Zetor PROXIMA POWER Z90 2012, Operator'S Manual

Page: 185 / 222

184
MAINTENANCE INSTRUCTIONS
X227 E740 E741
WORKING PRESSURE OF AIR BRAKES
In the single- (1) and double-hose (2)
version the air pressure at the double-
hose coupling (red cap) is 740 ± 20 kPa
and at the single-hose coupling max.
600 ± 20 kPa (at the moment the pres-
sure controller relieves the compressor -
blows out the air).
AIR-CONDITIONING MAINTENANCE
The most important element of
maintenance of the air-conditi-
oning 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.
Open the hood, remove the nut (1) 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 pro-
perly, 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 con-
densate drain hoses will not be blocked.