A good shop supervisor is

invariably a good teacher and leader and is a developer of men and women

When assigning work, carefully consider

the capabilities and experiences of your person.

As a supervisor during the planning stage you should check

on all materials like flexible hoses gauges and all consumable materials before you start working on any job.

As a supervisor during while inspecting the job you should carefully consider

·        the capabilities and experience of your person then assigning work.

The supervisor is responsible for ensuring all

post overhaul tests inspection and break-in procedures are conducted.

After an overhaul the basic run in shall be conducted

per manufactures technical manual and recorded.

A bright spot found on each end of a broken ring indicates

insufficient gap clearance.

The amount of deflection of a crankshaft may be determined by

the use of a strain gauge.

Removal of rough spots is done with

a fine oil stone.

The primary purpose of propulsion shafting is

transferring the torque generated by the main engine to the propeller.

Once the indicator has been placed in position for the first defection reading, DO NOT

touch the gauge until all four readings have been taken.

DO NOT ATTEMPT final alignment of propulsion engines/ shafting unless the following conditions are met

the vessel in the water, all permanent ballast is in place, fuel, water and temp ballast tanks are filled to normal average operating levels, generally ½ to ¾ filled, all major machinery weighing over 1,000 pounds (450kilo grams) is either installed or simulated by equivalent weights appropriately.

Bore run out is the distance the driving bore of a hub is out

of parallel with the shaft centerline.

Face run out refers to the distance the face of the hub is out of

perpendicular to the shaft centerline.

Any eccentricity or perpendicularity errors must be accounted for in

the alignment process.

At the first sign of emulsion

stop the plant and change the oil.

Symptoms of excessive clearance between a piston and cylinder are

piston slap and excessive oil consumption. Occasionally pistons and liners become sufficiently worn to permit the piston to cock over into drag on the cylinder wall

When using the load ring method the droop must be eliminated to avoid

unnecessary load on the marine transmission bearing. This location should be picked to be as close as possible to the coupling but also not in a location to interfere with the mechanics trying to take readings.

The Angular Alignment of the marine transmission to the shaft should be no more than

0.0005 inches per inch (.005 mm per cm) of companion flange outside diameter on a gap difference basis.

To check bore alignment take measurements of the diameter gap at

four equally spaced points on the flanges diameters, A, B, C, and D

To check angular alignment use a

feeler gauge at four equal spaces.

The line shaft bearings support

on the inside of the ships skin

No inspection plate, connection, fitting, or cover which permits access to the gear casing should be removed without

specific authorization by the engineer officer.

The following are potential causes of propulsion gear failure:

poor teeth contact, inadequate lubrication, foreign objects.

POOR TEETH CONTACT can result from

errors in parallelism between the mating gears which gears which may be caused by an incorrectly supported gear case or a failed bearing.

INADEQUATE LUBRICATION is caused by

low lube oil pressure, restricted or misdirected oil spray, water in the gear case.

Always check the gear tooth alignment after a major overhaul, or if

the ship has been aground or if the shaft alignment has been disturbed.

Water in oil is extremely harmful because

small amounts of water may quickly cause pitting and corrosion of teeth.

No oil,  low oil level, an empty sump or a fully clooged oil strainer can be caused by a

Damaged or worn oil pump assembly

how is a High oil Pressure stuck pressure regulation piston in selector valve assembly fixed

remove selector valve, and clean the piston per manufacture’s technical/ service manual

When should troubleshooting a propulsion transmission, what are the probable causes of no oil pressure?

Low oil level or empty sump.

Low oil level empty sump or fully clogged oil strainer are probable causes for

no marine gear oil pressure.

 Propulsion:

A good shop supervisor is

invariably a good teacher and leader and is a developer of men and women

Propulsion:

When assigning work, carefully consider

the capabilities and experiences of your person

 Propulsion:

A bright spot found on each end of a broken ring indicates

insufficient gap clearance

 Propulsion:

The amount of deflection of a crankshaft may be determined

by the use of a strain gauge.

 Propulsion:

Once the indicator has been placed in position for the first defection reading, DO NOT

touch the gauge until all four readings have been taken

Propulsion:

Removal of rough spots is done with a

fine oil stone

 Propulsion:

The primary purpose of propulsion shafting is

transfer the torque generated by the main engine to the propeller.

 Propulsion:

DO NOT ATTEMPT final alignment of propulsion engines/ shafting unless the following conditions are met

the vessel in the water, all permanent ballast is in place, fuel, water and temp ballast tanks are filled to normal average operating levels, generally ½ to ¾ filled, all major machinery weighing over 1,000 pounds (450kilo grams) is either installed or simulated by equivalent weights appropriately

 Propulsion:

Face run out refers to the distance the face of the hub is out of

perpendicular to the shaft centerline

 Propulsion:

Bore run out the distance the driving bore of a hub is out

 parallel with the shaft centerline.

