Section VIII. PISTON AND.RINGS

Figure 13-45. Minimum Valve Head Rim Thk

Figure 13-47. Piston and Connecting Rod, Exploded View

TM-5-6115-593-34 Generator Set Diesel Engine Driven Tactical Skid Mtd. 600 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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TM5-6115-593-34 NAVFAC P-8-631-34 TO-35C2-3-463-2 (3) Lift and rotate camshaft slightly while pulling from block. (4) Tag camshaft to identify left-bank or right- bank. b. Inspection. (1) Check camshaft bushing journals with micrometer. Replace camshaft if journals are worn beyond 2.120 inches (53.85 mm). (2) Replace camshaft that has scuffed, scored, or cracked injector valve lobes. c. Installation. (1) Apply clean engine lubricating oil to camshaft journals and lobes. Carefully rotate camshaft through bores into position. (2) Slide the camshaft into position with two "0" marks on camshaft gear aligned with "0" marks on side of timing gear. (3) Attach a dial indicator to gear case. Place indicator to gear case. Place indicator arm on camshaft gear teeth. (4) Rotate gears by hand to advance position; "zero" indicator. There must be a minimum of 0.003 inch (0.08 mm). Section VIII. PISTON AND.RINGS 13-33. PISTON CONNECTING RODS, CONNECTING ROD BEARINGS, PISTON PINS, AND RINGS. To inspect and replace the pistons and connecting rods, refer to figure 13-47 and proceed as follows: a. Removal. (1) Clean all carbon from upper inside wall of each cylinder liner with ridge reamer and fine emery cloth. (2) Remove connecting rod bolt nuts (2) and washers (3). (3) Pull caps (7) and bearing shells (5) from connecting rods. (4) Tape bearing shells together and label each pair by cylinder number for later reference. (5) Using a soft hammer, drive rod bolts (4) from rods. CAUTION Do not mutilate inner walls of cylinder liners. (6) Push connecting rod and piston assembly from cylinder liners with a wooden stick, holding pistons so they will not be lost or damaged. (7) Reassemble each connecting rod cap to assembly as it is removed; the rod caps are not interchangeable. Label each assembly by cylinder number. NOTE Rods and caps are matched assemblies; as removed make sure parts are stamped, so they can be reassembled correctly. Phase 3 rods are stamped 1/4 inch (6.4 mm) either side of the bolt hole centerline. If a new assembly is used, be sure to stamp before installing in engine. (8) Remove piston snap rings (9). (9) To facilitate removal of piston pins (10), first heat piston in boiling water, then push pin from piston, using finger pressure. Do not drive or otherwise force pin from piston. (10) Remove piston rings (13, 14, 15, and 16). (11) Remove cylinder liners from 13-89

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