3. TROUBLESHOOTING
55
③
Check 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.
Type
Standard
Service Limit
R2200/R2800
18.006mm
18.07 mm
R3000
18.002mm
18.017 mm
b) Check big end diameter
If out of the standard or exceed service limit, replace the connecting rod.
④
Camshaft check
The camshaft is main driving part of the train valve
mechanism, which control 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.
Type
Standard
Service Limit
R2200/R2800
30.02mm
30.066mm
R3000
30.215mm
30.225mm