TM9-2320-361-34 1 15-10. DISCHARGE VALVE REPAIR (M50A2) (Contd) I b. Cleaning and Inspection 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 15-38 Wash all parts with soap and hot water. Rinse all parts with hot water and dry using a clean, soft rag. Table 15-1. Discharge Valve Wear Limits. ITEM WEAR LIMITS/TOLERANCES NO. lTEM/POINT OF MEASUREMENT STANDARD METRIC 2 Upper plunger (bonnet end diameter) 0.48-0.51 in. 12.19-12.95 mm 3 Bonnet (plunger hole diameter) 0.50-0.51 in. 12.70-12.95 mm 4 Spring Free length 5.18-5.43 in. 131.6 -137.9 mm Compressed to 2.43 in. (61.7 mm) 22-28 lb-in. 2.5- 3.2 N.m 5 Plug (stem hole diameter) 0.65-0.66 in. 16.51-16.76 mm 8 Cam stem: Inside stem bore end diameter 0.42-0.43 in. 10.67-10.92 mm Plug end diameter 0.644-0.648 in. 16.36-16.46 mm Machined with square 0.49-0.50 in. 12.44-12.70 mm 9 Lower plunger (length) 3.23-3.26 in. 82.64-82.80 mm 10 Discharge valve housing Inside stem bore/inner diameter 0.43-0.44 in. 10.67-11.18 mm Outer stem bore/inner diameter 0.65-0.66 in. 16.51-16.76 mm Inspect discharge valve housing (10) for scoring, cracks, or thread and mating surface damage and wear. Refer to table 15-1, Discharge Valve Wear Limits, for measurements. Replace if damaged or worn past limits. Inspect bonnet (3) for cracks, thread damage, and wear at plunger hole. Refer to table 15-1, Discharge Valve Wear Limits, for measurements. Replace bonnet (3) if damaged or worn past limits. Inspect upper plunger (2) for wear, bends, cracks, and thread damage. Refer to table 15-1, Discharge Valve Wear Limits, for measurements. Replace upper plunger (2) if damaged or worn past limits. Inspect lower plunger (9) for wear, bends, cracks, and thread damage. Refer to table 15-1, Discharge Valve Wear Limits, for measurements. Replace lower plunger (9) if damaged or worn past limits. Inspect nut (1) for thread and mating surface damage. Replace if damaged. Inspect cam (7) for mating surface damage at lower plunger. Replace if damaged. Inspect cam stem (8) for bends, cracks, and machined surface wear. Refer to table 15-1, Discharge Valve Wear Limits, for measurements. Replace cam stem (8) if damaged or worn past limits. Inspect plug (5) for wear and thread damage. Refer to table 15-1, Discharge Valve Wear Limits, for measurements. Replace plug (5) if damaged or worn past limits. Inspect lever arm (6) for cracks or pinhole damage. Replace if damaged. Inspect spring (4) for collapsed coils or breakage. Replace if damaged. Inspect spring (4) length. Refer to table 15-1, Discharge Valve Wear Limits, for measurements. Replace sping (4) if worn past limits.