Honda HHT31S Owner's Manual page 38

SERVICING YOUR HONDA TRIMMER
1. Install the protective plastic cover, that came
with the blade, back on the blade.
2. Insert a commercially available 4 mm hex tool
or equivalent fully into the gear case hole.
3. Turn the blade until you feel the tool drop into
the hole in cover plate/spacer A. Verify the
blade does not turn. The output shaft and
blade lock nut have a left-hand thread. Make
sure the tool remains in the hole, then loosen
the blade nut as shown. Pay attention to the
order and orientation of the parts as they are
removed.
4. Installation is the reverse of removal. Make
sure you install the blade with the cutting
edges in the direction of rotation. Be sure to
align the hole in the blade with the shoulder
on cover plate/spacer A. Tighten the blade nut
with a torque wrench.
Blade nut torque: 14 ft-lb (20 N·m, 2.0 kg-m)
Changing the Debris Shield
Refer to the applicable illustration for removing and installing the debris shields. Tighten the bolts/
washers securely with a torque wrench.
Spacer bolt/washers torque: 2.5 ft-lb (3.4 N·m, 0.34 kg-m).
36
COVER PLATE/
SPACER A
4 mm HEX TOOL
5 x 28 mm
BOLT/WASHER (4)
SPACER (2)
[3/32" (2.30 mm) thick]
CUTTING-LINE
DEBRIS SHIELD
(with cutoff knife)
TIGHTEN
COVER
SPACER B
OUTPUT SHAFT
(left-hand thread)
5 x 28 mm
BOLT/WASHER (4)
SPACER (2)
[3/32" (2.3 mm) thick]
BRUSH/WOOD BLADE
DEBRIS SHIELD
LOOSEN
10 mm LOCK NUT
(left-hand thread)
BLADE
BLADE
COVER