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2.13. If repair is required, remove the bump knob, and
withdraw the spool. See Figure 2.13.
Ratchet wedges
Spring
Ribs
Figure 2.13
2.14. Check for: tangled line, damaged tabs on the
spool, worn ribs on the spool, missing spring,
broken ratchet wedges.
2.15. Replace the spool if it is worn or damaged.
NOTE: Bump knobs are a wearable item, and
are replaced in the course of normal use.
2.16. The housing is not fastened to the boom. It sim-
ply rests over a hexagonal drive collar.
See Figure 2.16.
Drive collar
Figure 2.16
2.17. The ratchet wedges can be serviced by remov-
Small springs behind
Tabs
2.18. Carefully remove the springs, and pull out the
Spring seats over
post on back of wedge
3
McCulloch 32cc Trimmer
ing the three screws holding the black cover to
the top of the housing. See Figure 2.17.
Figure 2.17
wedges. See Figure 2.18.
One rounded side,
insures correct orientation
Figure 2.18
Holes for screws
Cover
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