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 TM 55-1905-223-24-2
SECTION IV. REMARKS
MAIN REDUCTION GEAR
REFERENCE
REMARKS
CODE
A
Depot maintenance will be performed on a case by case basis subject to approval
and funding by the National Maintenance Point (NMP).
B
These components are grouped for tracking purposes and continuity with the
RPSTL only. Replacement and repair are by individual parts replacement.
C
This item is a candidate for direct exchange.
D
Gear P/N WAV 850-R2 must be mounted in hot condition when replaced. Vendor
contact is required for additional instructions.
E
Filters are to be deaned as required and replaced upon deterioration or on
gumming beyond cleaning capability.
F
Casings P/N WAV 850-G2, G1, G82, and G98 are machined to fit and must be
ordered and replaced as a unit upon failure of any one component.
G
Visual inspection for obvious defects such as broken, loose or missing compon nts
e
or hardware.
H
Operational test prior to departure on mission.
I
Includes lubrication checks and cleaning of filters.
J
First change or cleaning of oil to be accomplished after approximately 100 hours of
operation; subsequent changes every 6 months or 2000 operating hours.
K
Crew level maintenance consists of replacement of external line replacement units
such as valves, changeover filter, filter cartridges and heat exchanger.
L
Organizational maintenance includes K above and external h rdware such as
a
pipes, unions, etc.
M
Direct support includes repairs down to the upper and lower casings G1 and G2.
N
Maintenance inside the casings will normally be performed by general support level
and determination made for higher level maintenance and unit replacement if
required.
O
Consists of replacement of entire unit if failure or mission requirements so
determine.
P
Upper bearings to be changed after 29,000 hours of operation.
Q
Lower bearings to be changed after 115,000 hours o operation.
f
R
When ordering this component the part number must be preceded by the serial
number stamped on the reduction gear data plate.
*U.S. GOVERNMENT PRINTING OFFICE: 1994 - 555-028/00209
Change 4
B-7/(B-8 blank)
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