Air-Conditioning Maintenance; Draining Condensate From The Air Reservoir; Checking The Air Systems For Leaks - Zetor PROXIMA HS Series Operator's Manual

Air-conditioning maintenance

The most important element of maintenance of
the air-conditioning system is cleaning the AC
condenser (it is installed in front of the engine cooler).
If the AC condenser is clogged, it does not only
reduce the cooling efficiency of the AC system but
also the efficiency of the engine cooling.
Remove the front side plate of the hood, release and slide
the cooler towards the side and clean the condenser with
pressurized air or pressurized water (against the driving
direction of the tractor). Then, slide the cooler back and fix
it properly. Be careful about the proper routing of hoses to
the oil cooler.
When the air-conditioning functions properly, water
condenses in the roof space of the cab and the
condensate is drained through hoses in the cab pillars and
runs out at the bottom side of the pillar. This is why you
must make sure that the condensate drain hoses will not
be blocked.

Draining condensate from the air reservoir

Drain condensate by pulling the ring to deflect the
bleeding valve.
The valve is installed on the air accumulator bottom.

Checking the air systems for leaks

- fill the air reservoir to the maximum pressure (730 ± 20
kPa).
- with the engine stopped the air pressure must not drop
by more than 10 kPa in 10 minutes.
Perform the leak check daily before driving with
a trailer or semi-trailer. In case of a brake system
failure or if the pressure drops below 450 ± 30 kPa, the
warning indicator on the dashboard will light up.
MAINTENANCE INSTRUCTIONS
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