Honda Miimo HRM310, Owner'S Manual

Page: 70 / 88

68
Maintenance procedures
Checking the blades and blade disc
Check the condition of the blades and blade disc as follows.
Life time of the blades
In order to have good cutting performance, maintain the sharp cutting edge on the blades. Typically, the life
time of the blades is 160 hours.(2 weeks to 2 months) Because the life time depends on grass condition, it may
be necessary to exchange earlier than usual, especially in the spring season.
If your grass develops brown tips at the ends, this is a sign that the blades are not cutting cleanly and require
replacement.
Example: if the lawn mower works for 11.4 hours per day every day, the life time of the blades is 2 weeks.
If the lawn mower works for 2.6 hours per day every day, the life time of the blades is 2 months.
N
WARNING
- Do not touch the blades with your hands.
- Make sure to press the manual STOP button and turn the lawn mower off before performing the
following procedures.
NOTE:
- Hold the lawn mower against a wall for support.
- Do not lift the lawn mower off of the ground while checking it.
Check the blades, nuts and blade disc for problems.
Check item(s) Action
Blades and nuts
Damage to the blades
Visually inspect the blades.
If they are damaged, replace the blades. See “Replacing
the blades” (
M
page 69).
Loosened bases of the
blades
Rotate the nuts with your fi nger to check that they are tight.
If the nuts are loose, tighten them to the speci fi ed torque
value. See “Replacing the blades” (
M
page 69).
Abrasions of the holes of
blades and abrasions of the
shoulders of nuts
Visually inspect for abrasions of the hole of blades and
the abrasions of the shoulder of nuts.
While mowing, the hole of the blades will widen and the shoulder
of the nuts will decrease in size because of abrasions, and there
is a danger that the blades will be detached from the blade disc.
If they are worn, replace the three blades and nuts if
necessary. See “Replacing the blades” (
M
page 69).
Blade disc Warping of the blade disc
Rotate the blade disc and visually check it.
If it is warped, consult your dealer.
Normal Damaged blades
Checking the abrasions of
blades and nuts
Excessively worn
0.87 in (22.2 mm)
Correct Incorrect
0.99 in (25.2 mm)
Cracked Bent
Blade disc
Base of the blade
Checking the abrasions
of the shoulders of nuts
Correct Incorrect