Table 6-3. Cleaning Requirements-Continued
Interiors of Upper
Wash with a solution of
and Lower Water
P-C-436 detergent and hot
Tanks in Cooling
water. Rinse with clear
water. Remove rust depo-
sits, if required, using
Clean with Specification
TT-N-95 aliphatic naphtha.
Wipe dry and protect with
a light film of MIL-L-2104
oil. Wipe off excess oil.
Printed Circuit Board
Spray contacts with NAPASCO
Controls and Connectors
Chemical Co. cleaner SC-400.
Wipe dry with a clean, dry,
Portable Oil Unit
Check the condition of the
oil in the unit. The pre-
sence of water or discolora-
tion of the oil indicates
contamination. Drain and
refill the unit as outlined
in Section VI.
*More often, if climatic conditions or usage warrants.
6-25. Oil Filter Cleaning Procedures.
The oil filter in the METS oil system and the oil
filter in the T74 engine accessories are identical. The
following procedures are typical. Clean and inspect the
sintered element as follows:
Do not disconnect the system piping
during cleaning and inspection of the
oil filter contained in the METS oil
a. With all system power deenergized, place a
suitable container under the filter, remove the pipe plug
(1, figure 6-7), and drain the residual oil from the filter.
b. Reinstall the pipe plug (1) in the filter.
c. Remove the bolt (2) from the upper cap (3).
Use caution to prevent damage to the
teflon gasket (4) during the following
d. Carefully allow the housing (6) to separate
from the upper cap (3). Do not remove the teflon gasket
from the groove in the upper cap.
e. Remove the sintered element (5) from the
f. Clean the sintered element (5) in Specification
P-D-680 dry-cleaning solvent and blow dry with clean,
g. Visually inspect the sintered element (5) for
obvious damage. If a replacement element is required,
new upper and lower teflon gaskets are provided with
h. Install the parts in the reverse order of removal
and tighten the bolt (2) securely ,