11 INTRODUCTIONCongratulations on your choice of a Walinga® Agri-Vac® to complement your operation. This equipment has beendesigned and manufactured to meet the needs of the discriminating buyer for the efficient moving of grain.Safe, efficient and trouble free operation of your new Walinga® Agri-Vac® requires that you, and anyone elsewho will be operating or maintaining the Agri-Vac®, read, understand and practice ALL of the Safety, Operation,Maintenance and Trouble Shooting recommendations contained within this Operator's Manual.This manual applies to the Walinga® 3510 gas or electric Agri-Vac®. Use the Table of Contents and Index as aguide to find required information.OPERATOR ORIENTATION - The directions left, right, front and rear as mentioned throughout this manual arewhen viewed from the airlock end of the machine. The steering handle is the front, drive system left and airlockrear.