Workshopmanual Kreidler MP Page 3 - Disassembling Engine

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#1 Bericht door **Maarten** » 25 jan 2005, 21:10

Workshopmanual Kreidler MP mopeds
Page 3. Disassembling Engine: Removing Driving Sprocket, Cylinder, Ignition
This pages contain the workshopmanual of the MP automatic 2 speed moped engine,
as used on MP1, MP2, MP3 and the American MP9 and MP19 bikes.

CONTENTS:

Disassembling Engine

For the work now to be performed we recommend the use of an assembling
trestle (selfmade tool as per below drawing). It gives the engine a perfect
seat, and you can work with both hands.

The Assembling Trestle
Click the picture for a big pic!

Afbeelding

Sequence of Operation:Removing Driving Sprocket
First the driving sprocket is removed. The lock plate underneath the sprocket holding nut must be bent straight (Fig. 25); it will not be fitted again for reassembly!

Afbeelding

The sprocket wheel must be locked when the nut is to be loosened. This is achieved through various means such as a piece of flat iron material, approx. 16 x 6 x 40 mm in size, which is placed between one of the sprockets and the corner of the housing wall (Fig. 26). However, we recommend the use of the arresting chain (Pt. No. 09.30.42-02/109, Figs. 84 and 77).

Afbeelding

Disassembling Cylinder and PistonPlace engine on trestle as shown in Fig. 28.Pull plug connector and remove spark plug.Together with the cylinder head the cylinder is held by long draw in bolts. Head and cylinder can be removed after the four M 6 nuts (10 mm wrench size, slim socket wrench) have been removed. Do not reuse cylinder head gasket! Watch the four washers underneath the cylinder mounting nuts.

Afbeelding

Use snap ring pliers to lift out the two gudgeon pin lock rings after the crankcase has been carefully covered with clean rags (Fig. 29).

Afbeelding

Use a hardwood drift for forcing the gudgeon pin out of the cold piston.
lf excessive force has to be applied, please check the lock ring groove for burrs which may have built up there (Fig. 30).
(Removal of the piston may be done as the last operation. This, however, necessitates continuous support of the piston by the wooden fork, Pt. No. 09.30.30-02/346, during all operations performed prior).

Afbeelding

Removing lgnition SystemFor unscrewing the central mounting nut (M 8 x 1 fine thread, wrench size 13) the flywheel is held via the holding wrench, Pt. No. 09.30.43-02/110. Fit the magnet wheel puller (special tool, Pt. No. 08.12.98-04/21). Then the flywheel is pulled off its crankshaft seat by screwing in the pressure screw, wrench size 22, simultaneously counteracting via the holder (Fig. 31).

Afbeelding

Do not lose the Woodruff key which locates the flywheel on the crankshaft. If it sticks, apply pressure using a screwdriver for levering it out of its seat (Fig. 32).

Afbeelding

Now unscrew ignition base plate. You may mark its position prior to removal and after having checked firing point and adjusted if necessary. However, it is better to adjust following completion of the repair work (Fig. 34).

CONTENTS: