Yard-Man YM155 - Manual (Page 11)

11
MAINTENANCE AND REPAIR INSTRUCTIONS
SERVICING DOUBLE INSULATED UNITS
This unit is double-insulated. In a double-insulated unit,
two systems of insulation are provided instead of
grounding. There is no grounding provided and no
means of grounding should be added to this unit.
Extreme care and knowledge of the system is required
when servicing a double-insulated unit. Service should
be performed by qualified service personnel only.
Replacement parts for a double-insulated unit must be
identical to the parts they replace. Refer any repair to an
authorized service dealer. A double-insulated unit is
marked with the words “double insulation” or “double
insulated.”
LINE INSTALLATION
Always use genuine original equipment manufacturer
0.080 in. (2.03 mm.) replacement line. Using line other
than specified may cause the unit to overheat or fail.
There are two methods to replace the trimmer line:
• Wind the inner reel with new line
• Install a prewound inner reel
Winding the Existing Reel
1. Remove the bump head cover by pressing in both
bump head cover tabs visible on either side of the
bump head outer spool (Fig. 11).
NOTE: The spring will push the cover up when the tabs
release.
2. Remove the inner reel and spring (Fig. 11).
3. Use a clean cloth to wipe the inner surface of the
outer spool (Fig. 11).
The warranty on this unit does not cover items that have
been subjected to operator abuse or negligence. To
receive full value from the warranty, the operator must
maintain the unit as instructed in this operator’s manual.
Outer Spool
Spring
Inner Reel
Press Tabs
Bump Head
Cover
Fig. 11
Indexing Teeth
Inner Reel Hole
4. Check the indexing teeth on the inner reel and outer
spool for wear (Fig. 12). If necessary, remove burrs
or replace the reel and spool.
NOTE: Always clean the inner reel, outer spool and shaft
before reassembling the bump head.
5. Take approximately 12 feet (3.6 m) of new trimming
line and insert one end of the line into the hole in the
inner reel (Fig. 13).
6. Wind the line, in even and tight layers, onto the reel
(Fig. 13). Wind the line in the direction indicated on
the inner reel.
NOTE: Failure to wind the line in the direction indicated
will cause the bump head to operate incorrectly.
Fig. 12
Fig. 13
To prevent serious
personal injury,
remove or disconnect the battery before
servicing, cleaning or removing material from
the unit.
WARNING:
Battery tools do not
have to be plugged
into an electrical outlet; therefore, they are
always in operating condition. To prevent
serious personal injury, take extra
precaution and care when performing
maintenance or repair.
WARNING:
Never use metal-
reinforced line, wire,
chain or rope. These can break off and
become dangerous projectiles.
WARNING: