57TS 500i
: Coat the needle cage (1) with oil
: Push the needle cage (1) into the
rod eye
– Examine and install the piston,
b 6.8
– Examine and install the cylinder,
b 6.6
– Install the clutch drum, b 5.3
– Install the engine, b 6.5
– Reassemble remaining parts in
reverse order
6.7.1 Ball bearing / crankcase
The two halves of the crankcase
can be replaced individually if they
are defective.
New crankcases are delivered with
the relevant components pre-
assembled – see spare parts list.
Those parts which are not supplied
with the new crankcase must be
removed from the old crankcase
halves, examined and replaced if
necessary.
When fitting a new crankcase, the
machine's serial number must be
stamped on the crankcase with
2.5 mm figure stamps.
1307RA139 TG
1
If the old crankcase is reused, the
oil seals and ball bearings must be
replaced, all gasket residues
removed and the mating surfaces
cleaned thoroughly. The mating
surfaces must be absolutely clean
to guarantee a perfect seal.
Examine both halves of the
crankcase for cracks and check all
mating surfaces for signs of
damage.
– Refer also to troubleshooting
chart, b 3.5
– Remove crankshaft, b 6.7
Fan-side half of the housing
: Carefully drive the oil seal out
with a suitable punch
– Examine and clean the
crankcase half, replace if
necessary
Replace the ball bearings if the
crankcase half is in good condition.
1307RA143 TG
– Heat the area around the bearing
seat to approx. 150 °C (300 °F)
The bearing (1) drops out of its own
accord when this temperature is
reached.
– Heat the area around the bearing
seat to approx. 150 °C (300 °F)
: Press the ball bearing home as
far as possible
The ball bearing must be fitted
rapidly, as it absorbs heat and
expands.
1307RA144 TG
1
1307RA145 TG
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