Mitsubishi S6R2 Series User Manual

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Chapter 6 INSPECTION AND REPAIR OF BASIC ENGINE
5.6 Width of Crankpin and Rearmost Crank Main Journal - Measure
(1) Inspect the ends of crankshaft for harmful flaw and
wear.
(2) Measure the crankpin and rearmost crank main journal
width.
When using oversize thrust plate due to wear of rear-
most crank journal width, grind the crankshaft for use
with oversize thrust plate.
Width of Crankpin and Rearmost Crank Main Journal -
Measure
5.6.1 Rearmost Crank Main Journal Width - Grind
When using the oversize thrust plate, grind the rearmost
crank journal width for use with oversize thrust plate.
Do not change the fillet radius when grinding. Quench the
crankshaft if its surface hardness is significantly decreased,
and after quenching do the magnetic particle inspection.
Ensure that the finishing surface roughness after grinding is
in the standard value.
Note: The difference of thickness between front and rear
thrust plates must be 0.25 mm [0.0098 in.] or less.
Rearmost Crank Main Journal Width - Grind
Crankpin width
Rearmost crank journal width
ٖٖٖٖ
ٖٖٖ
ٖٖٖ
0.8S
3.2S
3.2S
Fillet radius
R8.5
Fillet radius
R8.5
Item Nominal value Size Standard value
Crankpin width 67 mm [2.64 in.] - 67.20 to 67.30 mm [2.6457 to 2.6496 in.]
Rearmost crank journal width 66 mm [2.60 in.]
Standard 66.00 to 66.05 mm [2.598 to 2.600 in.]
Over size
0.25 mm [0.0098 in.] 66.25 to 66.30 mm [2.6083 to 2.6102 in.]
0.50 mm [0.0197 in.] 66.50 to 66.55 mm [2.6181 to 2.6201 in.]
0.75 mm [0.0295 in.] 66.75 to 66.80 mm [2.6279 to 2.6299 in.]
1.00 mm [0.0394 in.] 67.00 to 67.05 mm [2.6378 to 2.6398 in.]
1.25 mm [0.0492 in.] 67.25 to 67.30 mm [2.6476 to 2.6496 in.]
1.50 mm [0.0591 in.] 67.50 to 67.55 mm [2.6575 to 2.6594 in.]

Mitsubishi S6R2 Series Specifications

General

Brand	Mitsubishi
Model	S6R2 Series
Category	Engine
Language	English