633GC OPERATOR’S MANUAL
20
MAINTENANCE
Drive Sprocket Installation
•
Assemble the rim sprocket onto the splined adapter, either direction.
•
Slide thin metal washer onto drive shaft, slide new needle bearing onto
shaft and slide new clutch cup assembly onto bearing (Figure 10).
•
Apply a liberal amount of waterproof grease to the needle bearing by
simply injecting it directly into the end of the drive shaft. Rotate the
clutch cup while grease is being injected to ensure that the entire
bearing is coated.
•
Install the clutch by rotating it counter clockwise onto the drive shaft and
firmly tighten. Torquing the clutch is not necessary, as starting the saw
will automatically tighten the clutch. Replace clutch slurry shield.
Installation of drive sprocket assembly is now complete.
SPARK PLUG
•
A worn or fouled spark plug can result in loss of power, difficult to start
or rough idle (Figure 11).
•
If the spark plug is dirty, clean with a wire brush and check the electrode
gap. Readjust if necessary. The correct gap is 0.50mm (.020”).
•
The spark plug should be replaced after 40 hours of operation or earlier
if the electrodes are badly eroded.
•
Always use the recommended spark plug type. An incorrect spark plug
can severely damage the piston and cylinder.
Figure 11
Figure 10
Summary of Contents for 633GC
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