TM 10-4630-207-13&P
UNIT MAINTENANCE
WASTE WATER VACUUM TANK TRAILER
NSN 4630-01-513-8155
SAFETY RELIEF VALVE
INSPECT, REPLACE
INITIAL SETUP:
Tools
Personnel Required
Tool Kit, General Mechanic's, Automotive (WP
MOS 63B, Light Vehicle Mechanic
Materials/Parts
Equipment Condition
Gasket, Safety Relief (WP 0091 00, Item 17)
Tank empty, at atmospheric pressure
Gloves, Rubber (WP 0089 00, Table 2, Item 4)
Engine shut off
Rags, Wiping(WP 0091 00, Item 28)
Ignition key removed
Respirator (WP 0089 00, Table 2, Item 8)
Emergency stop button pushed in
Wheel chocked
Emergency brake set
INSPECT
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 WP 0018
1. Inspect the safety relief valve (figure 1, item 1) for damage, missing, or loose mounting hardware.
2. Replace missing and tighten loose hardware.
REPLACE
1. Ensure isolation valve is open and pressure gage on the oil catch muffler reads zero.
2. Loosen and remove the four hex nuts (figure 1, item 2) from the flange studs (figure 1, item 3).
3. Remove safety relief valve (figure 1, item 1) from flange (figure 1, item 4).
0020 00-1
