Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161208-55793-9xooaejs:136:3912)
    at m.mountComponent (/tmp/execjs20161208-55793-9xooaejs:47:15602)
    at /tmp/execjs20161208-55793-9xooaejs:49:31860
    at a.r.perform (/tmp/execjs20161208-55793-9xooaejs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161208-55793-9xooaejs:49:31821)
    at r (/tmp/execjs20161208-55793-9xooaejs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161208-55793-9xooaejs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161208-55793-9xooaejs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161208-55793-9xooaejs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161208-55793-9xooaejs:173:8

Q: How Does a Clutch Work?

asked by on

How does a clutch work in a manual transmission?

A: A clutch for a manual transmission is not a...

A clutch for a manual transmission is not a single part, but many parts put together to form the clutch assembly that is part of the clutch system. The parts in a clutch assembly are the clutch pressure plate, clutch disc, clutch release bearing, flywheel, clutch release fork and pilot bearing. The clutch system consists of the clutch assembly, clutch cable, clutch pedal, and bracket. Some clutch systems use hydraulics to move the clutch instead of the clutch cable. The system has a clutch master cylinder, fluid pressure line, clutch slave cylinder, and a different release fork or no fork at all, mounted on the front of the transmission.

The clutch pressure plate is bolted to the flywheel with the clutch disc sandwiched between them. The pressure plate keeps high pressure on the clutch disc causing it to press against the flywheel. The clutch disc has material mounted to it with rivets or glue similar to brake pad material. The disc has center splines that slide on and lock to the transmission input shaft. The input shaft is supported on its tip by a pilot bearing or bushing in the center of the flywheel or rear of crankshaft. The clutch release bearing slides on the front of the transmission and is pressed on the pressure plate fingers to release its pressure on the clutch disc. This allows the engine and transmission to spin free of each other.

The clutch operation starts with the operator pressing in the clutch pedal. The pedal arm will pull in on the cable or the arm will push in on the rod to the clutch master cylinder. The cable will pull on the clutch release fork or the clutch hydraulic slave cylinder will press in the clutch fork. The fork or slave cylinder pushes in the release bearing to press on the clutch pressure plate to release the clutch. As the pressure plate is pressed, it takes off pressure on the clutch disc and allows the transmission to be shifted. Once a gear is selected, the clutch pedal is released and the pressure plate then applies pressure on the clutch disc. As pressure is applied, the clutch disc is locked to the pressure plate and flywheel to turn the transmission input shaft.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Car not shifting out of reverse

If your vehicle is a standard you might have a problem with a synchronizer inside the transmission. Synchronizers are what allow you to shift from one gear to the next without hearing a grinding sound. Disassembly of the transmission is...

Q: Clutch slipping on manual transmission

Unfortunately, the Mazda clutch is a hydraulic system that has no adjustments. If the clutch is slipping the clutch disc is most likely either worn or the pressure plate is faulty. The clutch system will need to be inspected and...

Q: Car won't shift when driving

Hello. If you cannot move the shifter from park, then you may have a shift interlock problem. This can be caused by a failing brake switch, but most of the time it is caused by a failure in the wiring...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...