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633GC OPERATOR’S MANUAL
24
© 2007 ICS, Blount Inc. P/N 70944 Jan 07
After Every Use ….
1. Rinse saw, bar & chain
with water.
2. Check for loose fasteners.
Tighten as necessary.
3. Inspect, flush and grease
the chain tensioner.
4. Inspect drive sprocket for
wear. Replace sprocket
if groove cuts through the
top of the tooth.
5. Check drive sprocket
bearing for wear by
spinning clutch cup.
Replace if worn out.
6. Grease drive sprocket
bearing. Inject grease into
the end of the drive shaft.
Spin clutch cup while
greasing.
7. Check the starter cord for
wear or damage. Replace
as necessary.
8. Lube starter recoil spring.
Spray lightweight oil into
lube hole. Also, spray
lightweight oil into the air
intake slots on the starter
housing to keep starter
pawls from sticking.
9. Inspect air filter and spit-
back screen. Replace filter
if dirty.
10. Spit-back screen should be
white with no oil build-up.
Rinse in gas or solvent to
clean.
11. Spray saw, bar and chain
with lightweight oil.
After 10 hours ….
1. Remove the starter cover
and lubricate the starter
recoil spring. Clean the
fins and the starter pawls
on the flywheel with a wire
brush, then grease starter
pawls.
2. Remove & clean the spark
plug. Check the electrode
gap. The correct gap is
.020 inch (0.5mm).
3. Inspect air filter, replace if
nessesary.
4. Clean the spit-back screen
(inside the air filter) with
gas or solvent.
After 40 hours ….
1. Change spark plug. Adjust
electrode gap to .020 inch
(0.5mm).
2. Check fuel filter located
inside the fuel tank. Clean
or replace if clogged.
MAINTENANCE