TM  10-3930-638-24&P 4-2.   ENGINE   MAINTENANCE   (cont) f. Pistons and Connecting Rods (cont). STEP LOCATION ITEM ACTION REMARKS INSPECTION   (cont) 12 NOTE (cont) Avoid mixing liners (12), connecting rods (3), and connecting rod caps (2). Inspect one group at a time. c. Connecting rod nuts Remove Check  for  damaged  threads  and  distortion; (1) and screws (11) if  distorted  or  threads  damaged  replace part d. Bearing liners (12) Remove  and Slide liners out. Check for scoring, pitting, inspect flaking, cracking, or signs of overheating. Replace if any of these conditions observed e. Connecting rod cap Install On corresponding connecting rod (3) to (2),  screws  (11), avoid mixing caps (2) and nuts (1) REASSEMBLY 13 Piston (4) a. Connecting rod (3) Position In piston, Numbered side of rod facing toward arrow side of piston b. Piston pin (9) Install Use  hand  pressure c. Two retaining Install ‘ Use needle nose pliers rings  (8) CAUTION Use piston ring expander to install piston rings to prevent damag- ing rings or piston. d. Piston oil ring (7) Install In piston third groove e.  Second  piston Install in piston second groove ring (6) f. Top piston ring (5) Install In piston first groove g. Piston rings (5, 6, Position Rotate so that ring end gaps are 120 de- and 7) grees  apart h. Two connecting Remove rod nuts (1) i. Connecting rod Remove cap (2) 4-48