TM 9-6115-604-34NAVFAC P-8-633-34d.Repair.(1)Using a thin, sharp punch, remove the cup plug (25, Figure 9-2) from the rocker arm shaft (11).WARNINGDry cleaning solvent PD-680, Type III, or equivalent, is flammable, and moderately toxic to theskin, eyes, and respiratory tract. Assure adequate ventilation. Skin, eye, and respiratoryprotection Is required to avoid Injury to personnel.WARNINGCompressed air used for cleaning or drying can create airborne particles that may enter theeyes. Pressure shall not exceed 30 psi (207 kPa). Wearing of goggles Is required to avoidInjury to personnel.(2)Flush the bore of the rocker arm shaft (11) thoroughly with dry cleaning solvent, PD-680, Type III, orequivalent, and blow dry with compressed air.(3)Using a 0.156 inch (3.96 mm) diameter pin punch, install a new cup plug (25) in the rocker arm shaft (11).(4)If worn beyond the limits given in Table 1-4, replace the bushings (27 and 28) in the rocker arms (12, 13,and 14) using mandrel ST-1 284 and an arbor press.(5)Remove minor scoring or wear damage to the crosshead contact surface of the rocker arms (12 and 14) bygrinding to the original contour using ST-684 or equivalent. After grinding, dean thoroughly and be surethe oil passage hole in the contact surface is not obstructed.(6)Replace worn injector lever socket seats (26) as follows:(a)Drill a 0.125 inch (3.2 mm) hole through the injector rocker arm (1 3) centered on and above thesocket seats (26). Drive out the socket using a suitable pin punch.(b)Remove all chips and burrs caused by drilling, and plug the hole drilled in the injector rocker arm(13) using a blind pull rivet MS20600-AD4W2.(c)Install a new ball socket seat (26) in the injector rocker arm (13) using a soft drift and hammer. Besure the socket seat is firmly seated.(7)Replace all worn adjusting screws (16) and nuts (15).(8)Remove minor defects in gasket surfaces of the rocker arm housing (20) using a flat mill file. Discard thehousing for all other defects.(9)Replace worn adjusting screws (10, Figure 9-1) and nuts (9) in the crossheads (8). Discard the crossheadsfor all other defects.e.Replace. Replace the rocker arm housings, crossheads, rocker arms, and valve covers in accordance withparagraph 9-10.9-14. PUSH RODS AND FOLLOWERS MAINTENANCE.a.Inspect. (See Figure 9-13.)(1)Remove the cam follower covers in accordance with step b, below.(2)Rotate the engine to line up one set of valve set marks, and rotate push rods (1 and 2) by hand whilefeeling for roughness, and visually checking for push rod runout. Runout shall not exceed 0.025 inch (0.64mm).(3)Rock the cam followers (12 and 13) from side-to-side while feeling for excess play between the camfollowers and shaft (14). Clearance shall not exceed 0.004 inch (0.10 mm).(4)Rotate the cam follower rollers (18 and 20), and visually inspect for wear, scoring, galling, flaking, orchipping.NOTEIf galling, flaking, or chipping of the rollers is noted, the mating camshaft lobe should becarefully inspected in accordance with paragraph 9-15.(5)Rotate the cam follower rollers (18 and 20) and check for binding, excessive clearance between the rollersand pins (17 and 19), and excessive side clearance. The clearance between the rollers and pins shall notexceed 0.008 inch (0.20 mm), and side clearance shall not exceed 0.024 inch (0.61 mm).9-25
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