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Author: Subject: HELP diff seems to seize a little
Jamster1233

posted on 11/5/14 at 06:44 PM Reply With Quote
HELP diff seems to seize a little

my diff is very nice and smooth and easily pushed my hand when moving the kit car however after a hard run it seems to start "seizing " if you like like you leave the handbrake on a little its not bad bad but it is certainly noticable what is this ?
is it the diff ? oil in it low ?
or am i looking at a different problem as after i cant push the kit car backwards (bike engine) but after 15-20mins its fine you can push it with one finger :-/

thanks to anyone who can help me

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adithorp

posted on 11/5/14 at 07:00 PM Reply With Quote
Are you sure it's the diff and not the brakes?





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Jamster1233

posted on 11/5/14 at 07:05 PM Reply With Quote
im not sure its the diff but i wondered how would the brakes tighten up after hard run ??
then leave it 15mins after driving and then it back to normal light as a feather

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rusty nuts

posted on 11/5/14 at 07:10 PM Reply With Quote
Another vote for brakes binding, if you do a search it's been covered loads of times
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adithorp

posted on 11/5/14 at 07:10 PM Reply With Quote
If you don't have enough free play in the master cylinder push rod then the piston won't return far enough to uncover the reservoir port and the brakes will be held on. If it's the brakes they'll be warm, once they cool they'll free off.





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Jamster1233

posted on 11/5/14 at 07:15 PM Reply With Quote
ok sounds interesting i will look in to that
if it is the brakes whats best to do to overcome the problem ?
how do i stop them from binding


thanks guys for taking the time to talk :-)

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adithorp

posted on 11/5/14 at 07:32 PM Reply With Quote
Make sure there's some play in the master cylinder push rod and if there isn't adjust it.





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Jamster1233

posted on 11/5/14 at 08:03 PM Reply With Quote
shall i check that whilst the car is cold or after a run ?
thank you

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adithorp

posted on 11/5/14 at 08:14 PM Reply With Quote
Doesn't matter. just make sure it has a bit of play.





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Jamster1233

posted on 11/5/14 at 08:19 PM Reply With Quote
yes it feels like is has a little play !!
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austin man

posted on 11/5/14 at 09:26 PM Reply With Quote
handbrake adjustment too, sounds to me like the brakes are binding back the handbrake off a little too





Life is like a bowl of fruit, funny how all the weird looking ones are left alone

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loggyboy

posted on 11/5/14 at 09:27 PM Reply With Quote
Check it again after a run. Might just need a mm more.





Mistral Motorsport

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madteg

posted on 11/5/14 at 09:27 PM Reply With Quote
Small hole at the bottom of the master cylinder under the reservoir partially blocked, so brake fluid cannot return freely. This will hold the rear brakes on until fluid has returned to reservoir.
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Jamster1233

posted on 13/5/14 at 10:05 PM Reply With Quote
hi guys well found problem
basically once you apply the footbrake and release your foot off it it doesnt seem to fully retract right out it seems the weight of the pedal just holds a little preasure on the brakes
but if you reach down and pull the brake back with your hand the car moves freely again
what can i do to resolve this ? is it a new brake cylinder or spring behind pedal ?

many thanks guys

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matt_gsxr

posted on 13/5/14 at 10:19 PM Reply With Quote
lots of cars have brake pedal return springs.





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AdrianH

posted on 13/5/14 at 10:22 PM Reply With Quote
Check there is nothing binding on the pivot or bearing or what ever is used for the pedal.

Every now and then I get grit in the delrin that I have used as a bearing and it stops the pedal from moving freely. Clean it out and the pedal once again becomes free.

A small spring may not hurt but check everything else first.

Adrian





Why do I have to make the tools to finish the job? More time then money.

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