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Просмотр инструкции снегоходы Ski Doo SUMMIT 2005, страница 1100
Section 04 ENGINE (4-TEC)
Subsection 06 (CRANKSHAFT/DRIVE GEARS)
TIMING CHAIN
Theengineisequippedwithtwotimingchains
no. 28 and no. 29. One of the timing chains is
located on the engine alternator side behind the
ignition cover. The second is located on the PTO
side behind the PTO cover.
Removal of Alternator Side
Timing Chain
Remove:
– ignition cover (refer to COOLING SYSTEM)
– chain tensioner and chain guide (refer to CYLIN-
DER AND CYLINDER HEAD)
– camshaft sprocket (refer to CYLINDER AND
CYLINDER HEAD)
– oil pump gears no. 24 (refer to LUBRICATION
SYSTEM)
– crankshaft drive gear no. 7 (refer to DRIVE
GEARS).
Carefully pull the timing chain sideward and down
from the crankcase.
Removal of PTO Side Timing Chain
Remove:
– engine from vehicle (refer to REMOVAL AND
INSTALLATION)
– oil tank (refer to LUBRICATION SYSTEM)
– chain tensioner and chain guide (refer to CYLIN-
DER AND CYLINDER HEAD)
– camshaft timing gear (refer to CYLINDER AND
CYLINDER HEAD)
– PTO cover (refer to CRANKCASE)
– trigger wheel no. 6 (refer to TRIGGER WHEEL).
Carefully pull the timing chain sideward and down
from the crankcase.
Inspection
Inspection is the same for both timing chains
no. 28 and no. 29. Pay attention to the following
details.
NOTE: Check timing chain on camshaft sprock-
et/timing gear for excessive radial play.
Check chain condition for wear and rollers condi-
tion.
1
R610motr201A
1. Timing chain
If chain is excessively worn or damaged, replace it
as a set (camshaft sprocket/timing gear and timing
chain).
Installation
Installation is the same for both timing chains
no. 28 and no. 29.
The installation is essentially the reverse of the re-
moval procedure but, pay attention to the follow-
ing details.
NOTE: Ensure to perform proper valve timing.
Lock crankshaft and camshaft at TDC (refer to
CYLINDER AND CYLINDER HEAD).
Install chain then, adjust chain tension (refer to
CYLINDER AND CYLINDER HEAD).
CAUTION: Improper valve timing will damage
engine components.
DRIVE GEARS
The drive gears are located on the engine alterna-
tor side behind the ignition cover.
234 mmr2005-026
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