TM 10-4320-344-24
4.4.22 Crankcase Maintenance, Models 609-C and US636HCCD-1. (Continued)
To prevent the possibility of embedding foreign objects in the eyes, safety
glasses must be worn when using compressed air.
b.
c .
d.
e .
f .
g .
h.
i .
j .
k.
l .
m.
Remove crankcase (1) from tank of cleaning solvent and using compressed air,
dry thoroughly.
Place crankcase (1) on suitable engine stand and remove
d e v i c e.
Inspect crankcase (1) for cracks, leaks, or damage. If
leaking, or damaged, replace crankcase.
s l i n g a n d l i f t i ng
crankcase is cracked,
Inspect cylinder bores and cylinder seating surface of crankcase (1) for
scoring, burrs, discoloration, pits, or damage.
If scoring, burrs,
discoloration, pits, or damage is present, replace crankcase (1).
Inspect deflector plate (15) for bends, cracks, or deformations.
Inspect for leaks around oil dipstick bushing (19).
If leaks are present,
remove oil dipstick bushing (19), apply sealant to oil dipstick bushing (19)
and install in crankcase (1).
Inspect for leaks around plugs (20 and 21).
If leaks are present, remove
plugs (20 and 21), apply sealant to plugs (20 and 21) and install in crankcase
( 1 ).
Inspect sleeve bushing (22) for bends, cracks, or deformations.
Inspect all components for damage.
Install crankshaft bearing caps in accordance with the installation procedure
given in paragraph 4.4.20 and using micrometer, check crankshaft bearing
journal bores for the dimensions listed in Table 4-18.
If the journal bores
do not meet the specifications, discard crankcase.
Table 4-18.
Crankshaft Bearing Journal Bore Dimensions.
Mode 1
Dimensions
609-c
3.0512-3.0519 inches (77.500-77.519 mm)
US636HCCD-1
3.1102-3.1110 inches (79.000-79.019 mm)
Inspect cylinder seat surfaces of crankcase (1) for scratches, burrs, pits, or
damage.
If damage is present, resurface damaged cylinder seat surfaces of
crankcase (1) using refacing device.
Replace all damaged components.
On Model 609-c install six new lock washers and oil nozzles in the bearing webs
of the crankshaft bearings.
a .
Install new camshaft bearing bushing (18). Ensure oil hole in camshaft
bearing bushing (18) is in line with oil hole in crankcase (1).
b .
Install flat washer (17) and plug (16).
4-82
4.4.22.3 Installation.
NOTE
