Clutch pedal adjustment problem

Tiny
CPT HENRY
  • MEMBER
  • 1997 CHEVROLET S-10
  • 2.2L
  • 4 CYL
  • 2WD
  • MANUAL
  • 175,000 MILES
New parts: clutch plate, hydraulic donut cylinder and throughout bearing, replaced all new. Five speed transmission replaced (used).
Problem: The clutch engages at close to bottom of the pedal.
When it went into the shop, clutch engaged at the top of the pedal (normal).

Transmission problem, fixed.
Clutch problem, new.
Thursday, October 4th, 2018 AT 2:58 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

There is no adjustment of the clutch. It is hydraulic control.

Make sure there is no air in the system by re-bleeding it.

As far as engagement, engaging at the bottom is normal. When it engages at the top, that is an indication of a worn clutch.

Roy

The clutch release system consist of a combined clutch master cylinder, reservoir, switch, and actuator cylinder connected to the hydraulic tubing.

When the clutch pedal is depressed, the clutch master cylinder push rod is forced into the clutch master cylinder causing the clutch master cylinder to become pressurized. Hydraulic fluid is then forced down the hydraulic tubing from the clutch master cylinder to the concentric slave cylinder. When the hydraulic fluid is pushed into the slave cylinder, the slave cylinder engages by pushing the release bearing into the diaphragm spring and releasing the clutch.

The clutch master cylinder is positioned through the cowl panel. The hydraulic tubing is routed from the clutch master cylinder to the concentric slave cylinder via a quick connect coupling. The concentric slave cylinder is located inside the transmission on the transmission input bearing retainer.

Replacement of the hydraulic control system is made easier because the hydraulic tubing connecting the slave cylinder to the master cylinder can be removed from the slave cylinder by engaging the quick connect coupling mounted through the transmission housing. This allows replacement of the hydraulic line, master cylinder, and push-rod assembly with out having to gain access into the transmission clutch housing.

A two function switch, located on the push rod, is used as a clutch interlock to ensure the engine can not be started unless the clutch pedal is engaged (positioned to the floor). A second function of the switch is to cut off the cruise control system (if the vehicle is so equipped) when the clutch pedal is engaged.

The hydraulic clutch system provides automatic clutch adjustment. No clutch pedal free-travel adjustment is required.
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Thursday, October 4th, 2018 AT 4:28 AM
Tiny
CPT HENRY
  • MEMBER
  • 2 POSTS
The clutch problem was resolved with thirty second continuous pumping of the clutch pedal. This is the bleeding process for the self bleeding donut type cylinder.
Please note: that clutch engagement at the top of the petal is normal and in my list of parts replaced was the entire list of clutch parts, ie. The clutch plate kit, throughout bearing and donut cylinder.
I am a happy camper now!
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Friday, October 5th, 2018 AT 3:03 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Glad you got it fixed and it works.

Roy
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Friday, October 5th, 2018 AT 3:10 AM

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