21 JANUARY 2003
10.3.6.3.1. Check all exposed piping, valves, and associated equipment for corrosion.
Prepare the surface and repaint as necessary.
10.3.6.3.2. Piping identification must conform to MIL-STD-161. Repaint as necessary.
10.3.7.1. Check for unusual noise, vibration, over-heating, leaks, and oil level.
Lubricate pumps and motors as recommended by
FREQUENCY: Quarterly, or as recommended by the manufacturer.
10.3.7.3. Product Recovery Tank Pump. The pump should start when the liquid level reaches
70% of the tank's total capacity, and shut off when the level is pumped down to 20%.
10.3.8. Manual Valves.
10.3.8.1. Lubricated Plug. Inspect all lubricated plug valves for ease of operation. If lubrication
is needed due to difficult operation, replace the valves immediately with non-lubricated valves.
All lubricated plug valves must be scheduled for replacement.
10.3.8.2. Gate. Lubricate and operate to prevent seizing. Adjust/replace packing as needed.
10.3.8.3. Non-Lubricated Plug Valves. Inspect for ease of operation. Adjust packing and
maintain operators per manufacturer's specifications.
10.3.8.4. Ball. Inspect for ease of operation and lubricate operators.
10.3.9. Filter Separator (F/S).
10.3.9.1. F/S Element. At the last point of filtration in the fixed system, replace elements at 15
psi DP, or every three years, whichever comes first. Replace elements at all other locations at 20
psi DP, or every three years, whichever comes first. During element replacement, clean the
interior surfaces of the F/S vessel and second-stage element(s) (see paragraph 3.3 for detailed
instructions). Use API edition 4 or 5 elements. Funding will be provided by DESC.
10.3.9.2. Determining DP. DP is measured at the rated flow of the vessel (e.g., 20 psi at 2271
liters per minute [600 gallons per minute]). If two 2271-liter-per-minute pumps discharge
through four F/Ss, then a DP of 10 psi at 1135 liters per minute (300 gallons per minute) would
be equal to 20 psi at 2271 liters per minute. Before changing out elements, verify the pressure
drop at 2271 liters per minute by isolating the F/S so it receives a flow of 2271 liters per minute
and measure the DP. This is particularly critical with Type III systems where fuel from a
varying number of pumps flows through multiple F/Ss. In older systems where a 4542-liter-per-
minute (1200-gallon-per-minute) filter vessel is dedicated to a 2271-liter-per-minute pump,
change out the elements as if it were a 2271-liter-per-minute vessel. If the DP across a vessel
suddenly drops 3 psi or more at the same flow rate, check the vessel for a damaged element.