Dead Axle and Stub Axle Flashcards
What type of steering is used on most HGV’s?
Solid Beam Front Axle
What tow bar steering systems are there?
- Chassis Fixed
- Bearing mounted
- Fixed Axle/Swivel Pin
What factors must be considered when making a tow bar steering system?
- Type/Size of chassis
- Terrain over which the equipment must travel
- Manoeuvrability of MSE
What is the simplest form of steering system?
Tow bar assemblies
What 3 types of turntable steering are there?
- Swivel pin mounted
- Bearing mounted
- Thrust plate mounted
In a bearing mounted steering system where is the upper and lower rings mounted?
- Upper connected to the chassis
- Lower connected to the frame
What prevents wear in a bearing mounted steering system?
Ball bearings between the upper and lower ring
What should turntable assembly inspections include?
- Security of attachment to chassis frame
- Ensure bogie of turntable is free to move
- Condition of swivel pins
- Condition of turntable thrust plates
What further checks need to be done on pivoted tow bars?
- Check tow bar is free to move on the pivot pins
- Check condition of pivot pins
- Check condition of pivot pin bearings
What are the service elements on a tow bar steering system?
- Examine for any cracks or corrosion
- Security of attachment of tow bar to chassis
- Bearings and pivot pins are correctly lubricated
- Examine all components for correct operation
What prevents downward stress on a solid beam axle with stub axle?
Thrust washer
How do we remove unwanted movement between the axle and stub axle?
With shims
What can a king pin have to prevent the ingress of water and dirt?
An end cap
What is the purpose of a cotter pin in a stub axle?
To lock the king/swivel pin in place
What are the 2 ways of lubricating bushes and the king pin?
- Grease galleries in the king pin
- Self lubricating bushes
