DIT160 Front Axles. Elizabethtown Technical College Front Axles Instructor: Doug Poteet DIT160.
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Transcript of DIT160 Front Axles. Elizabethtown Technical College Front Axles Instructor: Doug Poteet DIT160.
DIT160
Front Axles
Elizabethtown Technical College
Front Axles
Instructor: Doug Poteet
DIT160
PARTS OF A MANUAL STEERING SYSTEM
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.
CONVENTION CAB TYPE The front axle is designed to carry
about 25% of the gross vehicle weight.
CAB OVER The front axle is designed to carry
up to 35% of the total vehicle weight.
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.
TYPES OF STEER AXLES STANDARD I-BEAM ALUMINUM BEAM TUBULAR CENTER-POINT
Q1-4 Name four different designs of
axles
Q5-7 Name 3 different axle manufatures
Q8-10 Name 3 different ways the axle ID
could be displayed on a axle
STEERING KNUCKLE
COMPONENTS OF A STEERING AXLE
TAPERED KING PIN STRAIGHT KING PIN
INSPECTING VERTICAL PLAY
.001-.025 new
.001-.065 inservice
INSPECTING UPPER BUSHING FREE PLAY
Typically 0.010-.015 max
MEASURING LOWER BUSHING FREE PLAY
Typically 0.010-.015 max
TORQUE DEFLECTION
Typically 0.010-.015 max
INSPECT BEARINGS
INSPECT RACES
R & R SHIMS
NOTE:
TIE-ROD REMOVAL
PICKLE FORK
DRAW KEYS
KNUCKLE PIN REMOVAL
SEAL LIP MUST FACE THE AXLE
DRIVING BUSHINGS
HAND START BUSHING
BUSHING AND SEAL INSTALLATION
PRE-ASSEMBLY LUBE
THRUST BEARING POSTION
THRUST BEARING
VERTICAL PLAY
USE JACK TO SIMULATE LOAD
RTV
KING PIN DRAW KEY ALIGNMENT
DIT160
STEERING