
INTRODUCTION
Thank you for choosing a Gorbel® Retrofit II to solve your material handling needs. The innovative design and
heavy-duty construction of a Retrofit II added to an existing jib will provide a superior quality product that will offer
years of long term value. All Gorbel® cranes are pre-engineered for powered hoist operation. The hoist weight
allowance is 15% of the crane capacity (for example, a crane rated for 1000 pounds allows for a 1000-pound live
load plus 150 pounds for the weight of the hoist). There is also an allowance of 25% of the crane capacity for
impact caused by hoist use. Gorbel® Free Standing Jib Cranes will provide many years of dependable service by
following the installation and maintenance procedures described herein.
Dimensions contained in this installation manual are for reference only and may differ for your particular
application.
Normal safety precautions: These include, but are not limited to:
• Checking for obstructions in crane rotation
• Checking that all bolts are tight and have lockwashers
• Making sure that endstop is in place
• Making sure that festooning cannot be snagged or pinched
For additional safety precautions see page 12.
WARNING
Only competent erection personnel familiar with standard fabrication practices should be employed to assemble
these cranes because of the necessity of properly interpreting these instructions. Gorbel is not responsible for the
quality of workmanship employed in the installation of a crane according to these instructions. Contact Gorbel, Inc.,
at 600 Fishers Run, P.O. Box 593, Fishers, New York, 14453-0593, 1-800-821-0086, for additional information if
necessary.
WARNING
Equipment described herein is not designed for, and should not be used for, lifting, supporting or transporting
humans. Failure to comply with any one of the limitations noted herein can result in serious bodily injury and/or
property damage. Check State and Local regulations for any additional requirements.
WARNING
Consult a qualified structural engineer to determine if your support structure is adequate to support the loads
generated by anchor bolt force, overturning moment, or axial load of your crane.
WARNING
Crane cannot be utilized as a ground: A separate ground wire is required. For example, systems with 3-phase
power require 3 conductors plus one ground wire.
WARNING
Reference American Institute of Steel Construction (AISC) manual of Steel Construction (9th edition), Part 5,
Specification for Structural Joints using ASTM A325 or A490 bolts (section 8.d.2) for proper procedures to follow
when using any torque tightening method.
WARNING
Do not field modify crane in any way. Any modifications without the written consent of Gorbel, Inc. will void
warranty.
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