Hi I'm Steve Copnall from Allett Mowers and today I'm going to show you how to change the belts
for the cylinder and the rear roller on a Liberty 43. First we need to remove the side guard.
So we're going to use the five millimeter allen key supplied with the machine
and we want to release the four fixings on the cover.
So now we've got access to the drive system; so the front belt we've got here is the for the
cylinder and then the rear one here is for the rear roller drive. So if we come to a situation
where the cylinder is stalling we have got the option to adjust the tension by this midway
tensioner here. That basically operates within a slot and we can put more or less tension onto
this drive belt. So using a 13mm spanner we just release the nylock in the centre we can then
adjust that pulley within the slot to put more or less tension on this drive belt. Same as if
we are looking to remove the belt as well for inspection or replacement if we release this
centre guide roller fully we can then remove the belt.
When replacing the belt so we want to locate it over the top pulley and just be careful
that there are two belt guides here so we need to sit within those. If we are located on the
outside then we are going to wear these plastic guides away so we need to just be inside those,
locate it round the bottom drive pulley and then
push the guide roller. We want about 10 millimetres of deflection
for the belt for the correct tension and then just lock lock that into position.
If we need access to the rear roller belt
to remove or just to inspect then what we need to do is first remove the cylinder drive belt.
So we're going to release the centre guide roller,
remove the belt and then we need to remove the nylock that's at the top here which is an m12
because we need to remove this pulley to get access to the belt behind. So to do that we
need to remove this side guard so we can secure the drive shaft to allow us to remove this nylock
nut. So we need to remove the cartridge first so using a five millimetre allen key
release the two cartridge securing fixings,
remove the cartridge,
we've then got access to the fixing then for this guard.
So there are three fixings on the Liberty 43
so we can then remove that tunnel guard giving us access to be able to secure the driveshaft
allowing us to remove the nylock nut. You'll also notice that the other drive belt for the motor
is also located under this cover so if you do need to replace that that's how we get access to that
that belt and also for tensioning as well. So using a 13 mil we can locate that over the shaft
and then 19 millimetre on the nylock
so when you are taking these off as well just be careful in the order that you are removing them
so remove the big pulley and then there is a spacer behind
and then the rear pulley for the rear roller belt that's in two halves as well so we just
want to take one half off and just be mindful of the actual orientation of
that when you are removing it so it will need to go on back that way so you can see the flat.
So we've now got access to that belt
for removal or inspection.
So to reinstate that we do it exactly the same way, so the belt over the rear pulley first
so over the guide roller and then again there are two guide pins so we just need
to be on the inside of those but over the top for the guide pin for the cylinder.
So we then get the half so we want the chamfered edge
against the belt and then the flat face facing yourself,
the spacer and then the larger pulley,
washer and the nylock.
Just check the belt is free to rotate and it's not caught
we can then reinstate the cylinder belt over the top inside of the two guide pins,
over the rear pulley just be careful of the edges of these
pulleys as well because they are pressed so there can be a sharp edge on there
and tension the guide roller you want about 10 millimetres of deflection on the belt
and then we can just lock that nylock.
So the belt under the tunnel guard is for your motor drive so if you're also getting slipping
from the cylinder or the drive itself it may be that this belt has stretched or is worn
so we can tension the belt here by using the four fasteners which are
fixing down the power head itself. That power head fixing location has a slot so we can release
the fixings for the powerhead to the deck and then we can
move this powerhead to put more or less tension onto the belt. So with the motor drive belt as
well if you are looking to replace that we will need to remove the power head and also this
assembly here. So to do that we need to remove the four fixings securing the power head.
So now the belt is free but we still need to get it over the the top pulley to remove
so we use a Phillips screwdriver and there are two fixings in the bottom of this plate assembly.
We can then just remove the bearing from the top shaft
allowing us to remove the drive belt.
So to replace your new belt we locate that over the top pulley,
locate the bearing at the end of the shaft then line up the two holes
and then insert the two screws.
So then we bring in the power head and you'll notice there is a drive tooth pinion
on the motor side so we insert that through position the belt over that
and then we can tension that once we've got the four fixings in for the power
head.
So if we loosely fit those
we then use the position of the motor to tension the belt. So just pushing
with your your thumb at the front just push the power head to the rear of the
machine just to tension the belt and then nip the fixings up.
So now we've secured the power head we're now ready to reinstate the tool guard
so we locate that into position,
replace the three fixings,
we can now insert the cartridge and replace the cartridge fixings
and then finally we can replace the side guard.
And that's how we replace the belts on the Liberty 43.