Tractors X60 Series. Manual - part 55

219

Maintenance

7

9

GENERAL MAINTENANCE

Brakes

Bleeding the air from the rear brake 
circuit

It becomes necessary to bleed the circuit when air enters
owing to lack of oil in the relative reservoir or when the
brake system is serviced.
This operation should be carried out by specialized per-
sonnel. If, however, you decide to do it yourself, proceed
in the following way.

1 -  Make sure that the reservoir (1) is full.

2 -  Thoroughly clean the area around the bleed screw.

3 -  Fully depress the left-hand brake pedal.

Meanwhile, unscrew the bleed screw (2) a half-turn
and allow any air and oil to flow out. Re-tighten the
bleed screw and release the pedal.

4 -  Repeat this operation until bubble-free oil flows from

the bleed screw.

5 -  Make sure that the clutch pedal travel is firm and not

spongy.

6 -  Carry  out  the  operations  described  above  for  the

right-hand brake pedal.

7 - On completion of bleeding, top up the fluid level in

the reservoir (1).

NOTE: Never reuse previously bled oil without having 
first filtered it.

CAUTION: If you need to open the bonnet, follow the procedure indicated under “How to open the bonnet”.
WARNING: Always use specific personal safety devices for each operation. 
WARNING:  Maintenance operations must be carried out with the engine off. Check that the gear and the par-
king brake are both engaged and that the ignition key has been removed.
WARNING: Beware of burns caused by hot tractor and engine parts.

 [4.1.n]

WARNING: When changing or topping up the 
brake  fluid  in  the  reservoir  (1),  be  abso-
lutely sure to use the correct type of fluid as a 
mineral-based oil is used on these machines. 
Consult the Lubricant and Fuel chart for the 
oil type.

WARNING: The oil in the brake circuits has 
been studied to operate at a temperature of 
100°C but only if not polluted by other sub-
stances, e.g. water in considerable quantities 
will turn into vapour and prevent the braking 
system  from  operating  in  the  correct  way. 
Take  the  necessary  precautions  to  prevent 
water from penetrating into the system: pro-
tect the front axle and the components in the 
braking system when the tractor is washed; 
store  oil  in  sheltered  places  where  water 
cannot  infiltrate.  If  you  think  that  there  is 
water in the braking  system you must con-
tact your dealer’s specialized personnel and 
have it removed. In this case, the rear brake 
cylinders  will  have  to  be  demounted  and 
emptied and particularly the brake housing 
of the front axle which, being the lowest part 
of the system, is the one most exposed to this 
type of fault.

220

Maintenance

Bleeding air from the front brake 
circuit

After having carefully carried out operations 1 to 7 to bleed
the rear brakes, proceed in the following way:

1 -  Depress  both  brake  pedals  at  the  same  time.  Use

the special coupling lock to keep the pedals together.
Unscrew the bleed screw (4) on the on-off valve (3)
until bubble-free oil flows out.

Re-tighten the screw and release the pedals.

2 - Depress both pedals at the same time and slacken

off the two bleed screws (5) at the rear of the central
part of the front axle.

Repeat this operation until bubble-free oil flows out.

NOTE: if the tractor is equipped with a valve for hydraulic 

trailer braking, it will also be necessary to bleed off 
any air in the piloting tube of this valve. A screw on 
the body of the valve allows this operation to be easily 
carried out.(6)

3 -  Check free pedal travel and that the front brakes act

at  the  same  time.  Do  this  by  testing  the  action  on
the road.

4 -  After having done this, top up the level in the reservoir

with oil of the prescribed type.

WARNING: Always keep the brake pedals cou-
pled for on-road driving in order to ensure si-
multaneous braking on both sides. Never use 
the brakes independently on public roads.

When  working  on  slopes,  avoid  using  the 
brakes as much as possible. Instead, select a 
lower gear and use engine braking.

GENERAL MAINTENANCE

WARNING: Always use specific personal safety devices 
for each operation. Beware of burns caused by hot 
tractor parts.

 [4.1.n]

221

Maintenance

7

9

GENERAL MAINTENANCE

WARNING: Always use specific personal safety devices 
for each operation. Beware of burns caused by hot 
tractor parts.

 [4.1.n]

Hydraulic trailer brakes

To brake the trailer along with the tractor, the flexible tube
of the trailer brakes must be connected to the fitting at
the rear of the tractor (1). Always make sure that the two
parts are clean before you connect them, to ensure that
the various components operate in a perfect way.

WARNING.  Trailer  brake  approved  for  ITALY.  When 
the tractor is operating, it is absolutely essential to 
engage the parking brake when either connecting or 
detaching the tube that links the tube of the trailer 
braking system to the quick coupling.

NOTE: Air may enter the hydraulic trailer brake circuit 
during normal servicing operations such as oil changes, 
cleaning of oil ducts. Air in the circuit leads to vibrations 
on the pedal when the brakes are used. Air can be 
easily bled from the circuit by pulling the parking brake 
lever and depressing the brake pedal several times.

222

Maintenance

GENERAL MAINTENANCE

AIR CONDITIONED CAB

The cab can be fitted with an air conditioning system on
request.

WARNING: Always use specific personal safety devices 
for each operation. 

SAFETY NOTES

The air conditioner is a safe system that is able to ensure
lasting and risk-free use. However, it is important to com-
ply with certain simple precautions (listed below) in order
to prevent possible accidents.

 Never work on the conditioning system yourselves.

Always  contact  the  specialized  technicians  of  the
Assistance Service.

 Keep naked flames well away from the air conditioning

system (Fig.5-59b) as leaking coolant could give rise
to a deadly gas: phosgene.

Air conditioning system (if equipped)

WARNING: Never attempt to open the air conditioning system. Liquid refrigerant can cause severe and 
painful frostbite. Contact your dealer, who is experienced in servicing and handling of refrigerants.

 The mixture of oil and coolant in the air conditioning

system  is  under  pressure.  Never  ever  loosen  any
unions or tamper with the pipes. For the same reason,
you must never unscrew the compressor’s oil level
check plug.

 Coolant can freeze the skin and particularly the eyes.

Proceed in the following way if accidents occur:

–  if coolant has splashed into the eyes, wash them out

immediately  with  a  few  drops  of  mineral  oil,  then
continue to wash them with a solution of boric acid
and water (one teaspoon of acid in 1/4 of a cup of
water) and immediately seek medical help;

–  areas frozen by coolant fluid can be treated by pro-

gressively warming the injured zone with cold water
and then applying a greasy cream. However, always
seek medical help if such accidents occur.

 Keep the air conditioning system well away from heat

sources as explosions could occur.

System check

The  cab  air  conditioner  is  equipped  with  a  system  to
protect  the  compressor  from  high  or  low  refrigerant
pressures.

Have your conditioning system checked once a year by
specialised personnel at your Dealer's.

DANGER: Always wear protective clothing in 
case  of  leaks.  Coolant  can  injury  the  eyes.  
The coolant produces a toxic gas if it contacts 
a flame.