 Propulsion:

Any eccentricity or perpendicularity errors must be accounted for

in the alignment process.

 Propulsion:

To check bore alignment take measurements of the diameter gap at

 four equally  spaced points on the flanges diameters, A, B, C, and D

Propulsion:

To check angular alignment use a feeler gauge at

four equal spaces

Propulsion:

No inspection plate, connection, fitting, or cover which permits access to the gear casing should be removed without

specific authorization by the engineer officer

 Propulsion:

Water in oil is extremely harmful small amounts of water may quicklycause

pitting and corrosion of teeth

Propulsion:

What should you do at the first sign of emulsion

stop the plant and change the oil

Propulsion:

The following are potential causes of propulsion gear failure

poor teeth contact, inadequate lubrication, foreign objects.

Propulsion:

POOR TEETH CONTACT: can result from

errors in parallelism between the mating gears which gears which may be caused by an incorrectly supported gear case or a failed bearing

Propulsion:

Always check the gear tooth alignment after a major overhaul, or

 if the ship has been aground or if the shaft alignment has been disturbed.

Propulsion:

INADEQUATE LUBRICATION: can cause

low lube oil pressure, restricted or misdirected oil spray, water in the gear case.

 Propulsion:

Bearing inspections at other than scheduled intervals may be required for three reasons

1. the bearing is running hotter or noisier than normal under the prevailing operating conditions

2.there is evidence of bearing material in the lube oil filter or adjacent to the bearing

3. Necessary to investigate or correct poor tooth contact.

 Propulsion:

When should troubleshooting a propulsion transmission, what are the probable causes of no oil pressure?

Low oil level or empty sump.

　Supervising an Internal Engine Overhaul

As a supervisor you will  be responsible for

directing and observing the work of others, you will have to be the subject matter expert for those actually performing the task.

COMDTINST (BLANK) contains guidance for diesel engine operating hour overhaul intervals in Table 233-1.

Who are the final authorities for determining the timing of overhauls and may elect to change the intervals specified in the Naval Engineering Manual (NEM), COMDTINST M9000.6 (series) based on the condition of the engine?

The supervisor

 (The cutter is responsible for funding any of these items.)

The general rules for working on any engine are identified what is the 1st and most critical step before starting to work on an engine? 

The following components for the engine,

shall be renewed:

Two factors that cause improper ring clearance are

(1) abnormal amount of carbon deposits on rings and in grooves and

(2) improper dimensions, new rings must have the proper thickness, width, diameter, and gap.

A bright spot found on each end of a broken ring indicates

what?

insufficient gap clearance.

　Gaps of adjacent rings should be staggered how many degrees apart to reduce gas leakage?

Piston pins are made of type of material? 

hardened steel alloy and their surfaces are precision-finished.

　Connecting rod bolts should be tightened by using wht type of tool to ensure that a predetermined turning force is applied to the nut?

　 Cracked rods should be repalced or repair?

No attempts should be made to repair cracked rods Should be repalced or repair?. They should be replaced; serious damage may result if breakage occurs during operation.

　Crankshaft breakage or bending may be the result of what?

　The amount of deflection of a crankshaft may be determined by the use of what type of gauge? 

When installing the gauge, or indicator, between the webs of a crank throw, where you should place the gauge ?

Readings are generally taken at the four crank positions:

what are they?

top dead center, inboard, near or at bottom dead center, and outboard.

Once the indicator has been placed in position for the first deflection reading what you should avoid?

DO NOT touch the gauge until all four readings have been taken and recorded.

Which of the following is one of the greatest contributions you can make as a good supervisor?

A. Watch for safety

B. Develop good leaders

C. Keep accurate reports

D. Make sure no mistakes are made during an overhaul

What step in supervising serves to identify that work has been performed properly and evaluates the skills and knowledge of personnel who have performed the work?

A. Keeping track of the work

B. Checking priority of the job

C. Checking on materials

D. Inspecting job

D. Inspecting job

During which stage of an overhaul should a supervisor order all consumables required to complete the task?

A. Execution

B. Completion

C. Planning

D. Inspection

How often will the supervisor of an engine overhaul conduct and complete a progress report?

A. Daily

B. Weekly

C. Biweekly

D. Monthly

What system does the supervisor of an engine overhaul use to document completion of the overhaul?

A. FLS

B. NEPL

C. Cutter Engineering Report for current fiscal year

D. CMplus

D. CMplus

What component(s) should you check PRIOR to engine disassembly for an overhaul?

