Page 19 - Mechanic Diesel - TP - Malayalam

Professional Overhaul & 43 Perform Overhauling of cylinder Diesel Engine Components
Skill; 160 Hrs; service Diesel head assembly, Use of service - Description and Constructional
Professional Engi ne, its manual for feature of Cylinder head, Importance
parts and check
Knowledge; functionality. 44 clearance and other parameters. of Cylinder head design,
25 Hrs (10hrs) - Type of Diesel combustion
45 Perform practice on removing chambers,
rocker arm assembly manifolds. - Effect on size of Intake & exhaust
(05hrs)
passages, Head gaskets.
46 Perform practice on removing - Importance of Turbulence. Valves
the valves and its parts from the & Valve Actuating Mechanism -
cylinder head, cleaning. (05hrs)
- Description and Function of Engine
47 Inspection of cylinder head and Valves, different types, materials,
manifold surfaces for warping,
cracks and flatness. Checking valve - Type of valve operating mechanism,
seats & valve guide-Replacing the Importance of Valve seats, Valve
valve if necessary. (05hrs) seats inserts in cylinder heads,

48 Check leaks of valve seats for - Importance of Valve rotation, Valve
leakage - Dismantle rocker shaft stem oil seals, size of Intake valves,
assembly-clean & check rocker Valve trains, Valve- timing diagram,
shaft - and levers, for wear and concept of Variable valve timing.
cracks and reassemble.(05hrs) - Description of Camshafts & drives ,
49 Check valve springs, tappets, - Description of Overhead camshaft
pushrods, tappet screws and valves (SOHC and DOHC), importance of
tem cap. Reassembling valve parts Cam lobes, Timing belts & chains,
insequence, refit cylinder head and Timing belts & tensioners. (07hrs)
manifold & rocker arm assembly,
adjustable valve clearances,
starting engine after adjustments.
(10 hrs)

50 Perform Overhauling piston and - Description&functionsof different
connecting rod assembly. Use of types of pistons, piston rings and
service manual for clearance and piston pins and materials.
other parameters. (05 hrs)
- Used recommended clearances
51 Perform Practice on removing oil for the rings and its necessity
sump and oil pump - clean the sump. precautions while fitting rings,
(04 hrs) common troubles and remedy.
52 Perform removing the big end - Compression ratio.
bearing, connecting rod with the - Description & function of connecting
piston. (04 hrs)
rod,
53 Perform removing the piston rings; - importance of big- end split obliquely
Dismantle the piston and connecting
rod. Check the side clearance of - Materials used for connecting rods
piston rings in the piston groove & big end & main bearings. Shells
lands for wear. Check piston skirt piston pins and locking methods of
and crown for damage and scuffing, piston pins. (05 Hrs)
clean oil holes. (05 hrs)
54 Measure -the piston ring close gap
in the cylinder, clearance between
the piston and the liner, clearance
between crank pin and the connecting
rod big end bearing. (03 hrs)

55 Check connecting rod for bend
and twist. Assemble the piston and
connecting rod assembly. (04 hrs)

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