1-59. Use of Oils.
It is not advisable to mix MIL-L-7808 and ML-L-23699 oils except in cases of emer-
gency. If it becomes necessary, the system must be flushed after 6 hours of operation.
(Refer to paragraph 1-61.)
Nearly all present day lube oils contain anti-foam additives which can settle to the bot-
tom of the container. Thoroughly shake (agitate) the container prior to adding oil to the
system either at an oil change or during routine servicing.
a. Use of ML-L-23699 oil is authorized and directed for ambient temperatures above minus 25°F (-31.7°C). This
oil may also be used when MIL-L-7808 oil is not available.
b. Use of MIL-L-7808 oil is specified for operation in ambient temperatures below minus 25°F (-31.7°C). This
oil may also be used when MILL-23699 oil is not available.
1-60. Oil Change Procedure.
Lubricating Oil (item 5, Appendix D)
Paras 5-5, 8-3, 8-4 and 8-5
a. Drain the oil system.
Refer to paragraph 5-5.
b. Remove, inspect and clean
the magnetic chip detectors.