Vehicle Braking - General Information Section 20 - Vehicle Braking - Group 20 M11 Page 20-2 Vehicle Braking - General Information For installation and adjustment of the Jacobs W Engine Brake, Model 411, refer to the installation and parts manuals. The Installation Manual, Form No. 018874, and the Parts Manual, Form No. 018875, can be purchased from a Jacobs W Engine Brake dealer, or refer to the manufacturer at the following address: The Jacobs W Manufacturing Company Vehicle Equipment Division 22 East Dudley Town Road Bloomfield, CT 06002 U.S.A. Telephone: (203) 243-1441