Crankcase Halves

Disassembling and assembling crankcase halves










Component view, designations and notes

Assembly instructions
Separating crankcase halves

Note: Loctite 5900" sealant is used to seal the crankcase halves. This makes it somewhat more difficult to separate the crankcase halves. The sealant can be recognized by its "black" color.

1. Undo ring-edge bolt.





2. Undo the third fastening point on the crankcase half cylinder 4 - 6 of the engine support, special tool 9589.
3. Use a slotted screwdriver with a tip which is 14 mm wide and 250 mm long to separate the crankcase halves.











4. Insert the screwdriver in the lugs of the crankcase halves and separate the crankcase halves by tapping gently. Alternate the sides during separation.

Assembly instructions
Sealing of crankcase halves
Only "Drei Bond silicone type 1209" and Loctite 5900" should be used for surface sealing. After application of surface seals (silicone bead), screw together within five minutes.

Application of silicone bead





A = Surface seal Loctite 5900
B = Metering pistol





1. At the processing nozzle, cut off the first metering step at an angle.





2. Apply a uniform bead approximately 1.5 mm wide to the cleaned sealing surface of the crankcase half (cylinders 4 - 6).
3. Carefully set the crankcase half in place so that the sealing bead is not damaged.
4. Fasten crankcase. Always use micro-encapsulated hexagon-head bolts. Tightening torque 13 Nm (7.5 ft. lbs.). Observe tightening sequence.

Assembly instructions
Tightening sequence for crankcase halves





Tightening torque for micro-encapsulated hexagon-head bolts 13 Nm (10.0 ft. lbs.)