1. DIT160
Front Axles

2. Instructor: Doug Poteet
DIT160
Elizabethtown Technical College
Front Axles
Instructor: Doug Poteet

3. PARTS OF A MANUAL STEERING SYSTEM

5. AXLE FUNCTION
The main function of the front-axle assembly is to support some of the vehicles weight and to serve as the foundation for the steering components.

6. CONVENTION CAB TYPE
The front axle is designed to carry about 25% of the gross vehicle weight.

7. CAB OVER
The front axle is designed to carry up to 35% of the total vehicle weight.

8. SET BACK
For heavy hauling or construction work, the conventional cab design with a set-back front axle is preferred.
The set-back axle allows greater weight transfer to the front axle, a tighter vehicle turning circle, and a softer ride.

10. TYPES OF STEER AXLES STANDARD I-BEAM ALUMINUM BEAM TUBULAR
CENTER-POINT

11. Q1-4
Name four different designs of axles

12. Q5-7
Name 3 different axle manufatures

13. Q8-10
Name 3 different ways the axle ID could be displayed on a axle

15. STEERING KNUCKLE

16. COMPONENTS OF A STEERING AXLE

17. TAPERED KING PIN
STRAIGHT KING PIN

18. INSPECTING VERTICAL PLAY
new
inservice

19. INSPECTING UPPER BUSHING FREE PLAY
Typically max

20. MEASURING LOWER BUSHING FREE PLAY
Typically max

21. TORQUE DEFLECTION
Typically max

23. INSPECT BEARINGS

24. INSPECT RACES

25. R & R SHIMS
NOTE:

26. TIE-ROD REMOVAL

27. PICKLE FORK

28. DRAW KEYS

29. KNUCKLE PIN REMOVAL

30. SEAL LIP MUST FACE THE AXLE

31. DRIVING BUSHINGS

32. HAND START BUSHING

33. BUSHING AND SEAL INSTALLATION

34. PRE-ASSEMBLY LUBE

35. THRUST BEARING POSTION

36. VERTICAL PLAY

37. USE JACK TO SIMULATE LOAD

38. RTV

39. KING PIN DRAW KEY ALIGNMENT

40. DIT160
STEERING