Craftsman 247.77638 Operator's Manual page 16

Service Muffler
Warning
Temperature of muffler and nearby areas may exceed 150˚ F (65˚C).
Avoid these areas.
• Inspect muffler every 50 hours, and replace if necessary.
Replacement parts for the muffler must be the same and installed
in the same position as the original parts.
clean Engine
• Daily or before every use, clean grass, chaff or accumulated
debris from engine. Keep linkage, spring, and controls clean.
Keep area around and behind muffler free of any combustible
debris.
• Keeping engine clean allows air movement around engine.
• Engine parts should be kept clean to reduce the risk of overheat-
ing and ignition of accumulated debris.
caUTiOn
Do not use water to clean engine parts. Water could contaminate fuel
system. Use a brush or dry cloth.
carburetor adjustment
The carburetor on this engine is not adjustable.
Engine Speed
lUbricaTiOn
Warning
Do not attempt to alter the engine speed by tampering with the
engine's governor linkage. Doing so could result in serious personal
injury and damage to the engine. The engine RPM has been set at
the factory.
• Hopper Assembly
- Lubricate the pivot points on the hopper
assembly with light oil once a season.
• Discharge Chute
- Lubricate the pivot points on the discharge
chute with light oil once a season.
• Release Rod
- Lubricate the release rod and spring with light oil
once a season.
clEan EQUiPMEnT
• Clean the chipper shredder thoroughly after each use.
• Wash bag periodically with water. Allow to dry thoroughly in
shade.
• If the flail screen becomes clogged, remove and clean as
instructed below.
NOTE: Cleaning with a forceful spray of water is not recommended as
it could contaminate the fuel system.
SERVICE AND MAINTENANCE
rEMOVing THE Flail ScrEEn
Before performing any type of maintenance on the machine, wait for
all parts to stop moving and disconnect the spark plug wire. Failure
to follow this instruction could result in personal injury or property
damage.
If the discharge area becomes clogged, remove the flail screen and
clean area as follows:
1. Stop the engine. Make certain the chipper shredder has come to
a complete stop.
2. Disconnect spark plug wire from spark plug and ground against
the engine.
3. A. Remove the bag and two wing knobs on each side of the chute
deflector. See Figure 14.
C
B. Lift the chute deflector up to keep it out of the way.
C. Remove the two hairpin clips from each clevis pin which
extend through the housing and remove pins.
D. Remove the flail screen from inside the housing and clean the
screen by scraping or washing with water. See Figure 14.
4. Reinstall the screen, making certain to reassemble the flail screen
with the curve side down.
5. Reattach the chute deflector with the hardware previously removed
and connect the bag to unit.
SHarPEning Or rEPlacing cHiPPEr
blaDES
1. Disconnect the spark plug wire and ground against the engine.
2. Remove the flail screen as instructed in the previous section.
3. Remove the chipper chute by removing three hex nuts and
washers.
4. Remove the chipper chute support brace from the frame by
removing the hex bolts.
16
Warning
B
A
D
Figure 14