Mitsubishi S4Q2 User Manual

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Service Manual Mitsubishi SQ-Series diesel engines
Version 08/2004
PISTONS, CONNECTING RODS,
CRANKSHAFT AND CRANKCASE
ENGLISH
ENGINE MAIN PARTS
4. Checking crankshaft deflection
Support the crankshaft on its front and rear
journals in V-blocks. With the dial indicator set at
0.00 mm [0.0000 in.] at the center journal, turn the
camshaft full one revolution and read the indicator,
as shown in the illustration. If deflection is out of
the assembly standard but does not exceed the
repair limit, repair the crankshaft by grinding. If
deflection exceeds the repair limit, repair the
crankshaft by cold working. Replace the crankshaft
if runout exceeds the repair limit excessively.
Unit: mm [in.]
5. Removing crankshaft gear
Remove the crankshaft gear with a gear puller, as
shown in the illustration.
6. Installing crankshaft gear
1) Heat the gear in an oven to a temperature of
100°C to 150°C [212°F to 302°F].
2) Install the key to the crankshaft.
3) Install the gear by fitting the key into the
keyway in the gear.
Figure 128 Checking crankshaft deflection
Item
Assembly
Standard
Repair Limit
Crankshaft
deflection
0.02 [0.0008] or
less
0.05
[0.0020]
Figure 129 Removing crankshaft gear
NOTE
Do not remove the gear unless it requires
replacement.
Figure 130 Installing crankshaft gear
Fit key into keyway

Mitsubishi S4Q2 Specifications

General

Brand	Mitsubishi
Model	S4Q2
Category	Engine
Language	English