ENgineering

Question 0

Horse power?

Answer 0

305HP @ 506 cubic in displacement.

Question 1

Engine make and model.

Answer 1

Cummins Onan, 6cta8.3 M1.

Question 2

Cruising/max engine rpms?

Answer 2

7kts @1800rpm.

10.5 kts @ 2300 rpm.

Question 3

Engine Rotation?

Answer 3

Engine rotates counter clockwise facing forward.
STBD rotates right hand ahead.
PORT rotates left hand ahead.

Question 4

Lube oil capacity?

Answer 4

23.2 qt/ 15w-40.

Question 5

Purpose of Air Sep system?

Answer 5

Used to separate air from oil in exhaust.

Oil goes to pan, air to turbo.

Question 6

Generator rating?

Answer 6

AC generator set is a 20kw, single phase, 120VAC, 60HZ unit, @ 1800RPM.

Question 7

Location of fuel tanks?

Capacity?

Answer 7

Located PORT & STBD at frame 4a to 5.
Access covers on 4a.
Filled to 783gal @ 95%.

Question 8

Primary fuel filters?

Answer 8

In board and aft of each engine, on suction side of fuel pump.
Filter is rated at 30 microns.

Question 9

Secondary fuel filter?

Answer 9

Port side, discharge side of fuel pump, prior to injectors.

Question 10

Where are the sea suction valves and strainers?

Answer 10

Sea suction valves for SSDG are on PORT and STBD side of SSDG.
Strainer located PORT side.

Sea suction valve and strainer for raw water system located FRWD of PORT SSDG.

Question 11

State the type of coolant system used.

Answer 11

Keel cooled cooling system.

Question 12

How are the MDE’s cooled?

Answer 12

Coolant flows from MDE, through keel cooler, to gear cooler, then back to MDE. Gear cooler transferres oil to and from MDE.

Question 13

How is the generator cooled?

Answer 13

A centrifugal engine-driven pump pumps jacket water through the engine and keel cooler.

Question 14

What components make up the cooling system on the MDE?

Answer 14

An engine driven cooling water pump, coolant reservoir, coolant filter, thermostat, reduction gear/clutch lube oil cooler and keel cooler.

Question 15

What is/does the Jacket water pump do?

Answer 15

It is a belt driven pump that provides flow of jacket water through the engine, keel cooler, and reduction gear/clutch lube oil cooler.

Question 16

What is the MDE coolant pump rated at?

Answer 16

75gpm.

Question 17

What is the MDE coolant reservoir?

Answer 17

It provides storage and expansion for a 50/50 ethylene-glycol antifreeze.

Question 18

What is the MDE coolant reservoir cap rated at, and why?

Answer 18

15psi, for filling, and to relieve excess pressure.

Question 19

What is the MDE coolant filter?

Answer 19

A cartridge type filter, must be changed when changing the coolant.

Question 20

Where is the MDE coolant filter located?

Answer 20

The filter is located next to the oil filter on the engine STBD, FRWD side.

Question 21

What does the MDE coolant thermostat do?

Answer 21

Designed to maintain the jacket water cooling temp at 180-205 *F.

Question 22

When does the MDE coolant thermostat open?

Answer 22

The thermostat should open at approximately 178 *F to permit full flow through the jacket water cooling system.

Question 23

What is the Reduction gear/clutch lube oil cooler?

Answer 23

The cooler is a shell and tube type cooler.

Question 24

How many tubes are in he reduction gear/clutch lube oil cooler?

Answer 24

151 tubes, each 1/4in diameter.

Question 25

What temperature is the Reduction gear/clutch lube oil cooler designed to maintain the oil at?

Answer 25

150-210 *F

Question 26

Where are the Keel Coolers?

Answer 26

PORT and STBD side of MDE, mounted in a recessed area under the hull.

Question 27

What is the construction of the keel cooler?

Answer 27

It is made of tubes, 6 per cooler, are approximately 40in long, and 2 1/2in diameter.

Question 29

What is the cooling system capacity?

Answer 29

7 gallons.

Question 30

What is the oil capacity of the reduction gear?

Answer 30

1.72 gal. 30w

Question 31

Where is the engine lube oil pressure regulating valve? What does it do?

Answer 31

Discharge side of oil filter. Regulates oil pressure to maintain 30-75 psi throughout normal operating range.

Question 32

What is the MDE operating lube oil pressure?

Answer 32

30-75 psi.

Question 35

Where is the transducer located?

Answer 35

Underneath the workshop. It is a hull penetration.