Left-Hand Semi-Crankcase, Inner Side - GAS GAS Enduro Series Workshop Manual

Workshop manual
SeRVICING aND RePaIRING THe eNGINe'S COmPONeNTS
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LEFT-HAND SEMI-CRANKCASE, INNER SIDE

- Before performing any repairs to the left-hand semi-crankcase, check inside for
any deformation around its circumference with a thickness gauge.
Maximum semi-crankcase deformation
Note:
Toremovethebearingsfromtheleft-handsemi-crankcase,itisnecessaryto
heatittoapproximately150°Cusingaheatingplate,stoveorsimilar.Onceit
ishot,simplyuseanordinaryextractortoolorasoftmetalorwoodenpusher
tocompletelyremovethebearings.Inexceptionalcases,itmaybenecessary
to use a press to dislodge the bearings.
- Remove the seals from the left-hand semi-crankcase using a seal extractor or
by carefully prying with a screwdriver.
Note:
 A llgaskets,sealsandO-ringsmustbereplacedeverytimetheengineis
partiallyorcompletelydismantled.
- Place the left-hand semi-crankcase on a heating plate and heat it to
approximately 150°C.
Danger:
 W henhandlingthesemi-crankcaseafterheatingit,heat-resistantgloves
should be worn to protect the hands.
- Dislodge the bearings from the left-hand semi-crankcase.
Crankshaft bearing -1-
- Remove the roller bearing from the crankshaft using a bearing extractor
(maximum diameter 38 mm) from the inside of the semi-crankcase inwards.
- Place the new roller bearing in the semi-crankcase housing. The stamped side
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of the bearing must be orientated towards the inside of the semi-crankcase.
- Press on the new roller bearing until it is flush with the inside surface of the
semi-crankcase.
Primary shaft bearing -2-
- Remove the ball bearing from the primary shaft by pressing from the outside of
the semi-crankcase inwards.
-40-
0.05 mm