TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Cylinder Block (001-026)
Section 1 - Cylinder Block - Group 01
Page 1-67
NOTE: Be sure to remove the covering from the piston
cooling nozzles.
Remove the protective tape and cloth, and clean the crank-
shaft journals.
WARNING
When using solvents, acids, or alkaline materials for
cleaning, follow the manufacturer's recommendations
for use. Wear goggles and protective clothing to avoid
personal injury.
Use a solvent and a brush to clean any residue that pos-
sibly has splashed on the camshaft.
Inspect the camshaft lobes and tappet faces for signs of
wear or damage. Refer to Procedure 001-008.
Inspect for Reuse (001-026-007)
Measure the cylinder bore diameter at 25.4 mm [1 in] and
170.7 mm [6.7 in] from the top of the cylinder block.
Bore I.D. Max - 102.116 mm [4.0203 in]
Bore out of round - 0.035 mm [0.0014 in]
Bore taper - 0.076 mm [0.003 in]
NOTE: Do not proceed with in-chassis overhaul if the cyl-
inder bores are worn beyond specifications.
Assemble (001-026-025)
Install the piston and connecting rod assemblies. Refer to
Procedure 001-054.
L-745
