Piston and connecting rod assemblies

4

Big end bearing and cap

To remove and to fit

Operation 4-1

Special requirements

Torque Nm (lbf ft) kgf m

Clearance mm (in)

102-05, 103-07

23 (17) 2,3

32 (24) 3,2

52 (38) 5,3

Standard

Service limit

103-10

0,1 - 0,3 (0.004 - 0.012)

0,7 (0.276)

103-13, 103-15, 104-19, 104-22

Ensure that when the connecting rods are fitted an axial play (clearance) is provided.

During assembly apply a thin layer of clean engine lubricating oil to the crank pins with.

Notes:

Identify each rod/piston/cylinder pair on disassembly.

For emissions approved engines. The fuel adjustment screws must not be altered from the original settings.

For emissions approved engines. The maximum No Load Speed must be checked after assembly.

If new connecting rods are fitted, see Operation 3-13.

Workshop Manual, TPD 1377E, issue 4

49

This document has been printed from SPI². Not for Resale

4

100 Series

Piston and connecting rod

To dismantle and to assemble

Operation 4-2

Align Shibaura logo (A1) with stamped number on con rod.

Align numbers to match (A2).

1

2

50

Workshop Manual, TPD 1377E, issue 4

This document has been printed from SPI². Not for Resale

4

100 Series

To fit

Operation 4-3

Special requirements

Torque Nm (lbf ft) kgf m

102-05, 103-07

103-10

23 (17) 2,3

103-13, 103-15, 104-19, 104-22

52 (38) 5,3

32 (24) 3,2

For positioning of connecting rod assembly refer to Operation 4-2.

Note:  Pistons must be fitted with Shibaura name toward the fuel injection pump.

Workshop Manual, TPD 1377E, issue 4

51

This document has been printed from SPI². Not for Resale

4

100 Series

Piston and piston ring

To inspect

Operation 4-4

Any letters or marks on a surface of a ring (A1) will always be to the upper face.

The piston profile shows the No.1 ring (A2), No.2 ring (A3) and the oil scraper ring (A4).

1

2

3

4

52

Workshop Manual, TPD 1377E, issue 4

This document has been printed from SPI². Not for Resale

4

100 Series

To measure piston ring clearance

Operation 4-5

By use of feeler gauges, measure the clearance between the piston ring groove and ring. If the clearance

exceeds the service limit, renew the piston and rings.

102-05, 103-07, 103-10

Clearance mm (in)

Standard

103-13, 103-15, 104-19, 104-22

Clearance mm (in)

Piston ring

Service limit

Piston ring

Standard

Service limit

0,06 - 0,1

(0.0024 - 0.0039)

0,25

(0.0098)

0,07 - 0,11

(0.0028 - 0.0043)

0,25

(0.0098)

No. 01 ring

No. 01 ring

0,05 - 0,09

(0.0020 - 0.0035)

0,25

(0.0098)

0,04 - 0,08

(0.0016 - 0.0032)

0,25

(0.0098)

No. 02 ring

No. 02 ring

0,02 - 0,06

(0.0008 - 0.0024)

0,15

(0.0059)

0,02 - 0,06

(0.0008 - 0.0024)

0,15

(0.0059)

Oil control ring

Oil control ring

Workshop Manual, TPD 1377E, issue 4

53

This document has been printed from SPI². Not for Resale