Dead Axle And Stub Axle

Question 1

What is the simplest form of steering system?

Answer 1

Tow bar assemblies

Question 2

What 3 things must be taken into consideration when using tow bar assemblies?

Answer 2

Type/size of chassis

Terrain over which equipment must travel

Manoeuvrability of MSE

Question 3

What are the 3 types of simple steering systems?

Answer 3

Chassis fixed

Fixed axle/swivel pin

Bearing mounted

Question 4

What are the simple servicing elements?

Answer 4

Ensure tow bar is clean and dry

Check for cracks and corrosion

Security of attachment of tow bar to chassis

All bearings and pivots are lubricated

Examine for correct operation

Question 5

Pivoted tow bars require what further checks?

Answer 5

Tow bar is free to move on pivot points

Check condition of pivot pins

Condition of pivot pin bearings

Question 6

What is turntable steering

Answer 6

Front wheels turn around a common pivot

Question 7

3 types of turntable steering?

Answer 7

Swivel pin

Bearing mounted

Thrust-plate mounted

Question 8

What type of bearing ensures the upper and lower ring on a bearing mounted tow bar gives smooth rotation?

Answer 8

Ball and prevents contact

Question 9

What type of turntable do you use on a larger vehicle?

Answer 9

Fifth wheel coupling

Question 10

The inspection of turntables should include..

Answer 10

Security of attachment to frame

Ensure swivel bogie is free to move

Check condition of swivel pins

Check condition of turntable thrust plates

Condition of bearing plates

All bearings are lubricated

Question 11

What is the purpose of a steering system?

Answer 11

Enable equipment to be manoeuvred safety, allowing the driver to maintain a straight ahead position with the ability to change direction with minimum effort

Question 12

What does the solid beam axle allow?

Answer 12

The weight of the front part to be supported

Relatively simple steering layout

Absorption of shocks due to surface variations

Absorption of torque created due to breaking

Question 13

What do deal axles not do?

Answer 13

Impart drive to the wheels

Question 14

What does the upswept axle allow?

Answer 14

Allow engine to be located lower down to improve the centre of gravity

Question 15

What 2 things are mounted to the stub axle?

Answer 15

One end is the hub, brakes and wheel

The other is the fitment of the stub axle to the solid beam axle by use of the king pin

Question 16

What does the kingpin allow?

Answer 16

Rotation of the stub during steering manoeuvres

Question 17

What is the most common stub axle?

Answer 17

Reverse Elliot

Question 18

What reduces excessive Wear to major components between the king pin and stub?

Answer 18

Bushes

Question 19

What are the 2 types of lubricating?

Answer 19

Bushes that are self lubricated

King pin that has internal drilling’s that direct grease through a grease nipple to the bushes

Question 20

Why is there a machined groove in the kingpin?

Answer 20

To take the cotter pin

Question 21

What is the purpose of the cotter pin?

Answer 21

Locate and lock each swivel pin in position

Question 22

Why are end caps fitted?

Answer 22

To prevent the ingress of dirt and water

Question 23

Where is the majority of the stress felt on the stub axle?

Answer 23

At the bottom interface

Question 24

What can we use to counteract the forces felt at the bottom of the stub axle?

Answer 24

Insert a thrust washer

Question 25

How can we get rid of unwanted movement in the stub axle?

Answer 25

Shims