WinGD WARTSILA RT-flex58T-E, Руководство по обслуживанию, Страница: 290 / 504

Maintenance
4103 − 3/A1
RT-flex58T-E
Winterthur Gas & Diesel Ltd.
2/ 5
1. General
Usually, the gear wheel on the crankshaft (from now on referred to as gear wheel)
is executed in one part and fitted as such on the crankshaft. If a damaged gear
wheel in the engine is to be replaced, it must be separated into two halves for dis-
mantling. In order to avoid damages, especially to the crankshaft, please ob-
tain the necessary instructions and recommendations for executing such disman-
tling work from the engine supplier or from Wärtsilä Switzerland Ltd.
The spare gear wheel is executed in two parts and must be fitted as described be-
low.
Remark: When ordering a 2-part spare wheel, please indicate the engine type, the
engine No., as well as the engine supplier. This data is necessary because the
centring diameter of the crankshaft is registered for mounting the gear wheel, and
the center hole of the 2-part spare wheel is manufactured according to these di-
mensions.
2. Preparing the assembly of gear wheel
The undersize of center hole ‘d’ (Fig. A) on 2-part gear
wheel 1 with regard to the corresponding centring diam-
eter of the crankshaft has to be checked and recorded
beforehand. For measuring, the crankshaft, the gear
wheel, and the measuring instrument must have the
same temperature.
The undersize of the center hole with respect to the cen-
tring diameter must be 0.05 ... 0.13 mm.
D If the undersize is not within the mentioned toler-
ance, the gear wheel must not be assembled, but
the center hole of the gear wheel has to be given an
appropriate after-treatment (remachine / possibly
bore and flame-spray, and machine to obtain the
correct diameter).
D Check whether there is a mark on the crankshaft
flange 2 for fitting the gear wheel. For the assembly,
the gear wheel partition must coincide with this
mark.
The designation DRIVING END, which is located on
the front of the gear wheel, must be on the side of
the flywheel!
B
CHECK
2
001.171/97
1
DRIVING
END
DEGREASE
6
2013
Replacing the Gear Wheel on the Crankshaft