NMWR-9-2815-220 Overhaul Manual for M60 M88 Engine AVDS-1790-2CA, AVDS-1790-2DA, AVDS-1790-2DR Download
Page 219 of 1014
NMWR 9-2815-220 CYLINDER ASSEMBLY OVERHAUL—Continued 0012 00 Table 7. Overhaul Inspection Procedure for Exhaust Engine Poppet Valve (OIP 11610010) (Item 11, Figure 15). QA NO. REF. CHARACTERISTIC INSP. REQUISITE REQ. LTR. METHOD 1 Scratches, nicks, or gouges Visual None allowed 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 Measure 0.5570 – 0.5580 in. exhaust valve stem (14.1478 – 14.1732 mm) 4 B Angle of exhaust valve seat Measure Angle must be no less than 45° – with valve stem 00’ or no greater than 45° – 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 of Measure 7.0100 – 7.0240 in. stem (178.0540 – 178.4096 mm) 7 E Circular runout of seat Measure At diameter of 2.0870 in. (53.0009 angle mm). Runout to be less than 0.001 to “A” diameter. 8 Fit of exhaust valve stem in Measure 0.0035L – 0.0055L in. guide (0.0889L – 0.1397L mm) GAGE LINES D C E A B 0012 00-29 Change 1