TM 55-1925-284-14&P
UNIT MAINTENANCE
MARINE SANITATION DEVICE FOR
INLAND AND COASTAL LARGE TUG (LT)
BLOWER ASSEMBLY, BLOWER; REPAIR
INITIAL SETUP:
Tools and Special Tools:
References:
Tool Kit, General Mechanic's (Item 1, Table 2,
FM 55-502
TM 55-1925-273-10
Materials/Parts:
Gloves, Chemical and Oil Protective (Item 1,
Table 3, WP 0038 00)
Goggles, Industrial, (Item 2, Table 3,
Tag, Danger (Item 7, Table 1, WP 0039 00)
Equipment Conditions:
Tape, Antiseizing (Item 8, Table 1, WP 0039 00)
Set to OFF the MSD DISCHARGE PUMP AND
Valve, Relief (Item 3, Figure 3, WP 0037 00)
BLOWER circuit breaker in 440V power panel
No. 4. Lock out and tag out (FM 55-502).
Personnel Required:
All ventilation systems operating normally (TM 55-
Two Watercraft Engineers, 88L
1925-273-10).
BLOWER DISCHARGE PRESSURE RELIEF VALVE REPLACEMENT
REMOVAL
WARNING
Toxic and flammable vapors are generated in the sewage system. Provide venti-
lation from outside source. Avoid open flames and prolonged breathing of fumes.
Failure to comply with warning can result in serious injury to personnel, and dam-
age to equipment.
Sewage is a common mode of transmission for parasitic organisms that may
have the capability of causing communicable diseases. After coming in contact
with sewage or contaminated equipment, be sure to clean yourself with a disin-
fectant soap. Avoid sewage contact with skin abrasions, punctures, cuts, and
other open wounds. Wipe up and clean any spills and/or contaminated equip-
ment using a disinfectant soap. Failure to comply with this warning can result in
serious illness.
1. Remove the relief valve (figure 1, item 1) from the 90o elbow (figure 1, item 2) by rotating the relief valve until
it separates from the piping.
2. Cover or plug the remaining open piping to prevent contamination from entering the Marine Sanitation Device
(MSD) piping.
0022 00-1
