TM 55-1930-209-14&P-19 Table 6-2.  Preventive Maintenance Checks and Services for Shore Discharge System (Continued) B - Before D - Daily Q -  Quarterly D - During W - Weekly S -  Semiannually A - After M - Monthly A -  Annually INTERVAL ITEM PROCEDURES EQUIPMENT ITEM TO BE CHECK FOR AND HAVE IS NOT READY/ NO. INSPECTED REPAIRED OR ADJUSTED AVAILABLE IF B   D   A   D  W  M   Q   S   A AS NECESSARY 7 Hydraulic a. With hose reel winch control lever in Power Unit NEUTRAL position on Barge 1 or in OFF Piston Pump position on barges 2 and 3, check that piston pump low (return) and high (sup- ply) pressure gauge readings are the same. b. If the 2 readings differ, zero bias by adjusting zero adjustment screen (socket-headscrew) on end of piston pump. 8 Hydraulic a. Check supply pressure gauge.  If neces- Pressure gauge Power Supply and sary replace filter element as follows: cracked or bro- Return Filters ken. 1)   Unscrew old filter. 2)   Coat gasket on new filter with light coat of oil. 3)   Screw on new filter. 4)   When operating after replacement, check for leaks and make sure indica- tor is operating normally. b. Check return pressure gauge.  If neces- Pressure gauge sary, replace filter element as follows: cracked or bro- ken. 1)   Turn bypass valve to bypass filter. 2)   Unscrew old filter. 3)   Coat gasket on new filter with light coat of oil. 4)   Screw on new filter. 5)   Turn bypass valve to allow flow through filter. 6)   When operating after replacement, check for leaks and make sure indica- tor is operating normally. 6-6