Zetor Proxima 70 2012, Operator'S Manual

Page: 165 / 214

164
MAINTENANCE INSTRUCTIONS
G733 E740 E741
WORKING PRESSURE OF AIR BRAKES
In case of a single hose (1) and double-
hose (2) designs, air pressure on the
double-hose coupling head (red capsule)
is 740 ± 20 kPa and on the single-hose
coupling head is 600 ± 20 kPa max. (at-
the moment when pressure regulator re-
lieves the compressor by blowing off).
MAINTENANCE OF THE AIR-
CONDITIONING (A/C) SYSTEM
Cleaning of the A/C condenser is
the most important part of main-
tenance of this equipment (it is installed
in front of the engine radiator).
Clogged A/C condenser reduces effec-
tiveness of cooling of the A/C system as
well as cooling of the engine.
Open the bonnet, screw off the nut (1)
and slide the radiator to the side and
purge it using compressed air or flush it
pressurised water (against direction of
drive).
Then slide the radiator back to its posi-
tion and fix it properly. Pay attention to
correct arrangement of hoses to the oil
cooler.
With correct function of the A/C system,
water condensates in the roof space of
the cabin. Condensate is drained by
hoses in columns of the cabin and flows
out in lower ends of the columns. There-
fore pay attention to the hoses that
should not be clogged to drain conden-
sate.