Release 00 - 11/2018
page 44
Engine WBE 170
Workshop Manual
16. ENGINE BLOCK - Overhauling internal parts
2
1
3
All the following operations on the grass cutter ne-
cessitate the removal of the motor.
16.1. Carter opening
1 - Loosen the lever xing nut (1), release the spring
(2) and remove the control lever (3).
2 - Position the engine on a stable support and
remove the sparkplug.
Bring the piston to the TDC (Top Dead Centre).
3 - Turn the engine upside down and place it with
the shaft pointing upwards.
4 - Unscrew the nine screws (4), recovering the two
centring pins (5) and remove the engine sump with
the help of levers.
5 - Check the timing between the engine shaft and
camshaft, partially removing the shim ring;
If necessary, re-set the phasing, referring to the
indications provided.
6 - On assembly, follow the steps described in re-
verse and:
- clean the contact surfaces, removing any remai-
ning silicone;
- evenly distribute the silicone seal (THREE BOND
1207) (6) as shown in the gure;
- ensure that the two centring pins (5) are properly
inserted;
- always replace the compression ring from the
sump side [
15.6].
- close the screws (4) intersection lock sump to the
indicated couple;
7 - After installing the engine on the machine:
- rell the sump and make sure that the ller plug
is tight.
- check correct the brake control cable adjustment
[ 13.1].
8 - Following reassembly, it is advisable to check
the engine’s rpm [ 10.1].
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5
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