Ammann ARR 1575 Yanmar, Operating Manual

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81 ARR 1575
OPERATION MANUAL
2.9.3. Machine operation under high tempera-
tures and humidity
• Engine power output decreases with increasing tempera-
ture and air humidity. Both power reducing factors are inde-
pendent on each other:
- a rise in temperature by every 10 °C (50 °F) results in a
drop of power output by up to 4 % (at constant humid-
ity)
- a rise in relative humidity by every 10 % results in a drop
of power output by up to 2 % (at constant temperature).
Note
The maximum permitted oil temperature for VG 46 class oil is
80 °C (144 °F); the maximum permitted oil temperature for VG
32 class oil is 70 °C (158 °F)
In the environment where hydraulic oil temperature remains
constantly around 90 °C (194 °F), we recommend exchanging
the hydraulic oil with oil which is one-class denser, with HV 68
cinematic viscosity.
2.9.4. Machine operation at higher altitudes
• In higher altitude, engine power output decreases as a re-
sult of lower atmospheric pressure and specific density of
incoming air.
• The engine is equipped with an altitude sensor which ad-
justs fuel injection, eliminating the black smoke effect dur-
ing operation of the machine at higher altitudes, in accord-
ance with the EPA regulation.
• This function is activated automatically at the altitude of 800
m above sea level, and from this altitude up the engine out-
put power is gradually reduced. For instance, at the altitude
of 2000 m above sea level, the power output is reduced by
20 % of the maximum power output in regular conditions
and the torque is reduced by 30 % (refer to the table).
Altitude (m above sea level) 0 1000 2000 3000
Power output reduction (%) 0 10 20 30
Max. torque reduction (%) 0 20 30 35
The engine power depends on the environment in which
the machine is working.
2.9.5. Machine operation in very dusty envi-
ronment
• When working in very dusty environment, please shorten
the intervals of cleaning and replacing of the air filter ele-
ments and shorten the intervals of cleaning of the coolers.
• The recommended interval of cleaning is once a week.
2.9.6. Driving with vibrations on compacted
and hard materials
When operating the Machine with vibration on hard materi-
als (e.g. stony loose material), or with high level of compacting
the base material, there can be even loss of contact between
the drum and the material compacted (so called vibro-hit).
This state will show in the increased vibration transfer into the
Machine frame. Its partial elimination is possible via increasing
the travel speed or changing the Machine vibration parameters
(with the use of lower amplitude).
The driving with vibration on hard (frozen, concrete,
overcompacted) surface or on bedrock is forbidden.
There is a danger of damage to the machine.