H-1. GENERAL (CONT)
g. Interval Symbols. The lubrications interval symbols will be used as applicable:
Q-quarterly/3,000 mi (4,827 km) (whichever occurs first)
S-semiannually/6,000 mi (9,654 km) (whichever occurs first)
A-annually/12,000 mi (19,308 km) (whichever occurs first)
B-biennially/24,000 mi (38,616 km) (whichever occurs first)
3K-every 3,000 mi (4,827 km) (no calendar interval)
6K-every 6,000 mi (9,654 km) (no calendar interval)
12K-every 12,000 mi (19,308 km) (no calendar interval)
24K-every 24,000 mi (38,616 km) (no calendar interval)
H-2. OIL FILTERS
Oil filters shall be serviced/changed as applicable, when:
a. They are known to be contaminated, or clogged;
b. Service is recommended by AOAP laboratory analysis; or
c. At prescribed hardtime intervals while vehicle is under warranty, or if AOAP
is not available/used as required.
H-3. AOAP SAMPLING INTERVAL
WARNING
• Engine oil is hot and under pressure. The oil sampling valve releases oil proportionally to the
amount of pressure applied to valve. Activate oil sampling valve by pressing in slowly to prevent
injury to personnel. Failure to comply may result in injury to personnel.
• Wear safety goggles when taking oil sample. Oil is under pressure and could cause injury to
personnel. Failure to comply may result in injury to personnel.
Engine/transmission oil must be sampled every 90 days as prescribed by DA Pam 738-750. Hydraulic fluids must
be sampled annually as prescribed by DA Pam 738-750.
H-4. WARRANTY HARDTIME STATEMENT
"For equipment under manufacturer’s warranty, hardtime oil service intervals shall be followed. Intervals shall be
shortened if lubricants are known to be contaminated or if operation is under adverse conditions (such as longer
than usual operating hours, extended idling periods, extreme dust)."
H-2
Change 1
TM 9-2320-365-20-5
