9JS180变速器介绍

Theory Of Operation
Shift System
Found on the upper right hand side at the back of the transmission, it houses the range piston. The range switch is closed in LO and turns on a light.
Theory Of Operation
Synchronizer - How does it work?
•Synchronizer generates heat by rubbing against the intended gear cup •The rubbing causes “cup torque” •Cup torque “sets the block” •Cup torque decreases as speeds become closer (synchronized) •The driver pushes on the shift knob…causes force on the synchronizer
Theory Of Operation
Shift System
Air Filter/Regulator and Hoses:
The filter/regulator assembly filters the vehicle supply air and regulates the pressure to 4.10– 4.40 BAR .
Shift System
Shift Knob and Remote Shift Control :
The RTS(O) uses a standard gear shift lever with no air or electric controls. The gear shift lever is connected through linkage to a Remote Shift Control on the transmission. The Remote Shift Control actuates the Range Shuttle Valve for a range shift.
9JS180
331 1800
Product Identification
Shift Bar Housing - Position
Fast Gear 9JS180 Series Transmission
Theory of Operation
Theory Of Operation
Internal Identification Power flow Shift System
LO Range Supply
Theory Of Operation
Synchronizer Operation
Function of synchronizer: synchronizes or matches the output speed of the transmission and the speed of the gear being shifted into. (changes rotational speed of the intended gear - which includes the rotating part of the vehicles master clutch)
Theory of Operation
Internal Components Auxiliary Box
1. 2. Auxiliary Drive Gear Range Synchronizer
3.
4. 5.
Auxiliary Reduction Gear
Output Shaft Auxiliary Countershaft
Theory Of Operation

Range Cylinder - LO Range
Shift System
In LO range air flows from the Air Filter/Regulator to the Range Shuttle Valve and then to the Range Valve, which pushes the piston and shift fork rearward.
Theory Of Operation
Shift System
Air Hoses Remote Shift Control Range Shuttle Valve Air Hoses

Overview
Air Filter Regulator Range Cylinder
Theory Of Operation

Overview
Theory Of Operation
The transmission can be thought of as 2 separate “transmissions” combined into one unit.The first “transmission” or front section contains 6 gear sets which are shifted with the gear shift lever. The second “transmission” called the auxiliary section has two gear sets that are air shifted.
7. Countershaft 1st/5th Gear
8. Countershaft 2nd/6th Gear 9. Countershaft 3rd/7th Gear (Also used for the PTO Gear) 10. Mainshaft 4th/8th Gear 11. Input Shaft
Internal Components Mainbox
1. 3/4 and 7/8 Sliding Clutch 2. 1/2 and 5/6 Sliding Clutch 3. LO/Reverse Sliding Clutch
Theory Of Operation
4. Mainshaft
5. Countershaft Reverse Gear 6. Countershaft LO Gear
Double H Shift Pattern
R 1 3 5 7
Direct Maximum Torque Ratios Low 1 2 3 4 5 6 7 8 Reverse 1800
Overdrive 1800
L
2
4
6
8
12.650 8.380 6.220 4.570 3.400 2.460 1.830 1.340 1.000 13.22
Theory Of Operation
Power Flow Reverse Gear
Theory Of Operation
Power Flow LO Gear
Power Flow 1st Gear
Theory Of Operation
Theory Of Operation
Power Flow 2nd Gear
Fast Gear 9JS180 Service Training
Fast Gear 9JS180 Service Training Course Outline
Product Identification Theory of Operation Preventive Maintenance Troubleshooting & Service Overhaul
Theory Of Operation
Shift System

Range Cylinder- HI Range
In High range air flows from the Air Filter/Regulator to the Range Shuttle Valve and then to the Range Valve, which pushes the piston and shift fork forward.

Product Identification
9 J
Number of forward speeds mechanical Ratio set
Nomenclature
S
180 A
Twin countershaft
“X” 10 = Nominal torque capacity
Product Identification
Power Flow 3rd Gear
Theory Of Operation
Power Flow 4 Gear
Theory Of Operation th
Theory Of Operation
Power Flow 5th Gear
Theory Of Operation
Power Flow 6th Gear
Range Cylinder :
Theory of Operation
Shift System
Range Shuttle Valve :
Found on the Remote Shift Control housing. The Range Shuttle Valve is actuated by the Remote Shift Control to perform a range shift
Theory Of Operation
Power Flow 7th Gear
Theory Of Operation
Power Flow 8th Gear
Theory Of Operation
Shift System

Components
– Shift Knob and Remote Shift Control – Air Filter Regulator – Air Hoses – Range Shuttle Valve – Range Cylinder
Fast Gear 9JS180 Series Transmission
Product Identification
Product Identification
Nomenclature Serial Number Tag Shift Bar Housing - Identification
Theory Of Operation
Shift System
LO Range
Exhaust
Regulated Air Supply HI Range Supply
LO Rwenku.baidu.comnge Supply
Theory Of Operation
Shift System
HI Range
Exhaust Regulated Air Supply HI Range Supply
Model Designation Prefix
9JS180 - Roadranger Twin Countershaft (Direct) 9JS180A - Roadranger Twin Countershaft (Overdrive)
Product Identification
Shift Pattern and Ratios
Theory Of Operation
Synchronizer - How does it work?
•Eventually, the shift knob force is greater than the “blocking force” •Engagement occurs •Low force synchronizers have additional boosted feature machined into the M/S to assist with over coming the blocking force, therefore reducing amount of knob force required to synchronize the gear being engaged
10.690 7.080 5.250 3.400 2.680 2.080 1.550 1.000 0.789 11.17
Product Identification
Serial Number Tag
Serial Tag is found on the right side of the transmission.