7
4. Operation
¾
Before plugging in and switching on the machine, check to ensure
that the voltage on the rating plate is in accordance with the
voltage at your site (see type plate).
¾
The machine can be switched on and off with one hand by means
of the sliding switch
51
, which is located midway between the two
ends of the machine (see fig.).
CAUTION
¾
Do not under any circumstances switch on the machine if it has
not been properly fitted out with cutter plates!
¾
Always unplug the machine before carrying out any
maintenance work on it!
¾
Always lay the machine on a dry surface, and store it in a dry
place!
Please note
The overload switch shuts the machine down if there is excessive
pressure on the plates, if the cutting head is jammed, or if the motor is
malfunctioning. When the overload switch is activated, the head of the
switch pops out of the back of the motor cover.
Inspect the machine with the plug disconnected from the socket, and
eliminate the cause of the shutdown. The overload switch can be
turned back on after a few minutes by pressing the head of the switch,
which is at the back of the motor.
5. Oiling the cutter head
Important
¾
Oil the machine only while it is running!
¾
Never immerse the cutter head in liquid of any kind!
¾
Use either a light lubricating oil (see parts list for cutter head
GT369) or SAE 20 motor oil.
¾
Oiling hole
A
(eccentric bearing): Apply 5-10 drops of oil for every
2 hours of operation.
¾
Oiling holes
B
and
C
: Apply 5-10 drops of oil every 15 minutes.
¾
Cutter plates
1
and
2
should be kept well-oiled at all times, the
quantity of oil used varying from animal to animal (see fig.)
6. Greasing the cutter head
¾
Use only gear grease GT605!
1-2 times per shearing season:
¾
Apply approx. 1 cm of grease to opposing points on the gear
wheel
10
. Remove the cutter head (see section 9).
¾
Grease the inside of both the regulating nut
8
and the thrust
bearing sleeve
25
.
¾
Grease the clamping jaw shafts
3
and
5
.
7. Changing the cutter plates
¾
Unplug the machine before changing the cutter plates!
¾
The upper cutter plate
2
needs to be changed 2-3 times more
frequently than the lower one
1
.
¾
To do so, loosen the regulating nut
8
until the upper cutter plate
2
can be removed from beneath the clamping jaws
3
and
5
(see fig.).
¾
Then insert the new cutter plate, ensuring that both the tips
D
of
the two clamping jaws
3
and
5
, as well as the lugs
E
and the
retaining springs
4
, engage properly with their respective borings
in the upper cutter plate (see fig.).
¾
Never attempt to change the lower cutter plate
1
without first
loosening the regulating nut
8
.
¾
To do this, loosen both fixing screws
9
and pull the plate out in a
forward direction (see fig.).
¾
When reassembling, check to ensure that the lower cutter plate
1
extends ca. 2 mm beyond the upper cutter plate
2
(see fig.).
Important notes
Keep your sheep closely huddled together just prior to shearing. Doing
this will help to soften and liquefy the lanolin in their fleece, thereby
making it easier for the cutter plates to glide through the fleece and
over the sheep's skin.
If shearing is interrupted and the lanolin congeals, causing the cutter
plates to become sticky, it is best to remove the cutting plates from the
shearer and clean them thoroughly in warm water before proceeding.
After cleaning, the cutter plates should be thoroughly dried, and then
re-oiled.
8. Adjusting cutter plate pressure
Adjustment of the cutter plates should be carried out while the
machine is running.
¾
First, carefully loosen the regulating nut
8
until the upper cutter
plate
2
is no longer pressing against the lower cutter plate
1
(the
sound of the motor becomes noticeably higher-pitched) (see fig).
¾
Next, slowly turn the regulating nut
8
in a clockwise direction until
the motor begins to run slower (adjustment according to motor
sound).
¾
Avoid setting the pressure on the cutter plates too high, as this will
lead to excessive heat build-up, which in turn will cause the cutter
plates to wear out more quickly.
= high running speed = lower pressure on the
plates = less wear
Sheep shearing machine GT494 and cutter head GT369
