TM 55-1925-284-14&P
GENERAL SUPPORT MAINTENANCE
MARINE SANITATION DEVICE FOR
INLAND AND COASTAL LARGE TUG (LT)
MARINE SANITATION DEVICE, REPAIR
INITIAL SETUP:
References:
Tools and Special Tools:
FM 55-502
Tool Kit, General Mechanic's (Item 1, Table 2,
TM 55-1925-273-10
Suitable Drain Pan
Materials/Parts:
Gloves, Chemical and Oil Protective (Item 1,
Goggles, Industrial (Item 2, Table 3,
Equipment Conditions:
Set to OFF the MSD DISCHARGE PUMP AND
BLOWER circuit breaker in 440V power panel
No. 4. Lock out and tag out (FM 55-502).
Strainer, Simplex (Item 1, Figure 1,
All ventilation fans operating normally (TM 55-1925-
273-10).
Personnel Required:
Two Watercraft Engineers, 88L
STRAINER REPLACEMENT
DISASSEMBLY
1. OPEN valve SD-3 SEWAGE DRAIN TO HOLDING TANK (figure 1, item 1).
MARINE SANITATION DEVICE SYSTEM
VENT
VENT
VENT
VENT
VENT
VENT
VENT
VENT
02 LEVEL
STBD PORT
SHORE SHORE
CONN CONN
01 LEVEL
SD-11 SD-10
MAIN DECK
AUX
ENGINE
MCHRY SP
ROOM
AUX
CA-84
NO. 1
MCHRY SP
SD-13
1
SD-2
NO. 1
P
SET AT
0-15
OVBD
SD-3
3 PSIG
PSIG
P
FROM
0-30
COMP AIR
CA-83
PSIG
CA-80
CA-81
BLOWER
FROM
SET AT
2
CA-82
POTABLE
PW-100
2 PSI
WATER
MSD-5
SD-9
MSD-3
MSD-6
SD-1
SEWAGE INLET
P
CHLORINATOR
0-60
P
PSIG
0-60
EFFLUENT
PSIG
MARINE
WET
SANITATION
AIR SCOUR
SD-7
SD-19
P
WELL
MSD-14
SD-8
MSD-8
B MSD-10
MSD-11
DEVICE
0-60
DISCHARGE
PSIG
SD-12
NO. 1 SEWAGE
MSD-9
MSD
SD-20
DISCH PUMP
DRAIN
DISCH
AUX
ENGINE
PUMP
PD-4
MCHRY
ROOM
SD-5
FROM WWTR SYS
SP NO. 1
MSD-13
SD-4
SEWAGE HOLDING TANK
NO. 2 SEWAGE
SD-6
DISCH PUMP
4
3
Figure 1. MSD Piping and Valve Schematic
0032 00-1