pag. 34
Engine TRE 0701-TRE 0702-TRE 0801
Service manual
10. ENGINE BLOCK – External repairs
If necessary, remove the engine of the machine
according to indications in paragraph [ 11.1].
10.2. Adjusting the valve clearance
WARNING: The adjustment must be made
with the engine is cold.
1 - Dismount the cowl, lter and carburettor [
7.1].
2 - Remove the cover and demount the spark plug
[ 10.1].
3 - Remove lid (5) which is secured with four screws
(6) and remove the washer (7).
4 - Unscrew the screws (8) and remove the right
and left side panels (9).
5 - Manually set the piston to the TDC (Top Dead
Centre) of the compression stroke so that both
valves are closed.
6 - Use a 0.10 mm (inlet) or a 0,15 mm (exhaust)
feeler gauge (10) to check the gap between the
rocker arm and the tip of the valve stem; the gauge
should pass between without forcing and without
a further gap.
7 - The gap is adjusted by slackening off the nut (11)
and suitably adjusting the register nut (12) until the
above condition is reached.
8 - Following adjustment, check that the pushrods
(13) are properly inserted in the rocker arm housings
(14) and always fully tighten the nut (11).
9 - When reassembling check the condition
of the gasket (7) of the cover (5) and replace it if
it is damaged.
10 - Assemble the spark plug [ 10.1].
11 - Refit the cowl, the filter and the carburettor
and close the screws to the indicated couple [
7.1].
6
5
7
5
7
9
9
8
10
14
12
13
11
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