Hino J05C J05C TD Engine Valve Adjustment Procedure, Valve Lash Clearance Specifications, Parts,

Hino J05C J05C-TD Engine Valve Adjustment Procedure, Valve Lash Clearance Specifications, Engine Parts, Page 1 of 3

HINO J05C J05CTD VALVE CLEARANCE CHECKING AND ADJUSTING PROCEDURES

1.

2.

FORWARD DIRECTION

SM3-J811

Fig. 6

3.

Before checking, make sure that the tightening bolts of the cylinder head, rocker support, nozzle clamp, cam housing and cam bearing cap are tightened to the specified torque.

Make sure that there are no foreign particles or dust between the cross head and the valve stem.

Turn the crankshaft in the forward direction to align the_No. 1 piston to the top dead center of the com­ pression stroke.

Fig. 7

NOTE:O Make sure that the roller is on the base cir­ cle of the camshaft.

EXAMPLE

BASE CIRCLE OFTHE CAMSHAFT Fig.8

0 In order to avoid that the cross head runs on the valve stem or that it comes off from the valve stem, tum the cross head to the right and left to ensure that the cross head correctly covers the valve stem by listening for the clicking sound.

��&)

®@ GOOD

NO GOOD

SM3-J812

4.

Insert the feeler gauge between the rocker arm and the cross head and check that the valve clearance is within the standard range.

Hino J05C J05CTD Intake Valve clearance (cold) 0.30mm ( 0.0118 in. ) Hino J05C J05CTD Exhaust Valve c learanc e (c old) 0.45mm (0.0177 in.)

SM3-J809 Fig.10

WARNING If it out of the standard range, adjust the valve clearance using the following.

Hino J05C J05C-TD Engine Valve Adjustment Procedure, Valve Lash Clearance Specifications, Engine Parts, Page 2 of 3 z

5.

0

w I 0 <(

Loosen the adjusting screw nut of the cross head completely.

NOTE:O The adjusting screw must protrude 10 mm(0.3937 in.) or more from the cross head upper face.

0 Unless the adjusting screw is completely loose to the valve stem, the following ad­ justments may be adversely affected.

Fig.11

6.

Insert a feeler gauge between the rocker arm and cross head. Adjust clearance with the adjusting screw of the rocker arm. Tighten the tock nut with the fol­ lowing torque.

Tightening torque :

SM3-J813

250 kg•cm (18 lb·ft)

NOTE: The feeling of the feeler gauge during clear­ ance adjustment is the same as before.

Fig.12

7.

With the feeler gauge inserted, loosen the adjusting screw of the cross head. Make sure that the feeler gauge does not feel loose.

NOTE: If it is loose, repeat these steps from 5.

8. Tighten the adjusting screw of the cross head until the feeler gauge does not move.

9.

Fig.13

FEELER GAUGE ADHESION START NO MOVEMENT PROPER CONTACT

-,--I

- NUT FIXING / POSITION

FEELING IS SAME LOOSENING AMOUNT => LARGE OF ADJUSTING SCREW SM3-J007 Fig.14

While loosening the adjusting screw of the cross head gradually, adjust the valve clearance. Tighten the lock nut of the cross head when the teeter gauge feels correct.

NOTE:O The feeling of the feeler gauge during clear­ ance adjustment is same as before.

0 Do not overloosen the adjusting screw.

Overloosening of the adjusting screw will cause the same condition as in 5 again. The feeler gauge may feel correct, but there may be excessive clearance between the adjust­ ing screw of the cross head and the valve.

This does not allow for correct adjustment.

Tightening torque :

fig, 115

250 kg·cm (18 lb-ft)

Hino J05C J0SC-TD Engine Valve Adjustment Procedure, Valve Lash Clearance Specifications, Engine Parts, Page 3 of 3 0 The adjustable valve clearances when either the No.1 or No.4 piston is at the top dead center of the com­ pression stroke are shown in the following chart. After completing the valve clearance adjustment when the No.1 piston is at the top dead center of the compres­ sion stroke, tum the crankshaft one complete revolu­ tion and make the No.4 piston be at the top dead center of the compression stroke (The arrow printed on the camshaft points down and the underline is horizontal) and adjust the rest of the valve clearances.

• : Adjustable valve clearance 2 3 4 1

Cylinder

@

Valve

IN

Arrow points up .....

With No.1 piston at ro and underline is T.D.C. on compression Q) Ol horizontal. stroke ..,_ C ro o ..c ·Ammpoints With No.4 piston at fl) � -o T.D.C. on compression E C � down and under(tl (.) 8 line is horizontal. stroke

-

ROCKER ARM

CROSS HEAD

EX

IN

•••

EX

IN EX IN

••

•

EX

••

10. Finally, tighten all the lock nuts of the rocker arm and the cross head with the following torques and make sure that they are all tight (the nuts do not turn).

NOTE: Never overtighten with more than the follow­ ing torque.

Final confirmed torque :

280 kg·cm (20 lb-ft)

Fig.16

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