TM 55-1680-358-12 & P
SECTION I. GENERAL
3-1. General. The Helicopter Internal Cargo Handling
System does not require scheduled service and
maintenance. However, it must always be inspected
prior to use, after storage, after extended periods of
non-use, etc., to make certain that the system functions
correctly. These instructions are provided in paragraph
SECTION II. MAINTENANCE
3-2. Periodic Lubrication. Normally the Helicopter
Internal Cargo Handling System requires no periodic
lubrication. However, if the cargo system has been
assemblies with close-fitting parts may function more
efficiently if a dry lubricant is used (Specification MIL-L-
46147, NSN 9150-00168-2000).
Avoid prolonged breathing of
vapors and minimize skin contact.
Do not use cleaning solvent P-D-
680 on rollers.
3-3. Cleaning. The Helicopter Internal Cargo Handling
System must be kept clean. It may be hosed down.
Remove sand, dust, and dirt from all operating parts. If
hosing down is not adequate, use dry cleaning solvent,
Specification P-D-680, on all components EXCEPT ALL
3-4. Inspection. Inspect the system as follows:
Handling System should be inspected prior to each
cargo mission or when any of the following events has
or will occur.
A new cargo handling system has just
A cargo system has been removed from
storage and installed.
A system has been idle in an out-of-
Maintenance has recently been performed
and the system has not been inspected.
A system appears to function improperly.
Inspection Criteria. A general inspection should
be accomplished for any one of the reasons indicated in
paragraph 3-4a. Inspection also helps to maintain the
Helicopter Internal Cargo Handling System in good
working condition. Refer to Table 2-1. Make certain
that all components shown in the table are accounted for
in either the installed or stowed locations as applicable.
After this has been accomplished, inspect the Helicopter
Internal Cargo Handling System against the illustrations
(Figures 2-1 through 2-15). Make certain that all cargo
system components are properly installed. Check
outboard rail/roller assemblies, stations 158.500 to
274.000 (1 and 2, Figure 3-2); stations 272.531 to
374.000 (3 and 4); stations 373.469 to 487.000 (5 and
6); left-hand ramp guide rail/roller assembly (7); right-
hand ramp guide rail/roller assembly (8); inboard
guide/roller assemblies, stations 157.750 to 272.188 (9);
stations 272.313 to 377.188 (10); stations 377.313 to
427.188 (11); and stations 427.375 to 487.000 (12); left-
hand inboard ramp