TM 10-4630-207-13&P
UNIT MAINTENANCE
WASTE WATER VACUUM TANK TRAILER
NSN 4630-01-513-8155
WASTEWATER TANK
SERVICE
INITIAL SETUP:
Tools
Personnel Required
Cleaner, Steam Pressure Jet, Trailer Mounted
77W Water Treatment Specialist
Materials/Parts
Equipment Condition
Apron, Rubber (WP 0089 00, Table 2, Item 1)
WWET/T empty, at atmospheric pressure
Calcium Hypochlorite (WP 0091 00, Item 4)
Tank cleaned and sanitized
Coveralls, Hooded (WP 0089 00, Table 2, Item 2)
Engine shut off
Gloves, Rubber (WP 0089, Table 2, Item 4)
Ignition key removed
Goggles, Splash (WP 0089 00, Table 2, Item 6)
Emergency stop button pushed in
Rags, Wiping (WP 0091 00, Item 28)
Wheel chocked
Respirator (WP 0089 00, Table 2, Item 8)
Emergency brake set
Manway open
CLEANING AND SANITIZING
The WWET/T tank requires periodic emptying and steam cleaning to maintain the proper function of the
primary shutoff mechanism, drain valve, and float level indicator linkage. In addition, whenever access to
the tank interior is required, or repairs to the primary shutoff, manway, float level indicator, hoses, or oil
catch muffler are necessary, the tank and/or applicable component must be disinfected as described in
paragraph 8.
1. Empty the wastewater tank as described under Tank Draining Operation in WP 0005 00. Ensure
isolation valve is in the open position and the pressure gage reads ∅ (zero).
WARNING
Protective clothing and equipment must be worn. A heavy-duty rubber apron,
rubber gloves, respirator, safety splash goggles and/or face shield are
required when potential exists for contact with wastewater or contaminated
surfaces. Wastewater and surfaces may be contaminated with pathogenic
microorganisms, bacteria or viruses, which present a risk of serious illness or
death to personnel. Refer to cleaning and sanitizing procedures in this work
procedure.
WARNING
Relieve pressure before opening intake and drain valves, or rear hatch.
Manway cover may freeze or stick to hatch rim. To prevent serious injuries,
do not remove swing bolts until cover is free of the manway rim.
2. Remove dust covers from intake (figure 1, item 1) and drain valve (figure 1, item 2). Open both
intake and drain valves as described under Tank Filling Operation, and Tank Draining Operation in WP
0018 00-1
