Measuring The Crankshaft For Bend; Removing The Crankshaft Gear; Installing The Crankshaft Gear - Mitsubishi diesel engines Service Manual

(a) If any of the crank journals need grinding,
grind all crank journals on the same
crankshaft to the same dimension.
(b) Finish the fillets to a radius of 2.5 mm (0.098
in.).

3.9 Measuring the crankshaft for bend

Support the crankshaft at the front and rear crank
journals with a V block. Using a dial gauge,
measure the center journal for a swing of the
gauge needle (to both directions).
measured value moderately exceeds the standard
value, correct the bend by grinding.
measured value far exceeds the standard value,
correct the bend using a press or other similar
equipment.
If the measured value exceeds the limit, replace
the crankshaft.
Standard value
Crankshaft bend 0.025 (0.0010)

3.10 Removing the crankshaft gear

Use a gear puller to remove the crankshaft gear.
Note: Do not remove the crankshaft gear unless the
crankshaft or the gear is faulty.

3.11 Installing the crankshaft gear

(1) Install the key to the crankshaft.
(2) Align the keyway in the crankshaft gear with the
key on the crankshaft, and press-fit the gear fully
until it stops.
ENGINE MAIN PARTS - INSPECTION AND CORRECTION
If the
If the
Unit: mm (in.)
Limit
0.050 (0.0020)
Gear puller
R2 mm
(0.08 in.)
Finished radius dimension of fillet
Measuring the crankshaft bend
Removing the crankshaft gear
Align these
Installing the crankshaft gear
R2 mm
(0.08 in.)
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