Baroness LM2700 Manual

Technical Information Leaflet
TIL: 002
LM2700 Blade Adjustment

BARONESS LM2700 BLADE/CUT ADJUSTMENT
Before attempting to adjust the blades in order to put the machine ‘on cut’ please make sure that:
Finally, before commencing adjustment it is very important to make sure that the cutting units are
clean, especially behind the cutting cylinder between the bottom blade carrier and the cutting
cylinder. If there is build up on top of this blade carrier then this can restrict the cutting cylinder from
lowering onto the bottom blade. If necessary open up the rear grass deflector and clean the area.
The rear cutting cylinder pivot pins
must be free rotating and that this
bolt/nut is not over-tightened or
seized due to corrosion.
If it is seized: remove the bolt and
clean all surfaces (bolt and drilling)
with emery cloth. Then coat the bolt
in an anti-seize compound (Copper
Slip etc) before reinserting the bolt.
Do not tighten the nut tight. Pinch it
up and then slacken it off just a little
in order to allow the bolt to rotate.
Make sure that this spring is
sufficiently tensioned but without it
being ‘coil bound’ through over
tightened. There must be some
visible gap between each spring coil.
To adjust the spring tension, rotate
this spring pressure screw. Rotate it
anti-clockwise to add tension and
clockwise to decrease tension.
Make sure that this bolt is free
rotating and not clamping the
aluminium casting to the mower
frame. To adjust this bolt correctly,
tighten it fully and then slacken it off
a little until it rotates.

Adjusting Blade Contact
Important: Baroness blades are designed to cut with minimal contact. Never adjust them so that
they are in anything more than very light contact as this will cause friction, heat and wear to the
blades.
Whilst other manufacturers run their blades with hard contact, they are made from a softer material
which is not as durable as the Baroness. If the Baroness blades are adjusted correctly then they will
last up to 5 times longer between regrinding than other makes of blades.
To adjust the contact between cutting cylinder
and bottom blade adjust the nut.
Turning it anti-clockwise will lower the cutting
cylinder onto the bottom blade and therefore
increase contact.
Turning clockwise will raise the cutting cylinder
away from the bottom blade and decrease
contact.
To adjust blade contact you do not need to
slacken any other nuts or bolts. When you
finish adjustments do not tighten this or any
other nut. The only nut that you need to turn
during this process is the top adjustment nut.
To check that the blades are cutting
correctly use a strip of paper (as
shown).
With the strip of paper held square to
the bottom blade rotate the cutting
cylinder and see if the blades will cut
the paper. Never rotate the cutting
cylinder using your hand as the
blades are very sharp and can cause
serious injury. Use a short wooden
pole (small length of broom handle
etc) to rotate the cylinder.

If the paper is not cut you will need to lower the
cutting cylinder in order to increase blade
contact.
To do this, rotate the cylinder adjustment nut
anti-clockwise as shown.
There are two cylinder adjustment nuts, one
either side of each unit. Initially make sure you
adjust both of them by the same amount at the
same time in order to keep the cylinder parallel
to the bottom blade.
Only ever adjust them by small amounts at any
one time.
Check the cut again by using a strip of paper as
previously explained. Once again please
remember to never put your hand into the
cutting cylinder.
If the paper is still not cut correctly repeat the
above process of lowering the cutting cylinder
until the paper does cut.
If one side cuts paper but the other side does
not, lower the cutting cylinder further but only
on the side that it is not cutting.

If you are unable to achieve an acceptable cut with just a light contact by performing the above
adjustments then the blades have become a little blunt and will need back-lapping.
Once the blade is cutting paper on both sides
you need to check that you do not have
excessive blade contact.
To do this you need to use another strip of paper
but this time hold it flat along the surface of the
bottom blade as shown.
When you rotate the cutting cylinder the paper
should not be cut but should just leave an
indentation line in it. If it does this it is set ok. If
it cuts the paper then the contact is too great
and the cutting cylinder will need to be raised by
rotating the adjusting nuts clockwise.
Repeat these exercises until the paper is cut
across the full width of the unit when held
square to the bottom blade, but just leaves an
indentation line in the paper when it is held flat
along the bottom blade.
Once this is achieved the blades are correctly
adjusted.