![Sampo Rosenlew Comia c4 Instruction Book Download Page 117](http://html.mh-extra.com/html/sampo-rosenlew/comia-c4/comia-c4_instruction-book_805454117.webp)
– 115 –
R10a
R11b
R12
HYDRAULICS
+\GURVWDWLF7UDFWLRQ7UDQVPLVVLRQ
General Description
Traction hydraulics and working hydraulics use a joint
oil tank and
¿
lter. Both systems have their own pumps.
Hydrostatic steering gets its oil from working hydraulics
by means of a priority valve. The valve always supplies
the amount of oil needed in steering and the rest can be
used in other hydraulics.
There is also an oil cooler in the system located in the
traction hydraulics return line before the
¿
lter.
The control valves in working hydraulics are electrically
controlled and located at the front beneath the right side
guard.
There are two valves: the lower valve houses the control
valves of table height and free circulation; the higher
valve houses the control valves of the reel and unload-
ing pipe. Movement speeds are regulated by restrictors
at the control valve gates except for the table lowering
speed, which can be adjusted.
Pump output in working hydraulics is 25 l
min.
Working pressure is restricted to 180 Bar.
Pump output in traction hydraulics is 170 l
min.
Working pressure is 400 Bar
Adjustment of Table Lowering Speed
The table lowering speed can be adjusted steplessly by
regulating knob A,
¿
g. R12, on the valve.
'DLO\6HUYLFH
The oil tank is in the engine compartment. Periodic
service measures include checking of the oil level and
changing of the oil and
¿
lters. To check the oil level,
there is transparent measuring glass A,
¿
g, R11b, on the
oil tank. The oil level must be visible in the glass, near
the maximum, with the cutting table and the reel low-
ered. New pure oil is added through
¿
ller B, when nec-
essary. Before unplugging the
¿
ller, clean the whole area
carefully to prevent any impurities from getting into the
tank. Keep the area around the oil tank always clean.
Daily service measures also include checking and, if
necessary, cleaning of the oil cooler. The cooler is posi-
tioned at the front of the engine radiator.
Oil Change
The oil and
¿
lters are changed every 600 h or at least
once a year before the beginning of the harvesting sea-
son to remove any condensed water from the system
after the winter. The oil is drained by opening drain A,
¿
g. R10a. After draining of the oil, replace
¿
lter cartridge
C. Clean the area round the
¿
lter carefully before remov-
ing the
¿
lter. Check and, if necessary, change the
¿
lter
cover gasket before re
¿
tting. Use original
¿
lters only to
ensure perfect functioning of transmission. Fill the
¿
lter
housing with pure oil before closing the cover.
Summary of Contents for Comia c4
Page 2: ......
Page 16: ... 14 ...
Page 126: ... 124 C8 C8 C8 LUBRICATION DIAGRAM ...
Page 134: ... 132 M3 ...
Page 136: ... 134 M6 ...
Page 137: ... 135 M7 ...