Bosch Engine Brake Manual (EN)

Parts Manual Engine Brakes Model T675A Engine Brakes For Mack 6 Cylinder, 2 Valve Head ENDT-673, 675, 676 & E6 Series Engines TecBrake P.O. Box 27822 Houston, Texas 77227

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TecBrake Engine Brake Model T675A For Mack 6 Cylinder, 2 Valve Head ENDT-673, 675, 676 & E6 Series Engines ENGINE BRAKE KIT CONTENTS AND OPTIONAL PARTS PART NO. DESCRIPTION QTY./ENG. The TecBrake T675A engine Brake may be installed on Mack model ENDT 673, 675, 676 and E6 six cylinder, two valve head engines. These engines, although similar, were produced with variations that affect the components required to make an engine brake installation.

TB960007 BRAKE KIT, (W/O AIR TO AIR KIT) TB940033 KIT,LITERATURE 1 TB940029 HOUSING ASSEMBLY, FRONT 1 TB940030 HOUSING ASSEMBLY, REAR 1 TB940031 ATTACHING PARTS GROUP 1 TB940032 CONTROL GROUP 1 The TecBrake kit includes all of the parts required to make an installation on the most common engine configurations. TJ002049 TURBO SPACER 1 TJ003093 BRACKET SWITCH 1 TJ003621 BRACKET SWITCH 1 TJ003622 ARM, SWITCH ACTUATOR 1 TJ012260 FOOT SWITCH (OPTIONAL) 1 TJ011355 FEELER GAUGE (0.030") Important: Information required to order engine brake kits. Determine if the engine has an engine mounted intercooler.

If it does, an optional Air to Air Adapter Group (TJ010174) is required to complete the installation. Indented part numbers are included in parts under which they are indented. Determine if a Robert Bosch fuel pump is installed. An optional fuel pump switch bracket and actuating arm are required for all engines equipped with Robert Bosch fuel pumps. HOUSING ASSEMBLY Part No. TB940029 - Front Part No. TB940030 - Rear Determine if the engine is turbocharged but not intercooled. An optional turbocharger spacer must be ordered if the engine is turbocharged but not intercooled. REF. PART NO. DESCRIPTION QTY./HSG. 1 TJ011930 CONTROL VALVE 3 2 TJ011435 SPRING, CTRL.

VALVE, INNER 3 3 TJ011434 SPRING, CTRL. VALVE, OUTER 3 4 TJ012757 COVER,CONTROL VALVE 3 5 TJ001492 SCREW, HEX 2 6 TJ016440 SOLENOID VALVE (12 VOLT) 1 7 TJ001081 SEAL RING, UPPER 1 8 TJ001082 SEAL RING, MIDDLE 1 9 TJ001083 SEAL RING, LOWER 1 10 TB909354 NUT, JAM 3 11 TJ013823 SCREW ASSEMBLY, PLUNGER 3 12 TJ012836 MASTER PISTON 3 13 TJ002030 SPRING, FLAT 3 14 TJ003790 SCREW, BUTTON HEAD 3 15 TJ007622 SLAVE PISTON 3 16 TJ007772 SPRING, SLAVE PISTON, INNER 3 17 TJ001288 SPRING, SLAVE PISTON, OUTER3 18 TJ007620 RETAINER, SPRING 3 19 TJ001023 RING, RETAINER 3 COMPONENTS INCLUDED IN KIT:

The Housing Assemblies (one front and one rear) as well as the Attaching Parts Group will fit on all versions of the engines. Included in the Attaching Parts Group are two sets of six valve stem caps. One set will fit 0.435 diameter valve stems. The other cap will fit 0.486 diameter valve stems. The Control Parts Group includes all the electrical components and their mounting brackets. The Control Group is designated to be used with engines equipped with American Bosch fuel pumps. COMPONENTS NOT INCLUDED IN KIT: On engines equipped with Robert Bosch fuel pumps, the fuel pump switch is mounted on the air compressor, requiring a different mounting bracket and actuating arm.

Two fuel pump switch mounting brackets are available for mounting on either a Bendix or Midland air compressors. See optional parts list for part numbers. ATTACHING PARTS GROUP Part No. TB940031 REF. PART NO. DESCRIPTION QTY.

