Man V12-1800, Installation Instructions Manual

Page: 33 / 92

Aligning an engine with flange−mounted gearbox
31
Checking gearbox output and propeller shaft
for radial and angle offset
Radial offset means that the centre lines of
2 associated flanges are actually parallel, but are
offset laterally in relation to each other.
À Flange (e.g. gearbox output)
Á Flange (e.g. propeller shaft)
Radial offset: X = max. 0.5 mm
Testing for radial offset: The dial indicator is
installed in one of the shaft ends. Connect both
flanges but not fully. To do this, screw in one bolt.
The face sides of the flanges must not touch.
The check is repeated four times with an angular
spacing of 90° between each check.
The display must not deviate by more than
2 x 0.5 mm = 1 mm.
Angle offset means that the centre lines of 2
associated flanges are not parallel.
À Flange (e.g. gearbox output)
Á Flange (e.g. propeller shaft)
 Angle offset
Angle offset: max. 0.1 mm
with reference to 200 mm flange diameter
Checking the angle offset: The dial gauge is
attached to one of the shaft ends. Connect the two
flanges by turning as far as they will go without
forcing them. To do this tighten a screw. However,
the faces of the flanges may not come into
contact.
The check is repeated four times with an angular
spacing of 90° between each check.
The maximum permissible angle offset may not be
exceeded at any measuring point.
Caution:
The alignment of the drive line must be
checked after the ship has been launched.
If readjustment is necessary, make sure
that all the mounts have a uniform bearing
function.
x
1
2
x
x+max.0.1mm
1 2
3