Page 87 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

15 Install the lock leaf on the cam shaft gear and tighten the nut and lock the nut with the help of the lock leaf.

16 Install a new gasket on the timing cover and fit the timing cover to the front plate of the engine block, tightening
all bolts.
17 Fit the frank pulley to the frank shaft.

18 Install the lock leaf on the dog nut and tighten the dog nut.
19 Lock the dog nut with the lock leaf.
Safety precautions
1 Dirty hands should be kept clean while working on the job.

2 Piston No. 1 at T.D.C. But check after setting. Pointer (arrow) given in fly wheel housing and TDC given on fly
wheel. The marks should be face to face. Correct if the marks are not face to face.
3 While setting the valve timing, both taps of cylinder no. 1 should be on the overlap period and piston 1 should
be at T.D.C. must be on.
4 With the help of the fly wheel, rotate the crank shaft two revolutions. The marks of both the gears should be
opposite to each other. If Mark face to face If not, reset the valve timing.

5 After setting the valve timing, the cam shaft gear nut should be locked with the help of lock leaf.
6 Before fitting the valve timing chain, its wear and slackness should be checked. If there is excessive wear and
looseness, the chain should be replaced.

Four-stroke compression-ignition engines-ii (Perkins)

Timing arrangements and overhead-valve operating gear shown in relation to
diesel engine.

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CITS : Automotive - Mechanic Diesel - Lesson 19 - 24