Parts Manual For M, M Plus & ISM
Model 4/4C/D Aftermarket Kits P/N Description 380484 4 kit, 2 VDC, S/L 38048 4 kit, 24 VDC, S/L 380486 4 kit, 24 VDC, D/L 380076 4C kit, 2 VDC, D/L 408939 4D kit, 2 VDC, S/L 4948 4E kit, 2 VDC, S/L Housing Assemblies P/N Description 4906837 4 front, 2 VDC, S/L 4906838 4 rear, 2 VDC, S/L 4906833 4 front, 24 VDC, S/L 4906834 4 rear, 24 VDC, S/L 4906829 4 front, 24 VDC, D/L 4906830 4 rear, 24 VDC, D/L 490682 4C front, 2 VDC, D/L 4906826 4C rear, 2 VDC, D/L 303430 4D front, 2 VDC, S/L 30343 4D rear, 2 VDC, S/L 4966492 4E front, 2 VDC, S/L 4966493 4E rear, 2 VDC, S/L No. P/N Description Quantity 4 / 4C/ 4 D/E 387477 Slave piston 3 3 3 2 38733 Outer slave piston spring 3 3 3 3 38732 Inner slave piston spring 3 3 3 4 38740 Spring retainer 3 3 3 387373 Retaining ring 6 6 6 6 387 Master piston, /6 dia. 3 3 3 7 3878 Flat spring 3 3 3 8 387384 Plain washer 3 3 3 9 387383 Button head screw 3 3 3 0 387372 Control valve 3 3 3 38734 Cont. valve spring (orange) 3 3 3 2 387366 Outer control valve spring 3 3 3 3 387364 Control valve collar 3 3 3 4 38736 Control valve cover 3 3 3 387484 Reset screw assembly 3 3 3 4970029 Reset screw assembly (4E ONLY) 3 6 387379 Hex jam nut 3 3 3 7 387707 Solenoid valve (2 V, S/L) 0 7 387708 Solenoid valve (24 V, S/L) 0 0 7 387709 Solenoid valve (24 V, D/L) 0 0 7 3877 Solenoid valve (2 V, D/L) 0 0 8 387638 Upper seal ring 0 9 402637 Center seal ring 20 38728 Lower seal ring 2 387204 Ball 22 387388 Ball check spring 23 286369 Pipe plug 9 9 9 24 387634 Solenoid harness (2 for D/L) 0 S/L = Single Lead, D/L = Double Lead, NI = Not Illustrated Application Notes The CBrake by Jacobs engine retarder is designed and approved for use on several Cummins engines. Refer to the chart below for model and approved engine use. Information in this manual was current at the time of printing and is subject to change without notice or liability. Model Engine 4 M & M Plus 4C ISM 998-200 4D ISM 2002-2006 4E ISM 2007 - Present Refer to Cummins service information and instructional literature for specific application information. 23 2 22 7 8 9 20 2 3 4 2 3 0 4 The exploded view shown is of the front housing. The rear housing is a mirror image of the front housing and contains the same components. 6 24 Model 4 (M and M PLUS ENGINES) FRONT 4 M / M Plus 6 8 3 2 REAR 6 9 4 Model 4C, 4D, & 4E (ISM engines) Rear Housing Front Housing * 4 D/E will only have one wire per solenoid 9 6 7 7 8 cbrake BY JACOBS PARTS MANUAL for CUMMINS M/M PLUS and ism engines
