INSPECTION - TM-10-4320-310-14

TM-10-4320-310-14 Pump Unit Flammable Liquid Centrifugal Self-Priming 2-Inch 100 GPM Diesel Engine Driven NSN 4320-01-263-3604 Manual
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TM 10-4320-310-14 6-3. REPAIR/REPLACE CONNECTING ROD (Continued) INSPECTION: . Dry cleaning solvent P-D-680 (safety or Stoddard's Solvent) is potentially dangerous. Avoid repeated and prolonged breathing of vapors and skin contact with the liquid. Do not use near open flame, arcing equipment, or other ignition sources. Always wear eye protection and protective clothing. The flash point of P-D-680 is 100°F to 138°F (38°C to 59°C). Death or serious injury could occur if compressed air is directed against the skin. Do not use compressed air for cleaning or drying unless the pressure is/has been reduced to 30 psi (2.06 bar) or less. When working with compressed air always use chip guards, eye protection, and other personal equipment. 1 Clean connecting rod components with dry cleaning solvent. Remove any carbon deposits with a wire brush. Clean inside surface of rod bushing (9), both connecting rod halves (6 and 7) , and bearing (8). Blow compressed air through the drilled oil passage in connecting rod to clean connecting rod and rod bushing. 2 Visually inspect connecting rod for bending, warping, cracking, rust, or other damage. Replace if twisted or bent. Grind or replace if cracked. 3 Measure and record rod bushing (9) inside diameter. Measure at points 1 and 2 along axis A and B. Measurements should be 0.9951 to 0.9858 inch (25.225 to 25.040 mm). If any measurement is outside these limits, replace rod bushing. 4 Inspect upper and lower bearing halves (8) for excessive wear, scoring, pitting, flaking, etching, and signs of overheating. Inspect bearing backs for bright spots (bearing moving in supports). Replace if excessively worn, scored, pitted, etched, or signs of overheating are noted. 5 Temporarily assemble connecting rod with two new hexagon socket head cap screws and without bearing halves. Using a torque wrench, tighten screws to 29.50 foot pounds (40 N-m). Apply some oil to threads and contact surfaces. 6 Measure inside diameter of connecting rod bearing bore. Measurement should be 1.8114 to 1.8107 inches (46.010 to 45.994 mm). If measurement is outside specified limits, replace connecting rod. 6-7

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