SECTION 3: INSTALLATION
CAS80R
PAGE - 10
Manual # 99905932 (February 2016)
IOWA MOLD TOOLING CO., INC.
(641) 923-3711 • www.imt.com
®
3.6.1 HYDRAULIC OIL REQUIREMENTS
Depending upon situational, or seasonal,
climate types, the viscosity of the oil can be
affected by temperature conditions. For
these particular cases, cold and/or extreme
condition augmentations to the hydraulic
system may be warranted.
TABLE 3B
shows a suggested approach to oil viscosity
types, proportional to listed environmental
conditions.
3.7 HYDRAULIC LINE SIZING
Industrial hydraulic system design guidelines
generally call for the following maximum fluid
velocities, which are then used to select line
sizes for any particular GPM:
In regard to a particular hydraulic system
GPM, line sizing selection for maximized
fluid velocity is matched via industrial
hydraulic system guidelines, that include:
• Suction @ 4 ft/sec
• Return @ 10 ft/sec
• Pressure @ 20 ft/sec
In cases where mobile hydraulics are to be
added to a pre-built chassis, the above
guidelines are not comprehensive due to the
following factors:
• Extreme start-up temperature variations
• Long suction line
• Piggy-backing of motor case drain flow
onto main return line
Pump failure, caused by cavitation of the
circulating fluid; and motor seal breakdown
due to excess return line pressure, can occur
if proper allowances are not taken for the
above factors when determining line sizing.
NOTE
This table should be used as guideline
when choosing the hydraulic oil best
suited for working condition. Consultation
with a professional hydraulic system
installer is strongly recommended to
determine the optimal hydraulic oil type
best matched for the operating conditions.
NOTE
Note that line size refers to the inside
diameter of the hose.
For cold weather operation below 0°F, the
next larger size hoses should be used.
TABLE 3A - OIL SELECTION GUIDE
EXTREME COLD CLIMATE
COLD CLIMATE
TEMPERATE CLIMATE
-40 to 32°F
0 to 80°F
32 to 120°F
No tank preheat
Tank and suction
line preheat
Open-Mounted
Enclosed-
Mounted
Open-Mounted
Enclosed-
Mounted
I
AW 32
AW 22
II
AW 32
AW 32
AW 46
I
A seasonal hydraulic oil change is recommended to get best component life. Recommended oils include:
Summer - When overnight temperatures do not go below 32°F (0°C), use AW 32.
Winter - When overnight temperatures is consistently below 32°F (0°C), use Texaco 5606H, PetroCanada Hydrex
MV Arctic 15, Shell fluid 41, Mobil Aero HFA, Anderol Royco 78C.
II
When possible, change to AW 32 during summer months.
Summary of Contents for IMT CAS80R
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