Working On The Left Seclion Of The Engine Case - KTM 450 SX-F EU Repair Manual

3MNGINE - WORK ON THE INDIVIDUAL PARTS
132
- Position all bearing retainers.
- Mount and tighten screws
Guideline
Locking screw for bearing M5 6 Nm
Lactile- 243™
(4.4 Ibf ft)
- Blowout the oil channel with compressed air and check that it is clear.
Worklnl on Ittl 11ft slctlon
of
Ittl Inllnl Casl
- Remove all dowels.
- Remove shaft seal ring of the crankshaft, shift shaft and countershaft
- Remove bearing bolt
- Remove oil jet in the oil channel.
- Remove oil jet for piston cooling.
- Remove screws . Remove the bearing retainers.
- Remove oil suction pipe
- Remove the rest of the sealing compound and thoroughly clean the section of the
engine case.
- Warm the section of the engine case in an oven.
Guideline
1150 °C (302
OF)
- Place the section of the engine case on a flat sheet of wood and knock on the case;
the bearings will then fall out of the bearing seats.
_ Info
I
Any bearings still remaining in the section of the engine case must be
removed with a suitable tool.
- Insert the new cold bearings in the bearing seats of the heated section of the
engine case; if necessary, use a suitable press drift to push them all the way in and
make them flush.
_ Info
I
To prevent damage, ensure that the section of the engine case lies flat when
pressing it in.
Only press in the bearings by way of the outer bearing race, as otherwise the
bearings will be damaged when they are pressed in.
- Insert bearing bolt
- After the section of the engine case has cooled down, check to ensure that the
bearings are firmly seated.
• Info
I
If the bearings are not firmly seated once cooled down, it can be assumed
that the bearing races will turn in the engine case
at
higher temperatures. In
this case, the engine case needs to be replaced.
- Mount the dowels.
- Press in shaft seal ring of the crankshaft so it is flush with the open side facing
out.
- Press in shaft seal ring of the shift shaft so it is flush with the open side facing
in.