ENGINE 1 TJ002035 SPACER, COVER 2 2 TJ002299 TERMINAL ASSEMBLY 2 3 TJ002034 SCREW, ADJUST, EXHAUST 6 4 TJ002033 SCREW, OIL SUPPLY 2 5 TJ002411 O-RING 2 6 TJ009263 CAP, VALVE STEM (0.435”) 6 6 TJ002032 CAP, VALVE STEM (0.486”) 6 7 TJ002031 BOLT, ROCKER SHAFT BRKT 6 8 TJ015843 HARNESS, SOLENOID 2 NI TK554GB38A GASKET, COVER/SPACER 4 NI TK590GB2111A GASKET, CROSS-OVER 2 NI TK56AX465 WASHER, FIBER 6 Engines equipped with a turbocharger but no intercooler require an optional air intake manifold spacer (TJ002049). Engines equipped with chassis mounted intercoolers may require a longer turbocharger lube oil feed line. This may be fabricated on the job or ordered from Mack (Part No.

42QEA4451RB-32) OPTIONAL FOOT SWITCH: A foot switch may be used in place of the clutch switch. The clutch switch is included in the brake kit. The foot switch is not included and must be ordered separately. NI.- Not Illustrated.

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HOUSING ASSEMBLY ATTACHING PARTS AIR TO AIR ADAPTER GROUP Part No. TJ010174 REF. PART NO. DESCRIPTION QTY./ENGINE 1 TJ010012 MANIFOLD, BREATHER 1 2 TJ010832 PLUG, PIPE 1 3 TJ003835 CLAMP, V-BAND 1 4 TJ003832 SPACER, OFFSET 1 5 TJ003833 HOSE, OFFSET, AIR INLET 1 6 TJ006821 HOSE, COUPLING 1 7 TJ004563 SCREW, BUTTON HEAD 1 8 TJ006827 CLAMP, HOSE ASSEMBLY 2 AIR TO AIR ADAPTER KIT

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OPTIONAL PARTS REQUIRED FOR ENGINES EQUIPPED WITH ROBERT BOSCH FUEL PUMPS CONTROL GROUP Part No. TB9400032 For use with American Bosch fuel pump REF. PART NO. DESCRIPTION QTY./ENGINE REF. PART NO.

DESCRIPTION QTY./ENGINE WITH MIDLAND AIR COMPRESSOR 10 TJ003093 BRACKET, SWITCH 1 NI TJ003622 ARM, SWITCH ACTUATOR 1 1 TJ012724 SWITCH ASSY., FUEL PUMP 1 TJ001534 DIODE 1 TJ018188 SWITCH (BARE FOR TJ012724) 1 2 TJ012413 ARM, SWITCH ACTUATOR 1 3 TJ012261 SWITCH ASSEMBLY., CLUTCH 1 TB901216 SWITCH (BARE, FOR TJ012261) 1 4 TJ001304 SWITCH, TOGGLE, DASH 2 5 TJ001305 PLATE, SWITCH (ON-OFF) 2 6 TJ015759 HARNESS, FUSE HOLDER 1 7 TJ003707 SHRINK TUBE 4 8 TJ003278 TERMINAL (FAST-ON) 6 9 TB900007 HARNESS, CAB/ENGINE 1 NI TJ006833 TIE, CABLE 8 * TB900001 HARNESS, GROUND 1 WITH A BENDIX AIR COMPRESSOR 11 TJ003621 BRACKET, SWITCH 1 NI TJ003622 ARM, SWITCH ACTUATOR 1 Indented part numbers are included in parts under which they are indented.

NI.- Not Illustrated. * For lighted dash switches only. MAJOR TUNE-UP KIT Part No. TJ018676 PART NO. DESCRIPTION QTY./KIT TJ015843 HARNESS, SOLENOID 2 TJ002030 SPRING, FLAT 6 TJ011930 CONTROL VALVE 6 TJ002299 TERMINAL 2 TJ011435 SPRING, CTRL. VALVE., INNER 6 TJ001722 CAPSCREW, BUTTON HEAD 4 TJ011434 SPRING, CTRL. VALVE, OUTER 6 TJ001492 CAPSCREW (675A, T675A) 4 TJ001081 SEAL RING, UPPER 2 TJ001082 SEAL RING, MIDDLE 2 TJ001083 SEAL RING, LOWER 2 TJ002411 O-RING 2 TJ003790 CAP SCREW, BUTTON HEAD 6 TJ001023 RING, RETAINING 6 TJ012757 COVER, CONTROL VALVE 4 TJ004490 TERMINAL 2 OPTIONAL PARTS REQUIRED FOR ENGINES EQUIPPED WITH A TURBOCHARGER BUT NO INTERCOOLER TURBOCHARGER SPACER PART No.

TJ002049 Mack® and V-MAC® are registered trademarks of Mack Trucks Inc. Tec Brake Inc. P.O. Box 27822 Houston, Texas 77227 ©1998 Tec Brake Bulletin No. TB990121A 11/23/98

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