MODEL 4 (M and M PLUS ENGINES) MODEL 4 (ISM ENGINES) 3 4 22 6 8 20 7 2 9 23 23a 24 MODEL 4 (M and M PLUS ENGINES) Attaching Parts No. P/N Description Quantity Engine Attg. Parts Group 4 308079 Rocker Adjusting Screw 6 2 306627 Hex jam nut 6 3 306042 Crosshead assembly 6 4 3073972 Electrical connector 2 3073974 Electrical connector (D/L) 2 307397 Oil supply tube Assy (Ill. 6 & 7) 6 387404 O-ring 2 7 NSS Oil supply tube 8 3073976 Bulkhead adapter 9 389626 Clamp 3 0 387667 Adapter O-ring 2 3073977 Compression seal 2 309626 Support clamp Quantity/Group Engine Attg. Parts Group 4C/D 4E 3 308079 Rocker Adjusting Screw 6 4 306627 Hex jam nut 6 307392 Crosshead assembly 6 307397 Oil supply tube Assy (6 & 7) 6 387404 O-ring 2 7 NSS Oil supply tube NI 3036230 Hex Hd Cap Screw NI 3036460 Washer NI 382783 Screw, Washer 8 3406907 Bulkhead adapter 9 3406909 Compression Seal 20 682 Support Clamp 3 2 2 306364 Adapter O-ring, 6-6 2 22 340699 Support clamp, Long 23 3689 Dual Solenoid Harness * 4 leads, 4C 23a 30203 Dual Solenoid Harness * 2 leads, 4D/E * Be aware that you have either No. 23 or 23a, not both. Quantity/Group 4 4C/D/E Housing Attg. Parts Group 24 30760 Capscrew 6 6 Spacer Attg. Parts Group 2 390063 Hex bolt 8 8 26 308483 Spacer (die cast) 0 27 3406906 Spacer (die cast) 0 28 387472 Gasket 29 389297 Int. oil supply hose assy. 0 30 3899642 Ext. oil supply hose assy. 0 3 340690 Int. oil supply hose assy. 0 32 3406904 Ext. oil supply hose assy. 0 4949709 Ext. oil supply hose assy. (4E Only) NSS - Not Sold Separately MODEL 4C/4D (ISM ENGINES) cbrake BY JACOBS PARTS MANUAL for CUMMINS M/M Plus and ism engines 3
By Control Groups M Engines No. P/N Description Quantity/Group 2 6 HI LO 3 4 ENGINE BRAKE 388326 Cab Control Group (CELECT ) 387486 Relay switch (CELECT) 2 387499 Plate, HI/LO 3 387498 Switch, HI/LO 4 387244 Dash plate, ON/OFF 38749 Toggle switch, ON/OFF 6 387689 Relay base 4 NI 387339 Cable tie 4 7 3080422 Engine control harness (CELECT ) Control Groups ISM/ M Plus Engines 7 Quantity/Group No. P/N Description 4 4C/D 387669 Cab Control Group (CELECT Plus) 2 387499 Plate, HI/LO 3 387670 Switch, HI/LO 4 387244 Dash plate, ON/OFF 387648 Toggle switch, ON/OFF NI 387339 Cable tie 4 4 7 309433 Wire harness 0 NOTE: controls installed by vehicle oems may be different than ctonrols supplied by cummins. 2 Service Parts No. P/N Description 4 a 3 387428 Feeler gage, 0.0 (0.38 mm) a 36372 Feeler gage, 0.027 (0.68 mm) (4E Only) 2 38764 Slave piston removal tool 3 3870 Slave piston - 0.060" shorter for clearance issues 4 3876 Solenoid screen retainer 38766 Solenoid screen NI 38780 Tune-up kit cbrake BY JACOBS PARTS MANUAL for CUMMINS M/M Plus engines 4
NOTES cbrake BY JACOBS PARTS MANUAL for CUMMINS M/M PLUS engines
Cummins Inc. Box 300 Columbus, IN 47202-300 U.S.A. www.cummins.com CELECT is a trademark of Cummins Inc. Bulletin 3698826 Printed in U.S.A. 06/3 03 cummins Inc. CBrake by Jacobs is a trademark of Cummins Inc. and Jacobs Vehicle Systems Jacobs is a registered trademark of Jacobs Vehicle Systems Jacobs P/N 0247 Rev. F 06/3 www.jacobsvehiclesystems.com