Page 73 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

EXERCISE 2.24: Measure the cylinder bore taper, ovality

and flatness

Objectives

At the end of this exercise you shall be able to
• check cracks and flatness of cylinder block
• check taper and ovality of cylinder bore and clean oil passages.

Requirements

Tools/Instruments Materials/Components
• Trainee’s tool kit - 1 No. • Tray - 1 No.
• Straight edge, Feeler gauge - 1 No. • Banian cloth - as reqd.
• Bore dial gauge - 1 No. • Kerosene - as reqd.
Equipments/Machines • Soap oil - as reqd.
• Lube oil - as reqd.
• Engine cylinder block - 1 No.
• Air compressor, Water washer - 1 No.

Procedure

TASK 1: Check flatness of cylinder block with straight edge
• Place the cylinder block on two wooden blocks.

• Clean the top plain surface of the cylinder block.
• Wipe the plain surface with clean banian cloth.
• Keep the straight edge on the surface of the cylinder block and press the straight edge at the centre with your
left hand.

• Insert the feeler gauge leaves between the straight edge and the surface of the cylinder block (Fig 1).

Fig 1

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