasing the boom.

  • Page 5: General Theory Of Operation

    Owner's Manual for Thern Model 548 Floor Crane page 5 General Theory of Operation Important! Avoid shock loads created by quickly opening and closing the release valve as • It is your responsibility to detect a load is being lowered. Shock loads may overload the hydraulic circuit and and account for different fac- cause damage to the jack.

  • Page 6: Preparing For Operation

    6 Owner's Manual for Thern Model 548 Floor Crane Preparing for Operation Important! Do not use the crane in an area defi ned as hazardous by the National Elec tric • When determining whether the Code, unless use in such an area has been thoroughly ap proved.

  • Page 7: Attaching The Load

    Owner's Manual for Thern Model 548 Floor Crane page 7 Attaching the Load CLEAR OBJECTS from the path you will travel, so you can move freely 2.3.1 Figure 3 – Attaching Load and ob serve the load at all times during the operation.
  • Page 8 8 Owner's Manual for Thern Model 548 Floor Crane 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. 3.1.1 Increase the frequency of main te - nance procedures if the crane is: WIPE ALL EQUIPMENT to remove dirt and grease.

  • Page 9: Inspecting The Equipment

    Owner's Manual for Thern Model 548 Floor Crane page 9 Inspecting the Equipment Important! Do not use damaged or malfunctioning equipment. Place an “OUT OF OR DER” • Start an inspection program as sign on the crane. Do not use the crane until the sign is removed by a qual i fi ed soon as you put the crane into use.
  • Page 10 10 Owner's Manual for Thern Model 548 Floor Crane Instructions for Periodic Inspection 3.3.4 Perform periodic inspections: VISUALLY INSPECT THE CRANE and all other equipment. Disassemble • Every 6 months. the crane as necessary to inspect in di vid u al components.
  • Page 11 Owner's Manual for Thern Model 548 Floor Crane page 11 Table 1 – Inspection Checklist checked boxes indicate damage or problem in need of repair damages problems general fi nish weathered, fl aking, otherwise damaged equipment not properly lubricated parts cracked, bent, rusted, worn, otherwise damaged...
  • Page 12 THE HYDRAULIC JACK B6017 is a modifi ed Norco 76402A. 3.4.5 If you would like to purchase a new jack for the crane, please contact Thern, Inc. 548 cranes with a serial number of 5012-66448 or higher are equipped with a Norco bottle jack, P/N B6017.
  • Page 13 Owner's Manual for Thern Model 548 Floor Crane page 13 Collapsing the Crane ADJUST THE BOOM EXTENSION to its shortest length. 4.1.1 Figure 6 – Collapsing the Crane LOWER THE BOOM, leaving the release valve untightened. 4.1.2 PUSH THE BOOM tight against the stop which contains the handle spring.
  • Page 14 Dimensions are for reference only and subject to change without notice. Performance Characterirstics are for standard products referred to in this manual. Non-standard products may vary from the original design. Contact Thern, Inc. for this information. A6759C-0912 Jamieson Equipment Company | 5314 Palmero Court | Buford, GA 30518 | 800.875.0280 | sales@jamiesonequipment.com...
  • Page 15 Owner's Manual for Thern Model 548 Floor Crane page 15 8 18 17 18 14 18 HANDLE SUPPLIED WITH JACK 9 10 11 12 13 A6759C-0912 Jamieson Equipment Company | 5314 Palmero Court | Buford, GA 30518 | 800.875.0280 | sales@jamiesonequipment.com...

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