[4] CRANKSHAFT; Clearance between Piston Ring and Groove; Side Clearance of Crankshaft- Page 234

ENGINE

L3560, L4060, L4760, L5060, L5460, L6060, WSM

1-S87

Clearance between Piston Ring and Groove

1. Clean the rings and the ring grooves, and install each ring in its

groove.

2. Measure the clearance between the ring and the groove with a

feeler gauge or depth gauge.

3. If  the  clearance  is  more  than  the  allowable  limit,  replace  the

piston ring.

4. If the clearance stays more than the allowable limit with new

ring, replace the piston also.

* D1803-CR-TE4 and V2403-CR-TE4 are key stone type.

9Y1210824ENS0095US0

[4] CRANKSHAFT

Side Clearance of Crankshaft

1. Set a dial indicator with its point on the end of the crankshaft.

2. Move the crankshaft to the front and rear to measure the side

clearance.

3. If the measurement is more than the allowable limit, replace the

thrust bearings.

4. If the same dimension bearing is not applicable because of the

crankshaft journal wear, replace it with an oversize one. Refer

to the table and figure.

(Reference)

• Oversize dimensions of crankshaft journal

9Y1210824ENS0096US0

Top ring

Factory 

specifica-

tion

D1803-CR-E4, 

V2403-CR-E4

0.050 to 0.090 mm

0.0020 to 0.0035 in.

Allowable 

limit

D1803-CR-E4, 

V2403-CR-E4 

0.20 mm

0.0079 in.

Second ring

Factory 

specifica-

tion

V2403-CR-TE4

0.0930 to 0.128 mm

0.00367 to 0.00503 in.

D1803-CR-E4

V2403-CR-E4 

0.0780 to 0.110 mm

0.00307 to 0.00433 in.

Allowable limit

0.20 mm

0.0079 in.

Oil ring

Factory 

specifica-

tion

V2403-CR-TE4

0.020 to 0.060 mm

0.00079 to 0.0023 in.

D1803-CR-E4

V2403-CR-E4 

0.030 to 0.070 mm

0.0012 to 0.0027 in.

Allowable limit

0.15 mm

0.0059 in.

Side clearance of 

crankshaft

Factory specification

0.15 to 0.31 mm

0.0059 to 0.012 in.

Allowable limit

0.5 mm

0.02 in.

Oversize

0.2 mm

0.008 in.

0.4 mm
0.02 in.

Dimension 

A

54.50 to 54.70 mm

2.146 to 2.153 in.

54.60 to 54.80 mm

2.150 to 2.157 in.

Dimension 

B

26.20 to 26.25 mm

1.032 to 1.033 in.

26.40 to 26.45 mm

1.040 to 1.041 in.

Dimension 

C

2.8 to 3.2 mm radius

0.11 to 0.12 in. radius

2.8 to 3.2 mm radius

0.11 to 0.12 in. radius

The crankshaft journal must be fine-finished to higher than Rmax = 0.4S

KiSC issued 03, 2016 A