Overfilled brake fluid

Submitted: Sunday, Feb 22, 2009 at 19:58
ThreadID: 66202 Views:2512 Replies:5 FollowUps:3
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Just had my 100 Series serviced and 50 kms later rear brake cylinder leaking badly. Noticed even after loss of lots of fluid the level is still way over max. Can overfilling blow the seal?
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Reply By: Member - Barnray (NSW) - Sunday, Feb 22, 2009 at 20:13

Sunday, Feb 22, 2009 at 20:13
NO. Barnray
AnswerID: 350477

Reply By: donks1 - Sunday, Feb 22, 2009 at 20:14

Sunday, Feb 22, 2009 at 20:14
No. Overfilling won't cause it to leak

What is more likely is that when the cylinders were checked, they have disturbed the seals. It can happen very easily. Peal back the dust boot, see if they are wet, adjust the shoes and all seems fine. The simple act of checking can cause the problem.
Inside the cylinder wil get a slight ring of rust build up. When the shoes are adjusted the pistons now move further out of the bore, contacts the rust ring, and splits the seal.


Donks1
AnswerID: 350479

Reply By: Member - Graham H (QLD) - Sunday, Feb 22, 2009 at 20:40

Sunday, Feb 22, 2009 at 20:40
From what I can make out the correct way to check brake fluid level is turn the motor off and pump the brake pedal about 20 times then check it. It will then be down at what they say is the correct level.
Under normal use it always appears over full.



AnswerID: 350488

Follow Up By: The Yeti - Sunday, Feb 22, 2009 at 21:00

Sunday, Feb 22, 2009 at 21:00
thanks all, was just a thought, they have a new apprentice, I should be used to needing a bottomless wallet owning and using a 4wd
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FollowupID: 618794

Follow Up By: Member - Graham H (QLD) - Sunday, Feb 22, 2009 at 21:42

Sunday, Feb 22, 2009 at 21:42
Just to make you feel better my 80k check cost $912
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FollowupID: 618804

Reply By: donk - Sunday, Feb 22, 2009 at 21:08

Sunday, Feb 22, 2009 at 21:08
A australian spec 100 series will have disc brakes on the rear

Are you sure the rear caliper is leaking fluid or is the fluid you are seeing the result of someone replacing the brake fluid & not washing it down afterwards

The information posted earlier is relevent to drum brake rear end & this is applicable to a aust spec 100 series

Regards Don
AnswerID: 350493

Reply By: Member - Barnray (NSW) - Sunday, Feb 22, 2009 at 21:08

Sunday, Feb 22, 2009 at 21:08
Were any of the brake shoes or pads replaced.B
AnswerID: 350494

Follow Up By: The Yeti - Sunday, Feb 22, 2009 at 22:43

Sunday, Feb 22, 2009 at 22:43
Pads not changed but but I had a look and it is leaking from piston seal, just bloody coincidence I suppose
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FollowupID: 618816

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