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Page Title:
Test Method No. 28 Low-Temperature Test (-25F) |
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| MIL-T-52843C
APPENDIX
TEST METHOD NO. 28
LOW-TEMPERATURE TEST (-25 F)
1.
TEST APPARATUS:
a. Cold chamber.
b. Arctic clothing.
c. Thermocouples with potentiometer(s) or other temperature
measuring device.
d. Battery hydrometer.
e. Wattmeter or ammeter.
f. Voltmeter.
2.
TEST PROCEDURE:
a. Service the forklift with applicable lubricants for -25 F
operation including engine oil, transmission oil, drivetrain
lubricants, hydraulic oil and antifreeze.
b. Check the specific gravity of battery electrolyte to insure
full charge.
c. Cold soak the forklift to attain a stabilized temperature no
warmer than -25 F. During and after this period, examine the
forklift for damage. Stabilization is attained when the engine
coolant, fuel, lubricating oil, and battery temperatures reach
-25 F, as indicated by thermocouples located as follows:
(1)
In the two center cells of each battery.
(2)
In the volumetric center of the hydraulic system oil
reservoir.
(3)
In the engine lubricating oil gallery and in the oil sump.
(4)
In the engine coolant in the engine-cooling-jacket
discharge pipe.
(5)
In the chamber at a horizontal angle of 45 degrees from
the sides and ends of the truck, not less than 3 feet from
each corner of the truck at engine-crankshaft level.
d. Maintain the -25 F 5 F temperature throughout the entire
test.
e. One operator wearing arctic clothing, including mittens, shall
perform all priming and starting operations.
f. Substitute or supplementary batteries or other electrical
cranking energy shall not be used.
g. Glowplugs or other accessories working off the cranking
batteries and auxiliary fluid priming systems which are
permanently mounted on the forklift and normally used in
starting the engine may be used.
98
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