Page 58 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

EXERCISE 2.17: Practice on removing piston with

connecting rod assembly

Objectives

At the end of this exercise you shall be able to
• remove the big end bearing from the connecting rod
• remove the piston with connecting rod.

Requirements

Tools/Instruments Materials/Components

• Trainee’s tool kit - 1 No. • Tray - 1 No.
• Torque wrench, Ring expander - 1 No each. • Cotton cloth - as reqd.
• Mallet, Drift punch - 1 No. • Kerosene - as reqd.
Equipments/Machines • Soap oil - as reqd.
• Lube oil - as reqd.
• Multi cylinder diesel engine - 1 No. • Wooden block - as reqd.

Procedure

Remove the piston connecting rod assembly
• Remove the oil sump.

• Disconnect the oil pipe from the oil pump and remove Fig 1
the oil strainer.
• Remove the oil pump.

• Tilt the engine block.
• Clean and check for ridge formation of all cylinders.
• Turn the crank shaft (4) till the piston (1) comes at
B.D.C.
• Remove the bolts/nuts (9) of the connecting rod (2).
• Tap the connecting rod’s (2) cap with a mallet and
remove the cap (6) along with the bearing shell (10)
from the connecting rod.
• Turn the crank shaft (4) till the piston (1) comes at
T.D.C. Tap the connecting rod (2) with a wooden
block (3). Fig 2
• Note down the connecting rod cap matching number
stamped on it to avoid mismatching while reassembling.

• Place the upper and lower bearing shell in their respective
positions in the connecting rod and cap (6). Fit the cap on
the connecting rod. (Fig 1)
• Repeat the relevant steps to remove all the pistons. (Fig 2)
• Clean the connecting rod and pistons

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CITS : Automotive - Mechanic Diesel - Exercise 2.16