Clutch System Description and Operation
Clutch Spin Down Time
Inspect the clutch spin down time as follows:
1. |
Apply the parking brake and
block the vehicle wheels. |
2. |
Shift the manual transmission
into NEUTRAL. |
3. |
Start the engine. Run the
engine at idle speed. |
5. |
Disengage the clutch. Wait 9
seconds. |
6. |
Shift the transmission into
REVERSE. |
Clutch Driving Members
The clutch driving members are 2 flat surfaces machined to a
smooth finish. They include the following:
• |
The rear face of the engine
flywheel |
• |
The front face of the clutch
pressure plate |
Clutch Driven Members
The driven member is the clutch driven plate. The clutch driven
plate has a splined hub. The splined hub slides lengthwise along
the splines of the input shaft. The splined hub drives the input
shaft through these same splines. The driving and driven members
are held together with a spring pressure. This pressure is exerted
by a diaphragm spring in the clutch cover.
Hydraulic Clutch Fluid
|
Caution: Do
not use mineral or paraffin-base oil in the clutch hydraulic
system. These fluids may damage the rubber parts in the
cylinders. |
Hydraulic Clutch Operating Members
The clutch system consists of the following components:
• |
A master cylinder with a
remote reservoir and with the clutch actuator cylinder front
pipe |
• |
A clutch pedal position
sensor |
• |
An clutch actuator
cylinder |
• |
The clutch pressure
plate |
• |
The clutch driven plate
|
With the depression of the clutch pedal, the clutch master
cylinder becomes pressurized from the force of the push rod into
the master cylinder. This push rod motion forces hydraulic fluid
through the hose assembly from the master cylinder to the clutch
actuator cylinder. The clutch actuator cylinder then pushes the
release bearing into the diaphragm spring to disengage the clutch.
A hole in the bulkhead accommodates the master cylinder. A quick
connect coupling attaches the clutch actuator cylinder front pipe
assembly to the actuator cylinder. The actuator cylinder is inside
the transmission and on the input bearing retainer. The master
cylinder and clutch actuator cylinder front pipe assembly can be
replaced without having to gain access to the clutch system
internal components; simply disengage/engage the quick connect
coupling mounted through the transmission housing. No adjustments
to the clutch system are necessary. As the clutch wears, the fluid
level in the clutch reservoir changes to compensate for clutch
wear. A new system has fluid in the reservoir. The clutch pedal
position sensor on the clutch pedal/bracket assembly has 2
functions. One function is a clutch interlock, ensuring the engine
does not start unless the clutch pedal is positioned on the floor.
The second function is to cut off the cruise control system, if
equipped, when the clutch pedal is pushed downward.
|