DESCRIPTION OF THE STRUCTURE
CHASSIS
OUTLINE OF THE POWER TRAIN
CLUTCH
Fungsi Clutch :
1. Memindahkan dan memutuskan tenaga
engine ke transmisi.
2. Meredam getaran pada transmisi saat
terjadi perubahan engine torque dan
speed secara tiba-tiba.
Dry Single plate Coil spring type
Coil spring type/
Diaphragm spring
Single clutch disc
Media pendingin dengan udara
KEMAMPUAN KOPLING DIPENGARUHI :
do + di
T = n. z. u. P --------------- (kgm)
4000
T = torque transmitting capacity
‘n = Faktor koreksi
Z = Jumlah permukaan yang bersinggungan
‘u = koefisien gesek
P = Tekanan total yang bekerja pada presure plate
.do = Diameter luar bidang kontak disc
.di = diameter dalam bidang kontak disc
TRANSMISI
Memperbesar torque
Memperbesar speed
Function :
1. Untuk mengatur arah gerakan ( maju-mundur)
2. Untuk mengatur kecepatan dan traksi pada berbagai kondidi operasi :
awal jalan, menanjak atau hauling material berat.
TRANSMISI
M T S 6 0 A
A,B…..S ( 19 types) : O.D
Ratio difference T.U…..Z (7 types) : D.D
Model change
Number of gear speed
4,5…9 : number of speeds
10 and above : the lower figure of number
( 0 : gear speed are 10)
Synchromesh mechanism and sub transmision
S : with synchromesh mechanism w/o sub transmission
Distance between main and counter shaft
P : 148 mm T : 165 mm
Indication of manual and auto
M : Manual A : Auto
TRANSMISI FULLER TRANSMISION
R T X 11 6 09 A
Ratio set
Number of forward speed
Design level
6 : change to multi-mesh gear mechanism
7 : change to helical gear of sub gear
Nominal torque capacity (lbs-ft)
11 : 11 x 100 lbs.ft
x : Direct Shift pattern, overdrive
none / direct drive
Twin Countershaft
Roadranger
Basic Construction
SLIDING TRANSMISION
Sliding gear
BASIC TYPE
GEAR TEETH TEND TO BE DAMAGED
THE LENGTH OF SHIFT STROKES IS LONG
fixed gear
CONSTANT MESH TRANSMISION
1. Gear teeth are not directly damaged
2. Less effort required to operate, easy
shifting and small shift lever stroke.
3. Double clutching is required when
shifting
SINCHROMESH TRANSMISION
Synchromesh Features :
• Smoot gear engagement, quiet operation during gear
shifting, less chance of gear wear and damage
• Possible of damage to synchro mechanisms due to
incorrect shift operation.
• keuntungan “ permindahan gigi transmisi tanpa harus
berhenti sehingga mempercepat cycle time truck.
DESCRIPTION OF THE STRUCTURE
GEAR RATIO
Perbandingan jumlag gigi yang diputar dengan jumlah gigi pemutar.
D
A
Jumlah gigi A = 15 Gear Ratio
Shaft 1 Shaft 2 B = 25 GEAR B GEAR D
C = 10 X
GEAR A GEAR C
D = 30
GEAR 25 GEAR 30
X
C B GEAR 15 GEAR 10
= 5.000
DESCRIPTION OF THE STRUCTURE
PROPELLER SHAFT
Fungsi mentransfer putaran dan
torque dari transmisi ke final gear.
DESCRIPTION OF THE STRUCTURE
DIFFERENTIAL GEAR Terdiri 2 bagian :
1. Final Reduction gear
Untuk meningkatkan torque.
2. Differential gear
Meredam perbedaan putaran kecepatan
roda kiri dan kanan saat berbelok dan
membuat belokan menjadi lembut
tanpa ban slip.
