Maintenance And Repair Instructions - Craftsman 316.791930 Manual Del Operador

OPERATING INSTRUCTIONS
NOTE: Aligning the release
button with the guide
recess will help
installation (Fig. 9).
3. Turn the knob clockwise
to tighten (Fig. 11).
For decorative edging with the
line head trimmer attachment
or other attachment, lock the
release button of the
attachment into the 90° hole
(Fig. 11).
HOLDING THE TRIMMER
WARNING:
Always wear eye, hearing, foot and body
protection to reduce the risk of injury when operating this unit.
Before operating the unit, stand in the
operating position (Fig. 12). Check for
the following:
• The operator is wearing eye
protection and proper clothing
• With a slightly-bent right arm, the
operator's hand is holding the shaft grip
• The operator's left arm is slightly
bent, the left hand holding the D-
handle
• The unit is at waist level
• The trimmer attachment is parallel to
the ground and easily contacts the
grass without the need to bend over
TIPS FOR BEST TRIMMING RESULTS
• Keep the trimmer attachment parallel
to the ground.
• Cut from left to right whenever possible. Trimming to the right improves
the unit's trimmer efficiency. Clippings are thrown away from the
operator.
• Trim only when grass and weeds are dry.
• The life of your trimmer line is dependent upon:
- Following the trimming tips
- What vegetation is being cut
- Where vegetation is being cut
DECORATIVE TRIMMING
Decorative trimming is accomplished by
removing all vegetation around trees,
posts, fences and more. Rotate the
whole unit so that the trimmer
attachment is at a 30° angle to the ground (Fig. 13).
MAINTENANCE & REPAIR INSTRUCTIONS
MAINTENANCE SCHEDULE
WARNING:
To prevent serious injury, never perform
maintenance or repairs with unit running. Always service
and repair a cool unit.
Perform these required maintenance procedures at the frequency
stated in the table. These procedures should also be a part of any
seasonal tune-up.
NOTE: Some maintenance procedures may require special tools or
skills. If you are unsure about these procedures take your unit to
Sears or other qualified service dealer. Call 1-800-235-5878 for
more information.
NOTE: Maintenance, replacement, or repair of the emission
control devices and system may be performed by a Sears
or other qualified service dealer. Call 1-800-235-5878 for
more information.
90˚ Edging Hole
(Trimmer Only)
Knob
Fig. 11
Fig. 12
Fig. 13
MAINTENANCE & REPAIR INSTRUCTIONS
FREQUENCY MAINTENANCE REQUIRED
Before starting Fill fuel tank with fresh fuel
engine
Check oil
Every 10 hours Clean air filter
Every 25 hours Change oil
Clean spark arrestor
Every 25 hours Check rocker arm to valve clearance
and adjust
Check spark plug condition and gap
HASSLE-FREE™ PLUS LINE REPLACEMENT
Always use Craftsman Hassle-Free™ XTRA QUIET Spiral Line.
Choose the line size best suited for the job at hand. Red colored line
is designed for cutting grass and small weeds. Black colored line is
designed for cutting larger weeds and light brush.
NOTE: Before inserting new
line into the holes in
the cutting head,
identify the proper
holes. Follow
directions as shown
on the glide plate. Do
Not attempt to
remove the cutting
head from the unit
when replacing line.
NOTE: Do not mix lines. Use
2 black or 2 red only.
1. Remove the old line and
line glide plate from the
cutting head.
2. Clean entire surface of
cutting head.
3. Reinstall line glide plate
(Fig. 14). The glide plate is
a keyed item and will only
fit one way. If it does not
go into the cutting head
smoothly, DO NOT force it.
Rotate the glide plate until
it slides into the cutting
head easily.
NOTE: The glide plate must
be installed in the
cutting head before
inserting new line.
4. Insert both ends of your line through the large holes in the side
of the cutting head (Fig. 15).
5. Push and/or pull the line so that the line is snug against the hub and
is fully extended through the positioning tunnels. (Fig. 16)
6. Correctly installed line will be the same length on both sides.
NOTE: Make sure that when installing new line, that the line is as close
to even as possible. Any variation in lengths may cause the unit
to vibrate excessively. If this happens, stop the unit and make
sure the line is even.
7. Repeat steps 4 thru 6 to install the second trimmer line.
NOTE: Do not rest the Hassle-Free™ PLUS Cutting Head on the
ground while the unit is running.
Some line breakage will occur from:
• Entanglement with foreign matter
• Normal line fatigue
• Attempting to cut thick, stalky weeds
• Forcing the line into objects such as walls or fence posts
NOTE: During normal use the trimming line may become worn unevenly
which may cause excessive vibrations in the unit. If this becomes
uncomfortable or uncontrollable, stop the unit and replace the
line. Refer to the Line Replacement instructions above.
7
Glide Plate
Cutting Head
Fig. 14
Large Holes
Fig. 15
Positioning Tunnel
Fig. 16
SEE
p. 5
p. 8
p. 8
p. 8
p. 10
p. 9
p. 10