Volvo D12 Especificaciones descargar pdf (Pagina 40)

Volvo Trucks North America, Inc. Date Group No. Page

TSI 9.2003 211 007 40(41)

2149-05-05-01

Valve Seat, Grind (One)

You must read and understand the precautions and

guidelines in Service Information, group 21, "General

Safety Practices" before performing this procedure.

If you are not properly trained and certified in this

procedure, ask your supervisor for training before

you perform it.

Prior to grinding, check the valve guides and replace

them if the wear limits have been exceeded.

Grind the valve seat just enough to give it its correct shape

and to ensure a good contact surface for the valve rotator.

T2007045

Fig. 43: Valve seat angles, Intake Valve

T2007046

Fig. 44: Valve seat angles, Exhaust Valve

Dimension B shows the amount of wear or grinding

allowed on the valve seat. The distances are measured

with a new valve and the wear tolerances are:

a Intake valve— 1.5 mm (0.06 in)

b Exhaust valve — 1.8 mm (0.07 in)

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Volvo D12 Especificaciones Pagina 40