11
4.3 HYDRAULIC POWER UNIT
1
End
cap
2
Relief
valve
3
Throttle
valve
4
Oil
return
pipe
5
Hand
valve
6
Gear
pump
7
Check
valve
8
Valve
block
9
Delivery
connection
10
Motor
11
clutch
12
Oil
filler
breathing
cover
13
Oil
tank
14
Oil
suction
pipe
15
filter
16
Oil
outlet
end
cap
17
O
‐
ring
4.4
Oil
Use
wear
proof
oil
for
hydraulic
drive,
in
conformity
with
ISO
6743/4
rules
(HM
class).
Test
standard
Features
Value
ASTM
D
1298
Density
20
℃
0.8
kg/l
ASTM
D
445
Viscosity
40
℃
32
cSt
ASTM
D
445
Viscosity
100
℃
5.43
cSt
ASTM
D
2270
Viscosity
index
104
N
o
ASTM
D
97
Pour
point
~30
℃
ASTM
D
92
Flash
point
215
℃
ASTM
D
644
Neutralization
number
0.5mg
KOH/g
Change
hydraulic
oil
at
1
year
intervals