NMWR-9-2815-220 Overhaul Manual for M60 M88 Engine AVDS-1790-2CA, AVDS-1790-2DA, AVDS-1790-2DR Download
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NMWR 9-2815-220 CYLINDER ASSEMBLY OVERHAUL—Continued 0012 00 Table 8. Overhaul Inspection Procedure for Intake Engine Poppet Valve (OIP 10951239) (Item 12, Figure 15). QA NO. REF CHARACTERISTIC INSP. REQUISITE REQ. LTR. METHOD 3 1 Scratches, nicks, or Visual None allowed gouges on contact surfaces. Pitting, imperfect seating, warping, heavy discoloration, burning, erosion, and heavy carbon deposits on valve face 2 Damaged locking grooves Visual None allowed 3 A Outside diameter of intake Measure 0.4975 – 0.4980 in. valve stem (12.6365 – 12.6492 mm) 4 B Angle of intake valve seat Measure Angle must be no less than 74° – with valve stem 45’ or no greater than 75° – 15’ 5 C Width of locking groove Measure 0.1560 – 0.1660 in. (3.9624 – 4.2164 mm) 6 D Length – gage line to end Measure 6.3550 – 6.3690 in. of stem (161.4170 – 161.7726 mm) 7 E Circular runout of seat Measure At diameter of 2.4000 in. (60.96 angle mm). Runout to be less than 0.001 to “A” diameter. 8 Fit of intake valve stem in Measure 0.0015L – 0.0030L in. guide (0.0381L – 0.0762L mm) GAGE LINES D E A C B 0012 00-30 Change 1