1.29 JAKE BRAKE - ddcsn.com

1 SERIES 60 SERVICE jake BRAKE The engine BRAKE has been designed to fit on the Series 60 engine with no additional valve coverspacers. There are three styles of valve covers for the Series 60 engine. On engines equippedwith a two-piece aluminum valve cover, it is NOT necessary to remove the lower valve cover toinstall the engine BRAKE . However, one style of upper valve cover may require modification at thebreather housing location (inside) for engine BRAKE model, part number and serial number are located on the nameplates at the top of eachhousing.

2 See Figure Identification PlateFigure 1-425 Nameplate Location on HousingNOTICE:Only the specific BRAKE model can be used with the engine modelit was designed for. Also, the correct slave piston adjustmentspecification must be used. Failure to follow these instructionsmay result in serious engine or engine BRAKE in Table 1-9 are the different jake BRAKE models used and the slave piston information subject to change without 0010 Copyright 2001 DETROIT DIESEL CORPORATIONFrom Bulletin BRAKE Model NumberModel YearEngineDisplacementEngineBrakeSlave mm ( in.)

3 Mm ( in.) mm ( in.) mm ( in.) mm ( in.) mm ( in.) mm ( in.) mm ( in.) mm ( in.) mm ( in.) mm ( in.) mm ( in.) mm ( in.) mm ( in.) mm ( in.)6067 HKXX1998 (Non-Line Haul) mm ( in.)6067MK28, 6067MK45,6067MK57, mm ( in.)6067BK28, 6067BK45,6067BK57, mm ( in.)6067HK45, 6067HK60200014L mm ( in.)6067WK28, mm ( in.)6067LK28, 6067LK45, mm ( in.)6063GK60, 6067GK28,6067GK45, 6067GK91,6067PK62, 6067TK28,6067TK60, mm ( in.)6067HK62200014L mm ( in.)6067MK28, 6067MK45,6067MK57, mm ( in.)

4 6067BK28, 6067BK45,6067BK57, mm ( in.)6067HK45, 6067HK60200014L mm ( in.)6067WK28, mm ( in.)6067LK28, 6067LK45, mm ( in.)All information subject to change without Bulletin 0010 Copyright 2001 DETROIT DIESEL CORPORATIONSERIES 60 SERVICE MANUAL6063GK60, 6067GK28,6067GK45, 6067GK91,6067PK62, 6067TK28,6067TK60, mm ( in.)6067HK62200014L mm ( in.)All slave piston adjustments shown here are current as of the date of this manual and supersede all previous = Model numbers to be 1-9 jake BRAKE Model InformationNOTE:All engines built after serial number 06R0004455 have the correct engine parts forengine BRAKE installation.

5 The model numbers have changed because of design changesin the engine :All Series 60 engines with serial numbers 06R0004455 or higher are jake BRAKE not install a jake BRAKE on engines with lower serial August 10, 2000, Model 795 jake Brakes are used on all Series 60 engines requiringan engine jake BRAKE production models for the Series 60 engine were the 760A (which replacedmodel 760), 760B, 765, 765A, 770 and Diesel engine model Nos. 6067GU28 and 6067GK28 are for bus/coach to interference fits on some coach chassis, a two-housing jake BRAKE kit may be your Detroit Diesel Distributor for information on these BRAKE is a registered trademark of Jacobs Vehicle Systems.

6 J-Lash is a trademark of Jacobs Vehicle information subject to change without 0010 Copyright 2001 DETROIT DIESEL CORPORATIONFrom Bulletin BRAKE Energizing the engine BRAKE effectively converts a power-producing diesel engine into apower-absorbing air compressor. This is accomplished through motion transfer using amaster-slave piston arrangement which opens cylinder exhaust valves near the top of the normalcompression stroke, releasing the compressed cylinder charge to exhaust. See Figure Exhaust Valve7.

7 Oil In2. Slave Piston Assembly8. Check Valve (Model 760)3. Exhaust Valve9. Solenoid Valve4. Leveling Screw10. Control Valve5. Slave Piston Adjusting Screw11. Master Piston6. Accumulator12. Injector Pin and RollerFigure 1-426 jake BRAKE SchematicAll information subject to change without Bulletin 0010 Copyright 2001 DETROIT DIESEL CORPORATIONSERIES 60 SERVICE MANUALThe blowdown of compressed air to atmospheric pressure prevents the return of energy to theengine piston on the expansion stroke, the effect being a net energy loss.

8 Since the work done incompressing the cylinder charge is not returned during the expansion blowdown occurs as the energized solenoid valve permits engine lube oil to flow underpressure through the control valve to both the master piston and the slave piston. See Figure pressure causes the master piston to move down, coming to rest on the injector rocker injector rocker arm begins its travel as in the normal injection cycle, moving the master pistonupward and directing high-pressure oil to the slave piston.

9 The ball check valve in the controlvalve traps high-pressure oil in the master-slave piston pressure oil causes the slave piston to move down, momentarily opening the exhaust valves,while the engine piston is near its top-dead-center position, releasing compressed cylinder air tothe exhaust the bottom of its stroke, the slave piston separates from the valve in the slave piston adjustingscrew, allowing high pressure oil to flow into the accumulator. This reduces the pressure in thehigh pressure circuit, permitting the slave piston to retract and the exhaust valves to close inpreparation for the normal exhaust valve cycle.

10 The oil pressure reserved in the accumulatorensures that the hydraulic circuit is fully charged for the next cycle. Compressed air escapes to theatmosphere, completing a compression braking jake BRAKE is electronically controlled. jake BRAKE control system wiring willvary depending on the vehicle manufacturer. For a general overview of the jake BRAKE ,see Figure 1-427 and see Figure information subject to change without 0010 Copyright 2001 DETROIT DIESEL CORPORATIONFrom Bulletin BRAKE 1. Ball Check Valve (Model 760 Only)12.