Manual Clutch Adjustment

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Page created by T Jan 31st 2013:

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Manual Clutch Lever Adjuster and Lock Nut on an HG Manual Holden. Photo by Forunna. Click to Enlargen.

  

==Manual Clutch Adjustment:==A Clearance must exist between the Throwout Bearing and the Clutch Release Lever to prevent the Throwout Bearing from burning out. The Throwout Bearing should only be activated when the Clutch Pedal is depressed to preserve the Life of the Throwout Bearing.

The Clearance also ensures the Clutch engages fully.


===HZ Holden Clutch Pedal Adjustment:===This must be done first to avoid damage to the Clutch itself.
The Pedal Height should be 7.32 - 7.52 inches measured at right angles to the Floor.
You achieve this by removing the Lower Dash Panel Cover and the Floor Mat.
There is an Eccentric on the Clutch Pedal Pivot which has a Lock Nut holding it in Place.
Loosen the Lock Nut and rotate the Eccentric Clockwise (when facing it from the Lock Nut Side, to increase the Pedal Travel).
Loosen the Lock Nut and rotate the Eccentric anti-Clockwise (when facing it from the Lock Nut Side, to decrease the Pedal Travel).
Re-tighten the Lock Nut once the Adjustment is complete.
===HZ Holden Clutch Lever Adjustment:===Do this after the Clutch Pedal Height is correct.
1. Remove the Return Spring from the Clutch Lever.
2. Loosen the Adjuster Nut until it has obvious Freeplay.
3. Push the Clutch Lever rearward as far as it will go with the Pressure of one Finger.
4. Then take up the looseness by tightening the Adjuster Nut just enough until all the Freeplay has been taken up.
5. Refit the Return Spring.
6. Back off the Adjuster Nut exactly 1.5 Turns (in other Words rotate it anti-clockwise exactly 1.5 Turns).
7. Tighten the Lock Nut against the Adjuster Nut.

===Rat Trap:===Holdens up to HR had Hydraulically actuated Clutch Levers. These were replaced by a mechanical system called the Rat Trap.

Rat Trap Manual Clutch Lever Actuator on an HG Manual Holden. Photo by Forunna. Click to Enlargen.

===Don't Drive With One Foot Resting On The Clutch Pedal:===Driving with one Foot Resting on the Clutch Pedal will cause the Throwout Bearing to rotate and wear out quickly.  The Throwout Bearing should only be activated when the Clutch is used for changing Gear or for waiting at the Lights.
===Links:===
Forunna's Shed

Red Seat's Shed

===Terms:===Terms
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