McElroy Acrobat EP800AD, Service Manual

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Hydr
aulic
7 - 12 Hydraulic EP800AD (Acrobat™ HPU)
Standard Hydraulic Fluids Characteristics
Manufacturer Fluid Name cSt cSt V.I. -20F -10F 0F 10F 30F 50F 70F 90F 110F 130F 150F Range Range
100F 210F
°
F
°
C
Mobil DTE 10 Excel 15 15.8 4.1 168 ************************************************** -16 - 113 -27 - 45
DTE 10 Excel 32 32.7 6.6 164 *************************************************** 12 - 154 -11 - 68
DTE 10 Excel 46 45.6 8.5 164 **************************************************** 23-173 -5 - 78
DTE 10 Excel 68 68.4 11.2 156 *************************************************** 37-196 3 - 91
Univis N-32 34.9 6.9 164 *************************************************** 12-150 -11 - 66
Univis N-46 46 8.5 163 *************************************************** 24-166 -4 - 74
Univis N-68 73.8 12.1 160 ************************************************** 39-193 4 - 89
Hydraulic Fluid
The use of proper hydraulic fluid is mandatory to achieve maximum performance and machine life. Use a clean, high quality, anti-
wear hydraulic fluid with a viscosity index (VI) of 135 minimum. It should have a maximum viscosity of 500 cSt (2000 SSU) at startup
(ambient temperature) and a minimum viscosity of 13 cSt (65 SSU) at the maximum fluid temperature (generally 80
°
F above ambient).
Using hydraulic fluids that do not meet these criteria may cause poor operation and/or damage to the hydraulic components.
The following table specifies the fluid temperature at various viscosities. Temperature rise of the hydraulic fluid can vary from 30
°
F to
about 80
°
F over the ambient temperature depending on the pressure setting, age of the pump, wind, etc. Mobil Univis N46 hydraulic
fluid is currently installed at our factory. The advantage of this fluid is a wider temperature range, however, this fluid should not be
used for continuous operation below 24
°
F.
On earlier versions of the EP800AD (Acrobat HPU), a Synthetic 46 Hydraulic Fluid was used and should continue to be used on those
HPUs.
NOTE: This chart is based on pump manufacturer recommendations of 13 to 500 cSt.
NOTE: Temperatures shown are fluid temperatures. – NOT ambient temperatures.
Hydraulic Power Unit Lubricant Capacity Specification/Notes
EP800AD (Acrobat HPU) with
3 micron filter Mobil Univis N46 hydraulic
fluid 0.375 gal (1.41 liters) Installed at factory. Use chart
below to select a different fluid.
EP800AD (Acrobat HPU) with
10 micron filter incorporated in
hydraulic manifold Synthetic 46 hydraulic fluid 0.375 gal (1.41 liters) HPUs with manifold incorporated
cartridge filter.