MTD Yard Machines Y780 Operator's Manual page 11

NOTE: Failure to wind the line in the direction indicated will
cause the cutting attachment to operate incorrectly.
12. Insert the ends of the line into the two holding slots (Fig. 30).
13. Insert the ends of the line through the eyelets in the outer
spool and place inner reel with spring inside the outer spool
(Fig. 31). Push the inner reel and outer spool together. While
holding the inner reel and outer spool, grasp the ends and
pull firmly to release the line from the holding slots in the reel.
NOTE: The spring must be assembled on the inner reel
before reassembling the cutting attachment.
14. Hold the inner reel in place and install the bump knob by
turning counterclockwise. Tighten securely.
INSTALLING A PREWOUND REEL
1. Hold the outer spool with one hand and unscrew the bump
knob clockwise (Fig. 23). Inspect the bolt inside the bump
knob to make sure it moves freely. Replace the bump knob
if damaged.
2. Remove the old inner reel from the outer spool (Fig. 23).
3. Remove the spring from the old inner reel (Fig. 23).
4. Place the spring in the new inner reel.
NOTE: The spring must be assembled on the inner reel
before reassembling the cutting attachment.
5. Insert the ends of the line through the eyelets in the outer
spool (Fig. 31).
MAINTENANCE AND REPAIR INSTRUCTIONS
Fig. 29
Holding Slots
Fig. 30
Spring
Fig. 31
6. Place the new inner reel inside the outer spool. Push the inner
reel and outer spool together. While holding the inner reel and
outer spool, grasp the ends and pull firmly to release the line
from the holding slots in the spool.
7. Hold the inner reel in place and install the bump knob by
turning counterclockwise. Tighten securely.
AIR FILTER MAINTENANCE
Removing the Air Filter/Muffler Cover
1. Place the choke lever in Position 2.
NOTE: The choke lever must be in Position 2 (Fig. 32) to
remove the air filter/ muffler cover.
2. Remove the four (4) screws securing the air filter/muffler
cover (Fig. 32). Use a flat blade or T20 Torx bit screwdriver.
WARNING:
always turn your trimmer off and allow it to cool
before you clean or service it.
Blue Choke
Lever
Screws
3. Pull the cover from the engine. Do not force.
Cleaning the Air Filter
Clean and re-oil the air filter every 10 hours of operation. It is an
important item to maintain. Failure to maintain the air filter will
VOID the warranty.
1. Remove air filter/muffler cover. Refer to Removing the Air
Filter/Muffler Cover.
2. Turn cover over and look inside to locate the air filter. Remove
the air filter from inside the air filter/muffler cover (Fig. 33).
3. Wash the filter in detergent and water (Fig. 34). Rinse the filter
thoroughly. Squeeze out excess water. Allow to dry completely.
Air Filter
Inside Muffler
Fig. 33
11
To prevent serious personal injury,
Position 2
Screws
Fig. 32
Cover
Fig. 34