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Pedal pivot woes.

Posted: Tue Jul 02, 2019 7:32 pm
by BrianHawley
I have just noticed that when I push the clutch in, the brake pedal pushes back slightly. Not much, maybe an 8th of an inch, but you can definitely feel it. Same with engine running or not.

I’m guessing this is play in the bearings supporting the clutch pedal shaft on which the brake pedal pivots, as the brake pedal pushes back. If it was the brake pedal binding to the shaft I would expect it to move forward when the clutch was pressed.

My question is how much movement (if any) is “normal”? Is this a big deal for immediate attention, or leave until next time I have the carpets out?

Haven’t had it up on the ramps to take a look yet, but may do so at the weekend.

Re: Pedal pivot woes.

Posted: Tue Jul 02, 2019 10:19 pm
by Dean
Not familiar with working in that area, but I guess it's one of those take the gearbox panel off and take a look while pressing the clutch. It's a long shot but it might just need some lubrication. Good luck.

Can't really comment on if it's right that it does move, other than I guess it shouldn't and you should be looking at it.

Re: Pedal pivot woes.

Posted: Tue Jul 02, 2019 10:47 pm
by philthehill
There should be no movement of the brake pedal when the clutch pedal is pushed down.

I suspect that when the clutch is pressed down the brake pedal return spring pulls the brake up the last 1/8".

As above I would suggest that lack of lubrication is the root cause of the problem.

Fitting a grease nipple to the brake pedal will help considerably.
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Re: Pedal pivot woes.

Posted: Tue Jul 02, 2019 11:21 pm
by les
Just finished a service and grease up, this post is a timely reminder to include the brake pedal, I fitted a nipple during the rebuild but forgot to include it in this recent work. I’ll be rectifying this now ! :D

Re: Pedal pivot woes.

Posted: Wed Jul 03, 2019 1:45 am
by BrianHawley
Thanks guys, all useful information.

Looks like a carpets out and gearbox cover off job.

I’ve had a look up on the ramps and nothing is obviously loose, so let’s hope it’s just lube. If not, then the shaft comes out for inspection and maybe replacement and new bearings. Fitting a grease nipple is a good tip. Thanks Phil and Les.

Re: Pedal pivot woes.

Posted: Wed Jul 03, 2019 10:26 am
by simmitc
You do not need to remove the entire gearbox cover to lubricate the shaft, only the smaller plate over the master cylinder. However, if there is movement of both pedals then that usually means that the shaft on the clutch pedal is worn and/or the bearing inside the brake opedal. You will need to remove the full cover to remove the clutch pedal. A new bearing for the brake pedal can be pressed in wih a vice, but the clutch pedal shaft will need replacing - it is welded to the pedal, and usually available as a complete reconditioned unit if required.

Re: Pedal pivot woes.

Posted: Wed Jul 03, 2019 11:31 am
by BrianHawley
simmitc wrote:
Wed Jul 03, 2019 10:26 am
You do not need to remove the entire gearbox cover to lubricate the shaft, only the smaller plate over the master cylinder. However, if there is movement of both pedals then that usually means that the shaft on the clutch pedal is worn and/or the bearing inside the brake opedal. You will need to remove the full cover to remove the clutch pedal. A new bearing for the brake pedal can be pressed in wih a vice, but the clutch pedal shaft will need replacing - it is welded to the pedal, and usually available as a complete reconditioned unit if required.
Noted and thanks. I need to take the whole cover off anyway as there is other work to do.

Re: Pedal pivot woes.

Posted: Wed Jul 03, 2019 7:42 pm
by newagetraveller
As far as I remember you have to take the gearbox out in order to remove the shaft.

Re: Pedal pivot woes.

Posted: Thu Jul 04, 2019 8:29 am
by simmitc
Thankfully not necessary to copletely remove the box. With the linkage disconnected, it is usually possible to wiggle the clutch pedal out. Worst case, support the box on a jack, remove the cross member, and then lower the box a little and push it to one side. It remains attached ot the engine, and there is sufficient play in the front mounts to allow the required movement. You may need to disconnect the engine steady bar. It's easier with the box out, but not essential, and a lot less work to leave it in!

Re: Pedal pivot woes.

Posted: Thu Jul 04, 2019 10:02 pm
by BrianHawley
simmitc wrote:
Thu Jul 04, 2019 8:29 am
Thankfully not necessary to copletely remove the box. With the linkage disconnected, it is usually possible to wiggle the clutch pedal out. Worst case, support the box on a jack, remove the cross member, and then lower the box a little and push it to one side. It remains attached ot the engine, and there is sufficient play in the front mounts to allow the required movement. You may need to disconnect the engine steady bar. It's easier with the box out, but not essential, and a lot less work to leave it in!
May be a bit different for me as I have a Toyota Celica gearbox.