Filter
Top Products
ENGINE BOTTOM END/TRANSMISSION 7-11
Crankshaft, Connecting Rod
Connecting Rod Big End Radial Clearance Inspection
•
Set the crankshaft in a flywheel alignment jig or on V
blocks, and place a dial gauge against the connecting rod
big end.
•
Push the connecting rod first towards the gauge and then
in the opposite direction. The difference between the two
gauge readings is the radial clearance.
If the radial clearance exceeds the service limit, the crank-
shaft should be either replaced or disassembled and the
crankpin, needle bearing, and connecting rod big end ex-
amined for wear.
Connecting Rod Big End Radial Clearance
Standard:
0.025 ∼ 0.037 mm
Service L imit:
0.09 mm
Connecting Rod Big End Seizure Inspection
In case of serious seizure with damaged flywheels, the
crankshaft must be replaced.
In case of less serious damage, disassemble the crank-
shaft and replace the crankpin, needle bearing, side
washers, and connecting rod.
Connecting Rod Big End Side Clearance Inspection
•
Measure the side clearance [A] of the connecting rod with
a thickness gauge.
If the clearance exceeds the service limit, replace the
crankshaft.
Connecting Rod Big End Side Clearance
Standard: 0.35 ∼ 0.45 mm
Service Limit: 0.65 mm
Crankshaft Runout Inspection
•
Set the crankshaft in a flywheel alignment jig or on V
blocks, and place a dial gauge against the points indi-
cated.
•
Turn the crankshaft slowly. The maximum difference in
gauge readings is the crankshaft runout.
If the runout at either point exceeds the service limit, align
the flywheels so that the runout falls within the service
limit.
Crankshaft Runout
Standard: Not more than 0.03 mm
Service Limit: 0.05 mm
[A]:
7.5 mm