Stiga WBE170 - Dismantling and Checking the Piston, Piston Rings, Connecting Rod and Engine Shaft

Release 00 - 11/2018
Engine WBE 170
page 47
Workshop Manual
16.3. Dismantling and checking the piston, piston
rings, connecting rod and engine shaft
NOTE - These paragraphs describe all the
operations for checking and overhauling the
thermalcomponentsoftheengine;itisleft
to the operator to assess the advisability of
performing all the operations described or
only part of them, depending on the type of
engine problems encountered.
1 - Remove the ywheel [
15.3].
2 - Open the cover [ 16.1].
3 - Remove the camshaft [ 16.2].
4- Dismantle the connecting rod (18) cap (19), xed
with two screws (20) (take note of any reference
marks for retting).
5 - Push the connecting rod (19) so as to ensure the
piston (21) enters the cylinder (22) fully.
6 - Pull the engine shaft (23) out completely.
7 - To remove the piston (21) pull the connecting
rod (19) as shown in the gure.
8 -
Use the special expanding tool (24) to re-
move the two compression rings and the oil scraper
ring from the piston (21).
9 - Carefully remove all carbon deposits from the
compression rings, the inside of the cylinder and
the piston head.
16. ENGINE BLOCK - Overhauling internal parts
20
20
19
23
18
24
21
22
19
19
21
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