Page 84 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

EXERCISE 3.3: Overhauling the turbo charger

Objectives

At the end of this exercise you shall be able to
• remove turbo charger from vehicle
• dismantle turbo charger
• clean, replace or repair defective parts
• assemble and check turbo charger
• refit turbo charger on vehicle and start the engine.

Requirements

Tools/Instruments Materials/Components

• Trainee’s tool kit - 1 No • Kerosene - as reqd.
• Circlip plier - 1 No • Cotton cloth - as reqd.
• Box spanner - 1 set • Anti corrosive solution - as reqd.
• Dial gauge - 1 No • Cleaning brush - 1 No.
• Torque wrench - 1 No • Turbo charger accessories - as reqd.
• Plastic mallet - 1 No
Equipments/Machines
• Work bench - 1 No.
• Turbo charger - 1 No.

Procedure

Removal
Fig 1
• Park the vehicle on level surface and choke the
wheels.
• Make sure the engine is cool-down. Open the hood
and remove the battery cables.
• Remove the compressor side hose clamp of hose
pipe.
• Disconnect the oil connections/pipes from turbo
charger and vacuum connections of actuator.
• Remove the mounting bolts of turbine side.
• Remove the turbo charger from vehicle and place it
on working table (Fig 1).

Fig 2 • Check visually for cracked, bent or damaged
compressor wheel blades.
• Check bearing clearances-secure the turbine
hosing and check the thrust clearance using a dial
gauge. Ensure clearance is within MIN/MAX values.
If axial clearance does not meet specification than
overhaul to strip and rebuild the turbocharger.
(Fig 2)

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