3. TROUBLESHOOTING
48
③
Heck connecting rod
If connecting rod bending, twisting or big end shaft bush and small end outer ring movement
or crack on one side, should be rejected and replaced with
new one.
a) Check small end diameter
If out of the standard or exceed service limit, replace the
connecting rod.
Standard Service
Limit
20.005mm 20.07mm
b) Check big end diameter
If out of the standard or exceed service limit, replace the connecting
rod.
Standard Service
Limit
36.025mm 36.07mm
④
Camshaft check
The camshaft is main driving part of the train valve mechanism, which controls the intake
and exhaust valves opening and closing.
Feature: The shaft is equipped with cam and journal which can control intake and exhaust.
When operating, camshaft operating face and lifter will be badly rubbed from periodically
impacting and easily be damaged. So, the camshaft shall be wearable and lubrication well.
