Wartsila RT-flex50-D User Manual

Maintenance4103−3/A1 RT-flex50-D
Wärtsilä Switzerland 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.
For dismantling as well as for assembling a new gear wheel, dismount the inter-
mediate wheel of the supply unit.
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 assembly of 2-part gear wheel
The undersize of center hole ‘d’ (Fig. ’A’) on 2-part ge
ar
wheel 1 with regard to the corresponding centring diam
-
eter of the crankshaft has to be checked and recorde
d
beforehand. For measuring, the crankshaft, the ge
ar
wheel, and the measuring instrument must have th
e
same temperature.
The undersize of the center hole with respect to the ce
n-
tring diameter must be 0.05−0.12 mm.
D If the undersize is not within the mentioned tole
r-
ance, the gear wheel must not be assembled, b
ut
the center hole of the gear wheel has to be given a
n
appropriate aftertreatment (remachine / possib
ly
bore and flame-spray, and machine to obtain th
e
correct diameter).
D Check whether there is a mark on the cranksha
ft
flange 2 for fitting the gear wheel. For the assemb
ly,
the gear wheel partition must coincide with th
is
mark.
The designation DRIVING END, which is located o
n
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
Replacing the Gear Wheel on the Crankshaft
2010

Wartsila RT-flex50-D Specifications

General

Brand	Wartsila
Model	RT-flex50-D
Category	Engine
Language	English