TM 5-3810-307-10
5-12.2
Extremely Low Temperature Operation [0 to -40 F (-18 to -40 C)]. The ATEC
is capable of being operated in ambient temperatures as low as -40 F (-40 C). Before the ATEC
is placed in service in low temperature environments (i.e. when temperatures below 0 F are
expected), the following preparations must be observed.
CAUTION
It is important that the preparations be performed in
the exact order specified below. Failure to follow this
order may result in degradation of the low-
temperature fluids if the preparations are being
conducted at moderate temperatures. See the
plate for a listing of fluid and lubricant usage
applicable to particular temperature ranges.
NOTE
Contact maintenance to perform the following
procedures for operation in extremely low
temperatures.
5-12.2.1
Engine Cooling System.
a.
Remove the radiator cap, and measure the specific gravity of the engine
coolant. Verify that the coolant is suitable for temperatures as low as -40 F
(-40 C). Add anti-freeze coolant as necessary to achieve this capability.
b.
Repeat the procedure in step a. for the coolant in the coolant recovery bottle.
5-12.2.2
Hydraulic System. Perform the following procedure to install low temperature fluid in
the ATEC's hydraulic system:
a.
With the crane in travel configuration, drain all oil from the hydraulic oil
reservoir.
b.
Add a sufficient quantity of OEA per MIL-L-46167 to the reservoir, that will
allow all the ATECs hydraulic cylinders to be extended completely, without
drawing down the fluid level in the reservoir to the extent that a vortex may
appear at the fluid surface when the engine is run at high speed.
Appearance of a vortex indicates that air is being drawn into the pumps
along with the fluid, which will result in serious damage to the pumps.
c.
Engage the main hydraulic pump drive and start the engine.
d.
Fully extend the outrigger beams and stabilizer jacks.
e.
Raise the boom to maximum elevation.
Change 1 5-95
