Page 45 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

EXERCISE 2.9: Practice on removing rocker arm assembly

and manifolds

Objectives

At the end of this exercise you shall be able to
• remove the rocker arm assembly from the cylinder head
• remove the manifolds from the cylinder head.

Requirements

Tools/Instruments Materials/Components
• Trainee’s tool kit - 1 No. • Tray - 1 No.
• Box Spanner set - 1 No. • Cotton waste - as reqd.
• Wire brush, scrapper - 1 No. • Soap oil - as reqd.
• Lube oil - as reqd.
Equipments/Machines
• Gasket - as reqd.
• Multi cylinder diesel engine - 1 No.

Procedure

TASK 1: Removing rocker arm assembly
• Remove the head cover (value door)
• Remove the mounting nuts of the rocker shaft supports.
• Takeout the rocker shaft along with supports in the horizontal position.

• Ensure that the shaft does not tilt to avoid bending and breakage of the shaft.
• Place the rocker arm assembly on the work bench in tray
• Clean the rocker arm assembly with specified cleaning solvent. (avoid to prevent damage the valves and
rocker arms during removing and cleaning the rocker arm assembly)

TASK 2: Removing the inlet and exhaust manifold from the cylinder head (Fig 1)

• Remove the exhaust manifold flange nuts and bolts. Fig 1
• Disconnect the exhaust pipe line from exhaust manifold.
• Loosen the exhaust manifold mounting bolts.
• Remove the turbo charger before loosen the exhaust
manifold mountings.
• Remove the manifold mountings and take out from the
cylinder head and place it on the work bench.
• Remove the air cleaner or air intake hose from the inlet
manifold
• Loosen mounting bolts of inlet manifold.
• Remove the inlet manifold mounting bolts and take out
from the cylinder head and place it on the work bench.

• Ensure the manifold are safety placed on the work bench.
• Visually inspect the manifolds for any damages on the manifold.
• If any damages found make repair and clean it thoroughly.

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