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 TM 9-2520-238-34
REPAIR FINAL DRIVE ASSEMBLIES A AND B -- Continued
0020 00
RUN-IN TEST
WARNING
Lifting or moving objects in excess of 70 pounds could injure you. Make sure to get an assistant
or use a lifting device to move heavy objects.
CAUTION
Take care to prevent damage to machined surfaces, gears, bearings, and other components
during maintenance activities.
NOTE
Conduct run-in test in accordance with local operating procedures.
1.
Install sling and suitable lifting device to final drive
2.
Mount final drive in same position as in the carrier (line connecting input and output shaft center lines at 15 to 25 degrees
from vertical).
3.
Install filler tube, liquid level gage rod, vent tube and elbow, and adapter as installed in carrier (see your -20).
4.
Fill housing with oil between ADD and FULL marks on liquid level gage rod (about 3-1/2 quarts or 7 pints).
5.
Operate final drive according to the following schedule, checking for undue noise level, local heating, leaks, and
vibration at each phase:
Table 1. RUN-IN TEST SCHEDULE
Stage (rpm)
Direction
Stage Time (minutes)
900 to 1100
Forward
6 to 8
900 to 1100
Reverse
6 to 8
1900 to 2100
Forward
3 to 5
1900 to 2100
Reverse
3 to 5
2900 to 3100
Forward
1 to 3
2900 to 3100
Reverse
1 to 3
6.
Drain oil into a suitable container. Leave residual oil for use as a preservative during shipping and storage.
7.
Remove filler tube and vent components installed in Step 2 above (see your -20).
8.
Cover filler tube vent and input shaft openings.
9.
Remove sling and suitable lifting device from final drive
0020 00-13
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