1 JT922 ISSUE NO. 06PL-06/11 For Replacement Copy Order P/N 053-1134 This manual contains information concerning the following models: JT922 & JT922T4i Directional Drilling System Copyright 2007, 2009, 2011 by The Charles Machine Works, Inc. , Ditch Witch, CMW, AutoCrowd, Jet Trac, Roto Witch, Subsite, Fluid Miser, Power Pipe, Super Witch, Pierce Arrow, Zahn, The Underground, and The Underground Authority Worldwide are registered trademarks of The Charles Machine Works, Inc. ID0176431