Jonsered CS2186 Workshop Manual page 45

Assembly
Assembly of the piston and cylinder is carried out as follows:
NOTE!
Exercise care so that dirt and foreign
particles do not get into the crankcase.
1. Lubricate the needle bearing and fit it in the connecting
rod's little-end.
2. Replace the piston with the arrow facing the exhaust port.
See fig. 8. Slide in the gudgeon pin and fit the circlip.
3. Fit the intake manifold on the cylinder. The clamp bolt
should be upwards. See fig. 9.
4. Fit the decompression valve (D). See fig. 11.
Tighten it to 15 Nm.
5. Fit the gasket on the cylinder base. Press it up so that
it fastens on the sleeve of the cylinder.
6. Oil in the piston ring and sides of the piston.
7. Compress the piston ring, either by hand or with tool
502 50 70-01. See fig. 10. Carefully fit on the cylinder.
8. Guide up the cylinder base gasket with the four bolts
(C) and tighten them alternately. Tighten them finally
to 10 Nm. See fig. 11.
9. Fit the anti-vibration spring (B) on the cylinder.
See fig. 11. Tighten the bolt to 10 Nm.
10.Insert the spark plug and pressure test as shown in
the instructions on the next page.
11.Assemble the following parts:
• Muffler. See page 17.
• Carburettor. See page 34.
• Cylinder cover. See the Operator Guide.
12.If a new piston and/or cylinder is fitted the chainsaw
should be run-in for 3-4 hours with the carburettor
set at its basic settings (H=1/4 and L=1/4 turn).
See carburettor settings on pages 36 and 37.
PISTON and CYLINDER
Fig. 8
Fig. 9
Fig. 10
C
Fig. 11
D
B
A
English – 43