Replacing The Blades - Honda HRM 520 Owner's Manual

Replacing the blades

To replace the blades, perform the procedures below.
N WARNING
- Put on a pair of work gloves before performing the following procedures.
- Do not touch the blade while it is spinning. You may be injured if you do so.
NOTE:
- This work requires technical skill and knowledge, as well as special tools. Consult your dealer if you
cannot perform the procedures below.
- Before replacing the blades, remove the grass clippings (M page 64) .
- Use genuine parts or their equivalent for the blade.
Replacement Item(s)
Blade
Turn the power off.
1
Adjust the height of the blades to position 1 and
turn the lawnmower upside down.
Hold the base of the blade disc with a 24 mm
2
spanner so that the blade disc does not rotate
when you rotate the nuts.
Remove the nut from each blade with a 8 mm
3
spanner.
Replace the blades, insert each blade through
4
each bolt on the blade disk, and lightly tighten a
nut with the 8 mm spanner.
NOTE:
- Tighten the nuts after the shoulders of the nut
is securely in the hole of the blade.
Tighten the nuts to the specified torque value
5
using a torque wrench.
4.4~6.0 N • m (0.45~0.60 kgf • m, 3.2~4.4 lbf • ft)
NOTE:
- If you do not have a torque wrench, have your
dealer perform the work.
- Use a torque wrench between the blade disc
and the lawnmower body.
Check that the blades rotate smoothly. If they do
6
not rotate smoothly, remove and install the nuts
again.
Nut
Maintenance procedures
Part number
72511-VP7-030
90305-VP7-000
Hold the blade disc in place
Insert a spanner between the blade
disc holder and the lawnmower
body.
Thread
Correct
Nut
Blade
Blade disc
Incorrect
Shoulder
of nut
69