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Page Title:
Test Method No. 2 Low-temperature Test (Minus 25 'F) |
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| MIL-T-52932D
APPENDIX
TEST METHOD NC?. 2
LOW-TEMPERATURE TEST (MINUS 25 `F)
1.
TEST APPARATUS:
Cold chamber.
b.
Arctic clothing.
c.
Thermocouples with potentiometer(s) or other temperature measuring
device.
d.
Battery hydrometer.
e.
Wattmeter or ammeter.
Voltmeter.
f.
2.
TEST PROCEDURE:
0
a.
Semite 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 truck to attain a stabilized temperature no warmer
than -25 `F. During and after this period, examine the truck 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 between the plates
and at middepth of the electrolyte (unless sealed
maintenance free batteries are furnished.
(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 or air cooling exhaust chamber of air cooled engines.
(5)
In the chamber at a horizontal angle of 45 degrees from the
sides and ends of the truck, not less than 3 feet (91 cm)
from each comer of the truck at engine-crankshaft level.
0
Maintain the -25 0F, 5 F, temperature throughout the entire
d.
test.
One operator wearing arctic clothing, including mittens, shall
e.
perform all priming and starting operations.
Substitute or supplementary batteries or other electrical cranking
f.
energy shall not be used.
Glowplugs working off the cranking batteries and auxiliary fluid
g.
priming systems which are permanently mounted on the truck and
normally used in starting the engine may be used.
48
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