Balancing The Blades; Replacing Blades - EMAK Oleo-Mac OM 92 Manual De Uso

Sharpening procedure:
Remove the grass catcher, tilt the machine on to the right side and prop it up using suitable
supports. It is recommended to invite another person to help with tilting the machine in
order to prevent damaging a part of the machine or an injury.
Unscrew both blades and clean them.
First sharpen with a grinder and then with a file.
Do not sharpen directly on the mowing deck.
After sharpening the blades, do not install them yet, but check their balance, see procedure below.
Prior to reinstalling the blades, check the condition of the break pins which serve as
protection of the mowing deck. If the break pins are damaged, replace them immediately.
Spare pins are supplied with the machine.
After checking the balance and the brake pins, screw the blades back in position. During installation,
ensure that the bend of the blades points upwards into the mowing deck body. Do not interchange the
left and right blades. The right blade has a bolt with a left thread.
Carefully tighten the fastening bolts using a torque wrench using the prescribed tightening torque of 30
± 3 Nm. This torque is achieved the moment when the tangential (convex) spring under the fastening
bolt is fully compressed and from this point on the bolt is not tightened.

BALANCING THE BLADES

Pay increased attention to levelling and balancing the blades. The vibration of blades that are not levelled
and balanced may damage the engine or the mowing deck.
When balancing, insert the screwdriver into the centring
hole and set the blade into a horizontal position. If the blade
remains in this position, it is balanced. If one of the ends
is weighs down, grind this side until it is balanced. When
balancing by grinding, do not shorten the length of the blade!
The permitted static imbalance may not exceed 2g.
If you are not certain about the procedure, please contact an authorised service centre,
where they will gladly provide advice.

REPLACING BLADES

If due to frequent use the blades are damaged, they cannot be balanced or sharpened properly, it is
necessary to replace them. Proceed as follows:
Remove the grass catcher, tilt the machine on to the right side and prop it up using suitable supports. It
is recommended to invite another person to help with tilting the machine in order to prevent damaging
a part of the machine or an injury.
Screw out both blades.
Prior to installing new blades, check the condition of the brake pins which serve as protection of the
mowing deck. If the break pins are damaged, replace them immediately.
Check that the blades are balanced, see above.
Screw on the new blades. During installation, ensure that the bend of the blades points upwards into
the mowing deck body. Do not interchange the left and right blades. The right blade has a bolt with
a left thread.
Carefully tighten the fastening bolts using a torque wrench using the prescribed tightening torque
of 30 ± 3 Nm. This torque is achieved the moment when the tangential (convex) spring under the
fastening bolt is fully compressed and from this point on the bolt is not tightened.
- When the blades impact a solid obstacle, immediately stop the engine and check
the blades! The break pins may be damaged or broken.
- Whenever handling the mowing blades, always use heavy-duty work gloves.
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6.3.6a
6.3.3b