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 TM 55-1905-223-24-2
Table 2-2. Unit Maintenance Troubleshooting-CONT
Malfunction
Test or Inspection
Corrective Action
7.
Oil in expansion tank sight glass.
STEP 1. Check for leaks in tube bundle.
Replace oil cooler tube bundle (para. 2-17).
8.
Geartrain whine.
STEP 1. Check to see if oil level is low.
Top off oil; locate cause for loss of oil (PMCS, Item 1).
STEP 2. Check for worn or chipped gears.
Intermediate general support maintenance is required. Notify your supervisor.
Section V. UNIT MAINTENANCE PROCEDURES
2-11. General. Unit level maintenance is limited to the external components of the gearbox such as: oil lines and
fittings, pressure gauge, oil filter (and elements) operation, delay tanks, etc.
2-12. Understanding Principles of Operation.
Refer to Chapter 1, Section III for a review of the principles of
operation of the reduction gear.
2-12
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