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NUMBER: 2–60–01Rev S.M. REF.: 1.29
ENGINE: 60 DATE: February 2001
REVISION: A vertical bar indicates change. Please discard Service Information Bulletion 2–60–01 dated January 2001 and it’s attachment pages. File this bulletin and insert attachment pages in it’s place in service manual. SUBJECT: NEW MODEL 790/795 JAKE BRAKE® INTRODUCTION
New design Jake Brake® are now used on all year 2000–build Series 60® on-highway vehicle engines and all other Series 60 engine applications requiring engine brakes. DETAILS AND REASON
New design Model 795 Jake Brakes are used on all year 2000–build Series 60 on-highway vehicle engines manufactured on and after August 10, 2000. Model 795 Jake Brakes are also used on all year 2000–build Series 60 engines requiring an engine brake. Model 795 Jake Brake took effect with engine serial number 6R-613173. New Jake Brake model 795 features:
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Solid adjusting (set) screws Lash setting is now at 0.8128 mm (0.032 in.) Cam lobe modification (101J cam) — injector cam roller lift at TDC is 6.527–7.594 mm (0.257–0.299 in.) Injector Timing Height is at 82.1 mm (3.232 in.) Provides slightly better braking performance at high rpm
New tools to be used:
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9/16 in. socket wrench for the nut 3/16 Allen wrench 0.81 mm (0.032 in.) feeler gage for lash Injector Timing Height tool, J 45002
JACOBS INFORMATION
For more detailed information concerning Jacobs Vehicle Systems 790/795 Jake Brake® Models, visit www.jakebrake.com/service/lie790–795.htm. Jacobs’ web site will detail the following information:
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790/795 Specifications 790/795 Parts Manual 790/795 Tune-Up Kit Instructions Jacobs Engine Brake Application Guide for DDC Engines
ADDITIONAL SERVICE INFORMATION
Additional service information is available in the Detroit Diesel Series 60 Service Manual, 6SE483. The next revision to this manual will include the revised information. As a convenience to holders of the Series 60 Service Manual, information in service manual format is attached. The page(s) may be inserted into the manual. NOTE: Manual insert pages are numbered for insertion into the current Series 60 Service Manual dated October 2000. Service manuals are available from authorized Detroit Diesel distributors. If this bulletin was obtained from the Internet, service manual page(s) are available by returning to the screen “SIB Index”, selecting attachment pages, and printing the page(s).
Detroit Diesel®, DDC® and the spinning arrows design are registered trademarks of Detroit Diesel Corporation. Series 60® is a registered trademark of Detroit Diesel Corporation. Jake Brake® is a registered trademark of Jacobs Vehicle Systems. J-Lash™ is a trademark of Jacobs Vehicle Systems. © Copyright 2001 Detroit Diesel Corporation. All rights reserved. Printed in U.S.A.