A. Face and bore alignment between engine flywheel and flexible coupling

B. Crankshaft

C. Push rods and rocker shaft

D. Alignment of cam bearings and bushing

How long may a sea trial period be required to last in order to demonstrate proper operation of an overhauled main diesel engine?

A. 1 to 2 hours

B. 2 to 4 hours

C. 4 to 6 hours

D. 6 to 8 hours

What should you place on all exposed driveshafts, belt pulleys, or similar rotating parts prior to working on marine gear?

A. Insulation

B. Safety guards

C. Grounding cables

D. Covers

Loose, damaged, or leaking oil, fuel or coolant lines can cause _____.

A. pressure leaks

B. uncontrollable rotation of propeller

C. accidental starting

D. overheating

D. overheating

The sections of shafting outside the skin of the ship are usually supported with_____.

A. couplings

B. flanges

C. bearings

D. sleeves

What type of shaft is supported by the line shaft spring bearing?

A. Tail shaft

B. Shafting inside the ships skin

C. Fair water shaft

D. Stern tube shaft

What alignment function is used to eliminate shafted-excited vibration and noise?

A. Align bearings that support the shaft

B. Align shaft flange to reduction gear

C. Align shaft flange to main motor

D. Align shaft flange to slow-speed diesel

When should a final alignment of propulsion engines to shafting be attempted?

A. When any machinery weighing over 1,000 pounds has been removed

B. When fuel, water, and temporary ballasts are above normal operating levels

C. When all permanent ballasts have been removed

D. When the vessel is in the water

D. When the vessel is in the water

Under what circumstances can open gear cases be left unattended?

A. When the ship is at anchor

B. If satisfactory temporary closures have been installed

C. When the main shaft is locked

D. After an entry in the engineering log has been made

No inspection plate, connection, fitting, or cover that permits access to the gear casing should be removed without specific authorization by the _____.

A. engineer of the watch (EOW)

B. commanding officer (CO)

C. executive officer (XO)

D. engineer officer (EO)

Two terms used to describe gear type mechanisms are _____.

A. speed and gear ratios

B. indirect and direct drives

C. mechanical and hydraulic drives

D. forward and reverse pinions

A. speed and gear ratios

What function does the piston and spring serve on the oil return pipe assembly?

A. Cool and lubricate the forward clutch plate

B. Redirect oil to the inner seal points

C. Maintain pressure within bearing retainer

D. Regulate the low pressure oil supply

D. Regulate the low pressure oil supply

What design feature in the plate face of the driven clutch plates permits the flow of cooing and lubricating oil to pass with equal distribution?

A. Inlet ports

B. Grid pattern

C. Cross-drilled passages

D. Cast slots

To reduce the propeller revolutions per minute (rpm) and to permit the high engine rpm for operation of engine accessories, what type of assembly should be installed?

A. Trolling valve assembly

B. Selector valve assembly

C. Oil pump assembly

D. Oil heat exchanger

Which component of a propulsion transmission maintains the oil in the reduction gear sump at the proper temperature?

A. Selector valve assembly

B. Oil return pipe assembly

C. Heat exchanger

D. Orifice plate

During the wearing-in period for new gears or bearings, metal flakes and dirt NOT removed may result in a/an _____.

A. restricted oil breather assembly

B. clogged oil spray nozzle

C. output flange seal failure

D. oil relief valve failure

In the event of a hydraulic system failure of a propulsion transmission, which component is designed to allow the ship to return to port?

A. Hub and back plate

B. Sleeve-bearing mechanism

C. Reverse gear housing

D. Come-home feature

D. Come-home feature

Which of the following failures DOES NOT cause low oil pressure in a propulsion transmission?

A. Stuck regulating piston in the selector valve assembly

B. Partially clogged oil strainer

C. Broken piston rings in clutches

D. Damaged or worn oil pump

Overheating of a propulsion transmission can be attributed to _____.

A. worn or damaged rubber blocks

B. steel ball in selector valve not properly seated

C. trolling at too high an engine speed

D. clutch plates warped

A satisfactory contact percentage of gear tooth bearing contacting across the axial length of the working surface is _____ percent.

A. 60

B. 70

C. 80

D. 90

Of the following actions, which is the correct repair method for a clutch drum surface that is badly grooved or worn?

A. Sand friction lining to remove uneven wear

B. Replace worn lining

C. Rebuild worn areas of the drum surface with epoxy material

D. Re-machine drum surface as outlined in the manufacturer’s technical publication

D. Re-machine drum surface as outlined in the manufacturer’s technical publication