1 Greer Company MG500 Computer for Terex Crane. Note This Computer needs to be programmed with the capacity chart file for the machine it will be used on. We'll need the crane model & s/n as well as the load chart number in order to program the computer for your machine. This Computer replaces several obsolete versions of Greer MG500 Computers: Part Numbers A450621, A450623, A450629, & A450729. We stock the largest inventory of Greer parts in the world.Jeff Johnson, Kerry Felix, & Bob Johnson. Professional Service & Repair, Inc. The item "Greer Company MG500 Computer used on on Link-Belt Cranes Greer part# A450829" is in sale since Thursday, February 15, 2018. This item is in the category "Business & Industrial\Electrical Equipment & Supplies\Electronic Components & Semiconductors\Other Electronic Components". The seller is "psr_inc" and is located in Columbus, Georgia. This item can be shipped worldwide.