Struggling with Clutch

[chewindust]

Hi guys,
I'm hoping someone can help give me some ideas of what else I can check. A quick background on what I have done concerning the clutch over about 3 or so years. Put clutch in and no pressure to return, searched and found slave cylinder to be the problem. Replaced slave cylinder. Clutch started slipping then wouldn't work so I put clutch kit in. Then discovered piston in master cylinder not returning so I replaced the master cylinder. Put foot on clutch and it went all the way to the floor without engaging clutch. Found a split in one of the rubber lines near the slave cylinder so I replaced that. Now the problem is that the peddle will go all the way to the floor but won't spring back. The clutch is engaging and I can change gears but I have to bring peddle back with my foot. I have checked the slave cylinder and it seems ok although I have noticed I can push the clutch fork to the slave cylinder with my hand. I don't think I had ever done that before and I thought it should be hard to do that. I also looked at the old master cylinder and when I replaced it I am still using the same push rod that comes out from the booster. What else can I look at?

[pearcey]

G`Day mate.
Pushing the fork back to the slave is ok as the slave is non adjustable.
Does the pedal return with the engine turned off and the boaster bled of vacuum.

[Turtle_au]

Isn't there a spring in the pedal assembly to bring the pedal back up?


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[dom14]

Isn't there a spring in the pedal assembly to bring the pedal back up?


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That's what I was thinking.
Usually there is a spring. I wonder if somehow that's popped out of place?!

[chewindust]

Thanks guys, I checked that spring on the pedal and it is fine. I also pushed the pedal before I started it and it was coming back a bit then would stop and then pop all the way back. But that only happened a couple times and then I had to help it. When I started it I pumped the pedal a couple times and it came back at first then didn't come back again. I have examined the vacuum hoses and I remember replacing a couple but have seen a couple hoses that definitely need replacing so I will go in and get some hoses today. It probably hasn't helped that the old girl has been sitting for a fair while.

[dom14]

Thanks guys, I checked that spring on the pedal and it is fine. I also pushed the pedal before I started it and it was coming back a bit then would stop and then pop all the way back. But that only happened a couple times and then I had to help it. When I started it I pumped the pedal a couple times and it came back at first then didn't come back again. I have examined the vacuum hoses and I remember replacing a couple but have seen a couple hoses that definitely need replacing so I will go in and get some hoses today. It probably hasn't helped that the old girl has been sitting for a fair while.

Yeah, but I'm not sure vacuum leaks in the booster or the vacuum lines can produce those symptoms.
I would think the pedal would be tad harder without vacuum assist.
Ideally a malfunctioning vacuum booster shouldn't affect the pedal return, I reckon.

I think something else is going on with your clutch. Be it, air bubbles trapped inside, master pump or slave pump issues or the actual clutch getting jammed inside somehow.

[chewindust]

Well after replacing the vacuum hoses. Nothing changed. So I got in under the dash to have a look at the top of the pedal to check the spring or even see anything else that might be out of the ordinary and I could not see anything broken damaged or even leaking. I followed the line and cannot see any leaks there either. I'm going to get a mechanic to have a look at why she won't go past 80 on the road and I'll see if they might be able to find the issue for the clutch too.

[mudski]

GQ or GU? Sounds like a vacuum issue. The GQs have a rebuildable clutch booster, a rebuild kit is available for them, the GU's don't.

[pearcey]

Thanks guys, I checked that spring on the pedal and it is fine. I also pushed the pedal before I started it and it was coming back a bit then would stop and then pop all the way back. But that only happened a couple times and then I had to help it. When I started it I pumped the pedal a couple times and it came back at first then didn't come back again. I have examined the vacuum hoses and I remember replacing a couple but have seen a couple hoses that definitely need replacing so I will go in and get some hoses today. It probably hasn't helped that the old girl has been sitting for a fair while.

Was this happening before or after the clutch replacement?
If it was there before , have a look at the clutch fork as it may be cracked or worn on the pivot. All so check the pivot adjustment.

[dom14]

GQ or GU? Sounds like a vacuum issue. The GQs have a rebuildable clutch booster, a rebuild kit is available for them, the GU's don't.

TB and TD42's come with a clutch booster obviously, but RB30 doesn't have a vacuum assisted clutch booster. Not sure about the RD28.