| |
TM 55-1520-240-23-6
7-1.1
GENERAL INSPECTION OF HYDRAULIC SYSTEM COMPONENTS (GENERAL
INFORMATION)
7-1.1
INITIAL SETUP
Applicable Configurations:
All
Tools:
Technical Inspection Tool Kit, NSN 5180-00-323-5114
Materials:
None
Personnel Required:
Inspector
References:
TM 43-0105
TM 43-0139
TM 1-1520-253-23
Equipment Condition:
Off Helicopter Task
EXTERIOR SURFACES
Negligible damage
Minor scratches (without burrs or raised material)
that do not penetrate through the protective finish are
acceptable as is without rework.
Reparable damage
Nicks, gouges, corrosion pits (TM 43-0105) or other
minor surface damage that does not exceed a depth
of 10 percent or 0.040 inch of material thickness,
whichever is less after rework, are permissible.
NO BREAK - WORK HARDER
No burnishing is allowed within 0.75 inch of a bolt hole
or in a corner.
NO BREAK - WORK HARDER
Thread damage is limited to one thread with 50 percent
damage.
NO BREAK - WORK HARDER
No cracks are allowed.
If a crack in the
reservoirs/coolers, accumulators, power transfer
unit, or hydraulic pump casings is suspected, refer to
TM 1-1520-253-23.
NO BREAK - WORK HARDER
No mating or working surface repair is allowed.
NO BREAK - WORK HARDER
Touch up removed protective finish as required (TM
43-0139).
Replacement damage
Damage exceeding negligible and reparable limits, or
damage which occurs on an oil seal surface, radius,
within a hole, or on a mating or working surface of a part
necessitates replacement.
INTERNAL PARTS
Repair is limited to removal of minor burrs, nicks,
or scratches with abrasive cloth on nonworking and
nonmating surfaces. No repair of working or mating
surfaces is allowed.
Do not use crocus abrasive cloth
(E122) on aluminum parts. This
cloth contains an oxide of iron which
causes rapid corrosion of aluminum.
Use aluminum oxide or silicon carbide
paper for aluminum parts. Use crocus
cloth for steel parts.
FOLLOW-ON MAINTENANCE:
None
END OF TASK
7-14
|
