Clutch Spin Down Time
Check the clutch spin down time as follows:
- Apply the parking brake. Block the vehicle wheels.
- Shift the manual transmission into neutral.
- Start the engine. Run the engine at idle speed.
- Engage the clutch.
- Disengage the clutch. Wait 9 seconds.
- Shift the transmission into reverse.
- If you hear a grinding noise, refer to
Release Bearing Noisy with Clutch Engaged
.
Clutch Driving Members
The clutch driving members are 2 flat surfaces machined to a smooth
finish:
• | 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 pressure plate.
Hydraulic Clutch Fluid
Notice: Do not use mineral or paraffin-base oil in the clutch hydraulic
system. These fluids may damage the rubber parts in the cylinders.
When refilling the system or adding fluid after service, use GM Delco
Supreme No. 2 Brake Fluid, or equivalent that meets DOT 3 specifications.
Hydraulic Clutch Operating Members
The clutch system consists of the following components:
• | A master cylinder with a reservoir |
• | A concentric slave cylinder connected to hydraulic tubing |
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 forces hydraulic fluid into the tubing from the master cylinder to the
concentric slave cylinder. The concentric slave cylinder then engages by
pushing the releasing bearing into the diaphragm spring and release the clutch.
A hole in the cowl panel accommodates the master cylinder. A quick connect
coupling helps route the hydraulic tubing. the concentric slave cylinder
is inside the transmission and on the input bearing retainer. The hydraulic
control system can be replaced without having to gain access to the clutch
system internal components , simply 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 master cylinder reservoir
changes to compensates for clear wear. A new system will have fluid in the
reservoir. An electrical switch on the push rod has 2 functions. One function
is a clutch interlock, ensuring the engine does not start unless the clutch
pedal is engaged (positioned to the floor). The second function is to cut
off the cruise-control system (if so equipped) when the clutch pedal is engaged.