TM 10-4320-344-24
h.
Place piece of plastic gauge material the full width of lower bearing (3),
about 0.250 inches (6.350 mm) off-center.
i .
Install connecting rod cap (2) and two cap screws (1). Torque cap screws (1)
to 70 ft-lbs (95 N•m).
j. Remove two cap screws (1) and connecting rod cap (2).
Figure 4-23. Boaring Clearance Measurement, Model 609-A.
k.
Flattened plastic gauge material (Figure 4-23, 1) will be sticking to either
lower bearing (2) or crankshaft.
Required clearance for new parts is 0.001-0.003 inches (0.0254-
0.0762 mm).
Maximum allowable clearance for used parts is 0.005 inches (0.1270
mm)
l .
Measure width of flattened gauge material (1) at its widest point as shown in
Figure 4-23.
Coat upper and lower bearing shells with engine assembly grease.
m .
If clearance is within required limits, remove limits, remove gauge material (1) and install
connecting rod bearing (Figure 4-19, 3), cap (2), and cap screws (1). Torque
cap screws to 70 ft-lbs (95 N•m) and remove tags.
Connecting rod side clearance should be 0.005-0.012 inches (0.127-
0.305 mm) with maximum clearance of 0.020 inches (0.508 nun).
n.
Check connecting rod (12) side clearance.
o .
Repeat steps a through n for five remaining piston and connecting rod
assemblies.
4-49
NOTE
NOTE
NOTE
