Notes

Question 1

B-Series Engine characteristics

Answer 1

4 Stroke, 12 VLV, 5.9L, 6 CYL INLINE, 4.02” Bore, 4.72” Stroke

Question 2

Horsepower/RPM for B-Series

Answer 2

6BTA5.9M2= 300HP @ 2800 RPM

Question 3

What is the difference between 6BTA5.9M1 AND 6BTA5.9M2

Answer 3

M2 is S/W Cooled

M1 is J/W Cooled

Question 4

What is the firing order of the QSM/B series?

Answer 4

1-5-3-6-2-4

15,36,24

Question 5

What is the temp of the compressed air in the cylinder for combustion?

Answer 5

1000°F or greater

Question 6

What does 6BTA5.9M2 stand for?

Answer 6

6- Model #
B- Series(FAMILY OF ENGINE)
T- Turbocharged
A- Aftercooler
5.9- Displacement in Liters
M-Marine 
2- Design Phase

Question 7

Where is the B-Series Data plate located?

Answer 7

On the gear train cover

Question 8

Where is the QSB data plate located

Answer 8

On top of the valve cover

Question 9

Purpose of Turbo and After cooler?

Answer 9

Turbo forces air to the engine while the aftercooler cools the air to allow more air into the cylinder giving bigger combustion ( air becomes more dense)

Question 10

What is the idle speed of the 6BTA

Answer 10

750 RPM

Question 11

QSB- ENGINE series characteristics

Answer 11

4 Stoke, 24 VLV, 5.9L , 6 CYL Inline, 4.02” Bore, 4.72” Stroke

Question 12

QSB5.9 Horsepower

Answer 12

210-425 HP

Question 13

What does QSB5.9 Stand for?

Answer 13

Q- Quantum
S-Series
B-Family
5.9- liters

Question 14

List what you can find on engine data plate

Answer 14

ESN, firing order, horsepower

Question 15

What two gears on the B-Series are stamped for timing?

Answer 15

Crankshaft and camshaft

Question 16

What does oil passages eliminate?

Answer 16

External piping

Question 17

Classify engine block

Answer 17

One piece cast construction
Main structural part of engine
Support and aligns all structural components
Drilled internal passages for water & oil

Question 18

Crankshaft construction

Answer 18

One piece forged steel
Cross drilled passages for lubrication
Seven main journals
Two counterweights

Question 19

Main bearing purpose

Answer 19

Main bearings assist in aligning and supporting the crankshaft in the engine block. Providing a replaceable wearing surface

Question 20

What type of main bearings

Answer 20

Tri-metal. ( aluminum, copper, steel)

Question 21

What aids in aligning a bearing in a seat

Answer 21

Tangs

Question 22

Cummins B-Series has how many main bearings?

Answer 22

7

Question 23

What is the function of a crankshaft?

Answer 23

To turn reciprocation motion to rotary motion

Question 24

What is the purpose of the crankshaft thrust bearing?

Answer 24

To absorb axial trust

Question 25

What is the purpose of the vibration dampener and what are the types ?

Answer 25

To absorb torsional vibrations of the crankshaft. Viscous, metal and rubber

Question 26

Crankshaft oil seal characteristics

Answer 26

Front seal- Teflon lay down lip ( scroll type) | Rear seal- teflon lay down lip ( scroll type)

Question 27

What is marked on the QSB Dampener

Answer 27

Marking for TDC

Question 28

When installing connecting rods or main bearing caps how are they oriented with the block

Answer 28

Cap # faces oil cooler side

Question 29

What type of vibrational dampener is used on the 6BTA5.9M

Answer 29

Viscous

Question 30

Purpose and characteristics of Camshaft

Answer 30

Camshaft is driven by the crankshaft The camshaft actuates the valve assemblies

Question 31

What is unique about the gear train?

Answer 31

Timing gears are helical type allowing quieter operation and more tooth contact

Question 32

What does the camshaft drive on the B-Series?

Answer 32

B- Series - seawater pump & fuel pump QSB- fuel pump

Question 33

How is the gear train lubricated

Answer 33

Splash lubrication and oil carry over

Question 34

Where is the thrust plate located

Answer 34

Located between the camshaft and the engine block

Question 35

What is the timing pin used to find?

Answer 35

TDC of # cylinder

Question 36

Where is the timing pin hole located

Answer 36

Backside of the camshaft

Question 37

What are pistons made of?

Answer 37

One piece cast type aluminum

Question 38

How are the pistons positioned into the cylinder?

Answer 38

Word “ front” faces towards the front of the engine.

Question 39

Purpose of a piston

Answer 39

Transfers the force of combustion to the connecting rod

Question 40

How many piston rings does B/QSB series have ?

Answer 40

3 piston rings. 2 compression rings 1 oil ring