 |
|||
|
|
|||
| ||||||||||
|
|  MIL-T-52843C
pressure drop across a new filter assembly shall not exceed 10 psi.
An automatic bypass shall be provided in the system filter and shall
open at not less than 10 psi greater than the pressure drop measured
across the new filter assembly and it shall permit full flow at a
pressure drop not greater than 35 psi. The filter housing shall have
a minimum proof pressure of 100 psi without permanent deformation,
damage, or leakage. The system filter shall be equipped with a
contamination indicator which may be remotely mounted. The indicator
shall be clearly readable without the removal of any components. As a
minimum, the indicator shall show when the filter element is clean
and when the system filter is beginning to bypass, requiring a change
of the element.
3.12.3.2 Suction filter. The pump inlet line suction filter shall
conform to 3.12.3.1 with the following exceptions:
a. The pressure drop across the new filter assembly shall not
exceed 0.75 psi.
b. At a pressure drop of 1.5 psi across the filter assembly the
automatic by-pass shall crack open and full flow pressure
override shall occur at no more than 2.5 psi.
c. The filter housing shall withstand a proof pressure not less
than 30 psi.
d. Although the suction line filter element need not be
qualified, it shall meet the performance requirements of
MIL-F-52723 except that the test terminal pressure drop
shall be 2.5 psi and average filtration ratio (B10) shall be
equal to or greater than 2.2.
3.12.3.3 Pressure filter. The pressure filter(s) shall conform to
3.12.3.1 except that proof pressure test shall be 150 percent of the
maximum system operating pressure.
3.12.4 Reservoir. A hydraulic reservoir shall be furnished to
contain the hydraulic system oil. The reservoir shall include a
filler opening, screen, cap, and other items required to function as
specified herein. The reservoir shall be mounted to prevent
vibrations that could result in leaks, loosening of fasteners,
brinelling of material, or cracks. The location shall not impair
operational visibility or access to either side of the operator's
compartment. The reservoir shall have sufficient capacity to prevent
air entering the system with all hydraulic pistons fully extended and
sufficient free air capacity to prevent oil being discharged through
the reservoir air vent when maximum return flow of oil is surged into
the reservoir from the system. The "Add" and "Full" marks on the
dipstick or sightglass(s) shall be in accordance with SAE J614b, and
shall indicate the correct oil level when the truck and forks are on
level ground, and the oil is at normal operating temperature. The
fillercap and tube shall be located to provide for filling from a
standard 5 gallon container conforming to MIL-C-1283, and to prevent
entrance of contaminants throughout filling and checking operations.
25
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals