TM 5-5420-280-10
0025 00
OPERATION UNDER UNUSUAL CONDITIONS (Contd)
LAUNCH OR RETRIEVE IN EXTREME COLD (ARCTIC OPERATION) (Contd)
8. Refer to table 5, Warm-up Step 1, and circulate oil through pallet main
hydraulic manifold by locking in hydraulic control valve KY1 for specified
duration. Refer to WP 0007 00 for operation of hydraulic control valve KY1.
Unlock KY1.
NOTE
If RCU is unavailable, lock in control valve KY1 and
manually operate control valves KY6 or KY7.
9. Refer to table 5, Warm-up Step 2, and run rear pin wheel drive by actuating
hydraulic control valves KY6 or KY 7 through working step L16 for specified
duration using RCU. Refer to WP 0016 00.
10. Refer to table 5, Warm-up Step 3, and extend and retract lower support boom
lifting cylinders using RCU as follows:
a. Actuate hydraulic control valve KY17 through working step L3 to extend
cylinders. Refer to WP 0016 00.
b. Actuate hydraulic control valve KY16 through working step R20 to retract
cylinders. Refer to WP 0020 00.
11. Refer to table 5, Warm-up step 4, and warm up winch hydraulic manifold as
follows:
CAUTION
Do not use RCU to operate KY22 to warm up winch or
damage to equipment may result.
12. If locked, unlock control valve KY1.
13. Depress and Lock-in hydraulic control valve KY22 for specified duration as
determined in table 5 below. Refer to WP 0007 00. Unlock KY22.
Table 5. Warm-up Steps.
HYDRAULIC FLUID
WARM-UP STEP
OE/HDO-30
OE/HDO-10
OEA
+5 to +20 F
-20 to +15 F
-25.6 to -15 F
Step 1
120 sec
120 sec
180 sec
Step 2
30 sec
30 sec
60 sec
Step 3
2 times
2 times
3 times
Step 4
30 sec
30 sec
60 sec
Total duration
about 6 minutes
about 6 minutes
about 10 minutes
14. Launch bridge (refer to WP0016 00) or retrieve bridge (refer to WP 0020 00).
0025 00-5
