Honda HRX537C Owner's Manual page 54

7. MAINTENANCE
Blade Installation
1. Clean dirt and grass from around the blade mounting area.
2. Install the blades [1] using the two blade bolts [2] and special washers [3]
as shown.
Be sure to install the special washers [3] with the concave side toward the
blade(s) and the convex side toward the head of the bolts.
The blade bolts [2] are specially designed for this application and must not
be replaced with other bolts.
3. Tighten the blade bolts [2] with a torque wrench [4]. Use a wooden block to
prevent the blades [1] from turning.
Blade bolt torque: 49 ~ 59 N·m
If you do not have a torque wrench, have an authorized Honda dealer
tighten the blade bolts before you use the mower. If the blade bolts are
overtightened, they could break. If the blade bolts are not tightened
enough, they could loosen or come out. In either case, it would be possible
for the blade(s) to fly off while you are operating the mower.
[4]
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[3]
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