Service Manual

CAMSHAFT/CRANKSHAFT 7-15
Camshaft, Tappet
Camshaft Assembly
•
Install the governor assembly (see Governor Assembly
Installation in the Fuel System chapter).
•
After assembling the camshaft, check the following items.
○
The governor plate [A] must move freely.
○
While shaking the camshaft, check if the ACR weight [B]
swings smoothly.
Camshaft Inspection
•
Check the camshaft gear [A] for pitting, fatigue cracks,
burrs or any evidence of improper tooth contact.
Replace the camshaft with a new one if necessary.
•
Check the top of the cam lobes [B] for wear, burrs or un-
even contact.
Replace the camshaft with a new one if necessary.
Camshaft Bearing/Journal Wear
•
Measure the height [A] of each cam lobe.
If the cam height is less than the service limit for either
lobe, replace the camshaft with a new one.
Cam Lobe Height
Service Limit:
Inlet 29.36 mm (1.156 in.)
Exhaust 29.36 mm (1.156 in.)
•
Me
asure both camshaft journal diameter [A] at several
points around the journal circumference.
If the journal diameter is less than the service limit, re-
place the camshaft with a new one.
Camshaft Journal Diameter
Service Limit:
PTO Side 15.99 mm (0.630 in.)
Flywheel Side 15.99 mm (0.630 in.)
•
Measure the inside diameter [A] of the camshaft insert on
the crankcase at several points.
If the inside diameter is more than the service limit, re-
place the crankcase with a new one.
Camshaft Bearing Inside Diameter (Crankcase)
Service Limit: 16.119 mm (0.6346 in.)