Countax A50 - Manual (Page 11)

Page 18 Page 11
Deck Levels - Front to Back Tyres - Check List
The Cutter Deck should be set so that it is parallel to the
surface it is cutting with a maximum variation from side to
side, or front to back of 3mm. Check this by placing the
Tractor on a hard level surface and measuring the clearance
heights front to back and side to side with a steel ruler or tape
with the Cutter set one adjustment up from its lowest position.
If the Cutter Deck seems to require levelling first check these
other possible causes:
1. Are the tyres inflated correctly all round – if not, inflate to
the correct pressures.
2. Are the Cutter Deck Hanger Brackets (fig 2) moving
freely or are they hitching up. To check this lift the cutter
deck to its highest position and lift and rock it, watching to
ensure that the brackets move freely – if not clean and
grease.
3. Is the Front Axle pivoting freely? – If not, clean and oil.
4. Is there any impact damage that has bent or distorted the
Deck or Suspension Brackets (a matter for your dealer).
If the Deck is still uneven: -
LEVELLING FRONT TO BACK
(You need two people for this operation – one to lift the Deck
while the other removes or relocates the Trunnion)
1. Ensure that the Anti-Scalp Wheels are all adjusted in the
same hole – if not, rectify (fig 3).
2. Lower the Cutter Deck to a position one above the lowest
setting – check levels with the ruler or tape.
3. Now locate the front to back Adjustment Rod to the right
(offside) of the cutter. At the rear end of this Rod, near the
rear offside wheel, you will find the Trunnion (fig 2) that
links the rod to the Deck Hanger Bracket. Both the
Trunnion and the Rod are threaded and adjustment is
achieved by rotating the Trunnion to ‘in effect’ shorten or
lengthen the Rod.
4. To free the Trunnion use a 9/16" spanner or socket to
remove the 3/8" Nyloc nut and washer and push it free.
5. Rotate the Trunnion to advance it up the Rod to lift the back
of the Deck. Rotate it the other way to lift the front.
Adjustment is rapid so try one or two turns and relocate the
Trunnion Bracket and secure – then check the effect. Repeat
and re-check if necessary.
TOOLS REQUIRED:
Steel Ruler or Tape
9/16” AF Socket
1/2” Spanner
1/2” Socket
13mm Spanner
13mm Socket
Reversible Ratchet
12” Extension Bar
fig 1
fig 2
fig 3
Front to Back
Adjustment Rod
Countax Tractors are fitted with grassland tyres that are designed to present a
large area to the ground for grip; and are soft profile to prevent marking your
turf. They are of thicker section and tougher than most 4 ply tyres.
Persistent punctures and tyre deflation are nevertheless a problem experienced
by about 5% of Countax customers. This is not a problem just for Countax
owners – it is shared by the users of all types of off-road machinery fitted with
pneumatic tyres. In practically every case there is a common cause – THORNS!
Blackthorn, Hawthorn, and Rose are usually at the bottom of it and will
puncture any tyres not fitted with very expensive guards.
There are less expensive ways to overcome this problem – so check and avoid
these possible causes:
1. The rim of the wheel has become damaged –breaking the seal on the
tubeless tyre. There are two possible solutions:
* If the damage is not severe, treat with Countax tyre sealant (Pt No 52903501).
* If the damage is significant – order a new wheel
Front wheel - (Pt No 198000500)
Rear Wheel - (Pt No 198000700)
2. You have Hawthorn, Blackthorn, or Wild Rose in your hedges – these will
puncture any tyre. It makes sense to check any area you intend to cut or drive
over and to remove any branches.
The long-term solution is to treat all four tyres with Countax tyre sealant –
follow the instructions on the bottle.
IF YOUR TYRES SPIN OR LOSE GRIP CHECK:
1. Are the tyres correctly inflated –
• Front wheels 0.8Kgf/cm (12lb PSI)* to 1.1Kgf/cm (16lb PSI)
• Rear wheels 0.43Kgf/cm (6lb PSI)* to 0.7Kgf/cm (10lb PSI)
*Pressure recommended for maximum grip.
2. Are you in too high a gear for the conditions? If so, select a lower gear or
speed setting.
Deck Hanger
Bracket
Anti-Scalp
Wheels
Trunnion
Rear Deck
Cradle
Adjustment
holes