Page 41 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

EXERCISE 2.7: Removing and checking the camshaft

Objectives

At the end of this exercise you shall be able to
• remove and inspect camshaft from the engine
• check cam shaft bend and twist
• inspect cam lobe and journal
• measure cam lobe height.

Requirements

Tools/Instruments
• Trainee’s tool kit - 1 No. • Surface table - 1 No.
• Mallet - 1 No. Materials/Components
• Feeler gauge, - 1 No.
• Outside micrometer - 1 No. • Tray - 1 No.
• Dial test indicator - 1 No. • Cotton cloth - as reqd.
• ‘V’ block - 2 No. • Kerosene - as reqd.
• Soap oil - as reqd.
Equipments/Machines • Lube oil - as reqd.
• Multi cylinder diesel engine - 1 No.

Procedure

• Remove the bolts (1) retaining the camshaft thrust plate and remove thrust plate (Fig 1)
• Support the camshaft and carefully slide the journals through each bearing. Avoid contact of the surface with
cam lobe and pull out the camshaft. (Fig 2)

Fig 1 Fig 2

• Clean the camshaft thoroughly.

• Inspect the camshaft journals for scratches, grooves and pitting marks.
• Measure each journal for ovality, taper and wear.
• Check camshaft for bend and twist with dial test indicator
• Check cam lobes surface for wear. (Fig 3)

• Measure diameter of the base circle (1) of camshaft with a micrometer.

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