Cummins/Onan — SEAL SPACER GEARING SPACER

For these Cummins/Onan models: 12, 0MDJC-3CR, 12.0MDJF-53CR, 15.0MDJF-3cR, 3omDJaiR, 4.0MCCK-3cR, 6.0MDJE-53CR, 6.5MCCK-3CR, 6.OMDJE-S18R, 612-4792, 7.SMOJE-18R, ISOMDJF-3GR.

Applies to: Cummins Onan 12 0Mdjf 53Cr, Cummins Onan 15 0Mdjf 3Cr, Cummins Onan 3Omdjair, Cummins Onan 4 0Mcck 3Cr, Cummins Onan 6 0Mdje 53Cr, Cummins Onan 6 5Mcck 3Cr, Cummins Onan 6 Omdje S18R, Cummins Onan 7 Smoje 18R, Cummins Onan Isomdjf 3Gr, Cummins Onan Mcck Spec H, Cummins Onan Mdje 8, Cummins Onan Spec H, Cummins Onan Tsmdje 3Cr

Procedure

1. 2. Using solid end of bearing driver, press top bearing and seal out bottom end. retaining ring and off yoke shaft. Thoroughly clean and oil yoke and shaft assembly and adapter for installing new bearings and seal Install bottom bearing from top of adapter casting using hollow end of bearing driver. Make sure “lettered” side of bearing faces upward and that Slide yoke and shaft assembly up through bear- ing, then support yoke and shaft assembly for installing the retaining ring. ° ing ring on shaft, far enough so ring snaps into groove on shaft. Slide bearing spacer sleeve (shortest sleeve) over bottoms against top of adapter boss and that “lettered” side of the bearing faces upward. Replace bearing spacer sleeve with seal spacer oil seal over shaft at top of adapter. © b. Using a depth micrometer, measure the dis- tance from the mounting face of the adapter to the base circle of either cam lobe. ‘The shim kit contains shims in the following th ta and OvBinehen one sim shim. For the greatest accuracy, measure the ‘otal shi thickness with a microm is installed with “lettered” side down, facing the adapter boss. ADAPTER INSTALLATION Proceed as follows: 9 Sn
2. 2. Determine shim thickness required between pump and adapter because the new gasket may not be the same thicknessas the original one. See ‘The proper shim thickness is stamped on the block for the tion of the injection pump. GASKET ADAPTER DEPTH MICROMETER formula: Standard installation depth of pum 1598 “inches (82.8 mm) Distance from adapter eins to cam lobe base circle as measured (subtract from above) Required shim thickness = inches (mm) *Many earlier spec AB MDJE engines have an in- stallation dimension of 3.2540 (82.652 mm). On these uni Ifso,
3. 3. 2540 should be substituted for 3.2598 in Step 4. INJECTION PUMP INSTALLATION Install injection pump on adapter assembly as follows: 1, Rotate crankshaft to position camshaft so that the m lobes). One lobe 49
4. 2. Using proper shim thickness (Figure 3-50), install Nem). [GROTIONT Be sure he control rack batts between tt CYLINDER BLOCK WALL the rack ball Is not properly placed in the yoke, engine beh ‘operation will be uncontrollable and must be stopped im- ‘mediately. blocking the air intake, THICKNESS
5. 3. To measure for shim thickness: a. Rotate crankshaft to position injection pump ‘cam lobes on the camshaft in a vertical posi- tion so the base circle of each lobe faces the adapter opening. F by loosening (just cracking) the Injector line fittings at the pump end. » Connect flexible fuel inlet line to pump inlet. 18 ft. Ib. (22-24 Nem). Reinstall fuel control arm on yoke and shaft screw, but do not over tighten. > o FUEL CONTROL ARM YOKE AND SHAFT ASSEMBLY
6. 6. Adjust fuel solenoid plunger 0 that a 0.010 to
7. 0. 030 inch (0.25 to 0.71
8. 0. 010-00030 INCH
9. 7100. 070inch (4.3to 1.8 mm),

Source: manual:932-0405 Onan Marine Genset MCCK MDJA MDJC MDJE MDJF Training Manual (07-1979).pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.