Connecting rod alignment and bearings
(1)
Check the connecting rod for evidence of cracks,
especially cracks in the fillets of its small and big
ends. Replace the rod if any cra1:k is noted in the
fillets.
(2) Mount each connecting rod in the connecting rod
aligner and check for bend and twist as shown
below. In a twisted connecting rod, the bearing
is not trued to the small end bushing. Such a rod
must be corrected with the use of a press.
(3) If the connecting rod aligner is not available, the
rod may be checked as follows:
(a) To check the rod for bend, measure "C" and
"2" as shown in the figur� "a." If the measure
ment at "C" is larger than 0.05 mm per 100 mm
(0.00197 in. per 3.937 in.) of" 2," straighten
the rod with the use of a press.
(b) To check the rod for twist, measure "C" as
shown in the figure "b." If the measurement at
"C" is larger than 0.05 mm per 100 mm
(0.00197 in. per 3.937 in.) of "2," correct the
rod.
C
f <o.os
e
100
a. Checking the connect·
ing rod for bend
b. Checking the connect·
ing rod for twist
Checking connecting rod
Checking connecting rod for bend
Checking connecting rod for twist
