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2
COURSE CURRICULUM
COURSE OBJECTIVES
After completion of this course, you will be able to:
1) Identify components of DL-A Wheel Loaders
2) Explain functions of major components
1. Component
Location
2. Operation &
Maintenance
3. DL-A
Wheel Loader
Wheel Loader
Wheel Loader DL420A
DL 420 A
Bucket size
Model name
Tier 2 Engine
(Mechanical)
Product Naming
PRODUCT IDENTIFICATION
PRODUCT IDENTIFICATION
DWG : means that this was manufactured in Doosan(FACTORY)
CWLBB : means DL420A (MODEL)
10488 : is machine serial no. (SERIAL No.)
MAJOR COMPONENT LOCATION
Bucket
Front axle
Boom cylinder
Cabin
Bucket cylinder
Loader arm
Tilt lever
Rear axle
Counterweight
MAJOR COMPONENT FUNCTION
Front axle
Engine Hydraulic System
Transmission
Torque
Converter
► Click on the name to see image.
Front axle
Increase driving power from
transmission and transmit
increased driving power to tire
finally and stop machine by
brake system
Transmission
Increase or decrease machine
speed (Traveling power) from
engine by controlling operator
Hydraulic system Steering unit
Give steering control signal to
the flow amplifier valve by
operator steering control
Flow amplifier
Discharged HYD. oil is delivered
to steering cylinder by steering
unit control signal
CABIN COMPONENT & SWITCHES
Joystick
Head light
F.W. light
R.W. light
R. wiper
Pilot cut-off
T/M cut-off
Parking brake
Rotating beacon
► Click on the name to see image.