VMAC – Vehicle Mounted Air Compressors
Toll Free:
1-888-241-2289 Local: 1-250-740-3200
Fax: 1-250-740-3201
28
A cold climate kit (A700146) is available to preheat the hydraulic oil
at startup.
Extreme cold climate
Cold climate
Temperate climate
No tank
preheat
Tank and
suction line
preheat
Top
mounted
Enclosed
mounted
Top
mounted
Enclosed
mounted
Note 1
AW32
AW22
Note 2
AW32 AW32 AW46
Note 1
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) AW32.
Winter – when overnight temperature is consistently below 32
°
F (0
°
C)
Texaco 5606H, PetroCanada Hydrex MV Arctic 15,Shell Fluid 41, Mobil
Aero HFA, Anderol Royco 78C.
Note 2:
When possible change to AW32 during summer months.
Table 6 – Oil selection
6.2 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:
•
suction 4 ft/sec
•
return 10 ft/sec
•
pressure 20 ft/sec
For mobile hydraulics being 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 due to cavitation and motor seal failure due to excess
return line pressure can occur if proper allowance is not made for the
above factors when line sizes are being determined.
The following provides specific line sizing recommendations (inside
diameter) for vehicle hydraulic system installations intended for use
with the PREDATAIR compressor system under the following
conditions:
•
Extreme Cold Climate where temperatures are below
-4
°
F (-20
°
C)
•
Cold Climate where temperatures are below 32
°
F (0
°
C), but not
lower than -4
°
F (-20
°
C)
•
Temperate Climate where temperatures are above 32
°
F (0
°
C)
