TM 55-1930-209-14&P- Table C-1.  Preventive Maintenance Checks and Services for Fuel Oil System (Continued) B - Before D - Daily Q - Quarterly D - During W - Weekly S - Semiannually A - After M - Monthly A - Annually B D A D W M Q S A • If pump is loosing capacity or pressure, adjust end clearance as follows: NOTE If pump is furnished with relief valve, it is not necessary to remove valve from pump head. 1) Remove capscrews attaching head to casing. 2) Remove head gasket. 3) Install proper amount of head gaskets to provide necessary end clearance within pump, so pump turns freely with no end play. 4) Attach head to casing using cap- screws. 3 • • Storage and a. Check liquid levels in storage tanks and Day Tanks day tank before transferring fuel.  Fill tanks as necessary. • • b.  Check fuel storage and day tank visual liquid level indicators for damage.  Report mal or nonfunctioning level switches to shift leader or bargemaster. • c.  Drain and flush clean the liquid level indi- cator to reduce magnetic buildup.  Dry surfaces with a clean, lint-free cloth. • d.  Monitor proper operation of fuel storage tank liquid level switches on EMS video displays on fuel oil system. • e.  Check that day tank high level switch automatically stops fuel transfer pump when day tank is full. • f.  Check air tank escape valve frame screen and protective mesh for clogging and excessive corrosion.  Clean or replace as necessary. INTERVAL ITEM NO. ITEM TO BE INSPECTED EQUIPMENT IS NOT READY/ AVAILABLE PROCEDURES CHECK FOR HAVE REPAIRED OR ADJUSTED AS NECESSARY C-6