DESCRIPTION OF THE STRUCTURE
FINAL REDUCTION GEAR
DESCRIPTION OF THE STRUCTURE
FINAL REDUCTION GEAR
Jumlah gigi ring gear
Final Reduction gear ratio =
jumlah gigi drive pinion gear
Jumlah gigi ring gear = 39
jumlah gigi drive pinion gear = 9
Final reduction gear ratio = 39 / 9
= 4.333
TOTAL REDUCTION GEAR RATIO
= Transmition ratio x Final Reduction gear ratio
DESCRIPTION OF THE STRUCTURE
FINAL GEAR RATIO
Gradeability (tan 0) Max.speed ( km/h)
Final ratio
1:5.571
0.297
106
1:6.166
0.333
1:6.500 95
0.335
1:6.833 91
0.376
86
CHASSIS CONFIGURATION
Wheel arrangement Pay load Tr. effort performance application
common common common Short / medium distance, general
4x2 transport ( routine delivery)
common big superior General use on rough road or off-
4x4 highway
big common inferior
6x2 medium & long distance mass
transport of lightweight bulky
cargo and general cargo on paved
Very big common inferior road or level highway.
6x2
6x4 Very big big good medium & long distance mass
transport of heavy cargo on paved
road or level highway.
6x6 Very big Very big superior transport of heavy cargo on rough
roads or highways such us logging
Very big
8x4 Very big good transport of heavy cargo on paved
road or level highway.
DESCRIPTION OF THE STRUCTURE
STEERING SYSTEM
DESCRIPTION OF THE STRUCTURE
STEERING SYSTEM
DESCRIPTION OF THE STRUCTURE
STEERING SYSTEM
TURNING RADIUS
integral
lingkage
DESCRIPTION OF THE STRUCTURE
SUSPENSION
Basic function :
1. Vehicle support the weight of the body.
2. If buffer vertical vibration of wheel caused by a rough road surface
and the like and prevents their transmission to the body to protect the
cabin, driver, passenger, and cargo.
3. Improves steering stability in conjunction with the steering system.
4. It transmit lengthwise loads generated by driving force and braking
force to the vehicle body, as well as transverse loads generated during
turning.
DESCRIPTION OF THE STRUCTURE
SUSPENSION
DESCRIPTION OF THE STRUCTURE
SUSPENSION
DESCRIPTION OF THE STRUCTURE
SUSPENSION
DESCRIPTION OF THE STRUCTURE
LOAD
SPRING CONSTANT = --------- Kg/mm
SPRING DEFLECTION
Long span = smaller spring constant, better riding comfort
SPRING ------------- DURABILITY VS SOFT
SHOCK ABSORBER
A A
A A
B B B B
SINGLE ACTING DOUBLE ACTING
DESCRIPTION OF THE STRUCTURE
BRAKE SYSTEM
PARKING BRAKE
FOOT BRAKE
RETARDER
EXHAUST BRAKE
DESCRIPTION OF THE STRUCTURE
BRAKE SYSTEM MECHANICAL
NO-BOOSTER
HYDRAULIC
SERVICE BRAKE
BOOSTER HYD.VACUUM
COMPRESSED AIR
PNEUMATIC & HDY
PARKING BRAKE REAR WHEEL BRAKE LOCK
WHEEL PARK
PROPELLER SHAFT INTERNAL EXPANDING
EXTERNAL EXPANDING
AUXILIARY BRAKE
EXHAUST BRAKE
RETARDER
EMERGENCY BRAKE SPRING BRAKE
DESCRIPTION OF THE STRUCTURE
BRAKE SYSTEM
DESCRIPTION OF THE STRUCTURE
Air over hydraulic type
Full air type
DESCRIPTION OF THE STRUCTURE
FOOT BRAKE
DESCRIPTION OF THE STRUCTURE
BRAKE STRUCTURE
DESCRIPTION OF THE STRUCTURE
EXHAUST BRAKE
DESCRIPTION OF THE STRUCTURE
EXHAUST BRAKE
DESCRIPTION OF THE STRUCTURE
PARKING BRAKE
DESCRIPTION OF THE STRUCTURE
ABS = ANTILOCK BRAKE SYSTEM
DESCRIPTION OF THE STRUCTURE
ABS = ANTILOCK BRAKE SYSTEM
VEHICLE PERFORMANCE
Configuration of the vehicle
performance curve
DESCRIPTION OF THE STRUCTURE
FRAME Cross member
Side rail
Frame width
width
Center of fr.axle Center of rr.axle
height
Frame length
height
thickness
width
