Electric park brake

[Lukeis]

This has only happened twice but today when getting out of the car and apply the EPB it made a very loud squeaky/scratchy noise which went for a few seconds

Any ideas what has happened or causing this??

[scarry]

There are heaps of threads on this.
The EPB needs a good clean and adjustment,it should be done regularly at each service or so.
There are also vids on U tube how to do it.
i have never done it so sorry can't help

[vee8auto]

the park brake shoes are inside the rear brake disc. As the brake shoes wear the EPB actuator has to pull further to apply the brake. You are now hearing it get to the end of its travel, and the risk of jamming increases.

You now need to familiarise yourself with the procedure to manually disconnect the park brake actuator. Also note that when the car is in low range the EPB pulls itself on harder. So it is most likely going to cause it to jam if you apply the EPB in low range.

The park brake shoes may still have enough material that an adjustment of the shoes will get you by for a while. Its garden variety brake shoe & drum set-up so any brake workshop can do it.

[loanrangie]

Curious but why does low range have anything to do with the epb ?

[vee8auto]

I recall reading it in Landrover info, and it made sense to me. If you are in low range its a fair assumption that you are on a steep slope, or other precarious position. So the park brake needs extra force to hold the car.

[DiscoJeffster]

I recall reading it in Landrover info, and it made sense to me. If you are in low range its a fair assumption that you are on a steep slope, or other precarious position. So the park brake needs extra force to hold the car.

Hill hold function, as you imply in the original post, is not a function of the handbrake. It is a function of the ABS / Traction system. It's far better to have four wheels braked holding your position than the two rear ones from the EPB. And no, it does not use the EPB unless you activate it yourself so none of these are related topics. This is obvious with a window open as you can clearly hear the EPB motor actuating which does not happen when hill hold/decent control is active.

That aside, the EPB of the OP sounds like it needs adjustment as has been stated.

[vee8auto]

No. I wasnt talking about or implying Hill hold function. I was specifically referring to the operation of the park brake when in low range and when the car is parked and unattended. That was my recollection of how the function was described, and the recollection doesnt include hill hold function.

I went through all this research when my car started doing the same thing...couple of warning screeches weeks apart.... emergency brake release on a remote coastal 4wd track... complete rebuild and adjustment of all park brake shoe / drum / disc assembly in my garage. So, yeah, been there done that so to speak.

However, I will have a look and see if I can find the info.

[vee8auto]

for starters:

"Hi All . A little advice please… My EPB has started screeching when applied in low gear. It only does this in low, in high it works just fine."

response: "The computer applies the park brake harder when in low range. If you can always remember to move to high before applying, it may live happily for a few more months."


http://www.disco3.co.uk/forum/topic150237.html

the work I did on my car predates this post but I recall seeing it in Landrover info, somewhere?

[scarry]

Ok,so how does the hill hold function work?

When is it activated?

[vee8auto]

Ok,so how does the hill hold function work?

When is it activated?

Dunno.... but this is now thread drift.

[scarry]

Thread drift,never happens.......[bighmmm]

But many seem to venture off topic,it is a public forum.

So if the 3.0 ton caravan is in tow,and need to leave vehicle on a steep slope,put in low range before putting on handbrake....?

Never heard of that before,but there is something to learn everyday

[DiscoJeffster]

for starters:

"Hi All . A little advice please… My EPB has started screeching when applied in low gear. It only does this in low, in high it works just fine."

response: "The computer applies the park brake harder when in low range. If you can always remember to move to high before applying, it may live happily for a few more months."


http://www.disco3.co.uk/forum/topic150237.html

the work I did on my car predates this post but I recall seeing it in Landrover info, somewhere?

So because someone with zero authority, like me, says it it's true it is? In the same respect I can't say it's not, but that sounds like someone reaching for an explanation rather than based on any fact. After all, the handbrake, when configured correctly will lock the back wheels to the point of skidding and dragging on bitumen so why would it need any further force? Locked is locked? Anyhow, moving on.

[vee8auto]

I love this forum. And the people you meet on it.

[Lukeis]

Thanks gents, will check the forum for adjustment instructions or watch the YouTube video as suggested.

Really appreciate the advice.

Let's leave it here.

[LRD414]

Bodsy's Brake Bible has good instructions for EPB adjustment and shoe change with bedding procedure if required. I printed a copy and had it at the car with me. It's not difficult but can be somewhat fiddly.

Scott

[RANDLOVER]

So it sounds like applying the E.P.B. while in Low Range might be a good early warning of potential failure. I'll try mine tonight although I did have mine serviced a while ago when I heard the dreaded screech, & it's been good since.

[Chops]

I cant give you any technical info, but the car certainly pulls up fast, straight and comes to a complete stop from 80Klms very aggressively when using the EPB only [biggrin]

[DiscoJeffster]

I cant give you any technical info, but the car certainly pulls up fast, straight and comes to a complete stop from 80Klms very aggressively when using the EPB only [biggrin]

If you are not in EPB bedding in procedure then pulling up the handbrake utilises the traction/ABS to slow you. Once you've done the EPB bedding in you can feel the difference between the two.

[Chops]

If you are not in EPB bedding in procedure then pulling up the handbrake utilises the traction/ABS to slow you. Once you've done the EPB bedding in you can feel the difference between the two.


Sorry Jeff (?),
Not quite sure what you mean by "bedding in procedure". We were on gravel, and I was just told to get up to 80clicks and just pull the handbrake on,,, no footbrake at all, and let it do its thing. Obviously the ABS came on to slow the car down,, very rapidly, then the handbrake came on at the end I guess. To then move away, I released the handbrake, and off we went.

[DiscoJeffster]

Sorry Jeff (?),
Not quite sure what you mean by "bedding in procedure". We were on gravel, and I was just told to get up to 80clicks and just pull the handbrake on,,, no footbrake at all, and let it do its thing. Obviously the ABS came on to slow the car down,, very rapidly, then the handbrake came on at the end I guess. To then move away, I released the handbrake, and off we went.

Yes. When you employ the handbrake button it uses the ABS system to slow you down. As you say, the handbrake will apply at the end of the event. The handbrake has not participated in the slowing of the vehicle, only the ABS. All the handbrake does is stop you moving once you've actually stopped.
What I meant was if you've ever performed a handbrake bed-in procedure you'll know the difference in feeling between the handbrake actually slowing you down versus the ABS system.
When you bed in the handbrake it disable the ABS function on the handbrake and applies the handbrake during forward motion when you pull it.

[Disco-tastic]

This has only happened twice but today when getting out of the car and apply the EPB it made a very loud squeaky/scratchy noise which went for a few seconds

Any ideas what has happened or causing this??As Scott has mentioned Bodsys Brake Bible is one of the best sources for all things brake related.

While it is a bit of work to remove the rear disks and give the park brake a clean, adjusting it only requires the removal of the rear wheels and a flat blade screwdriver. Takes about 10mins each side, including removal and replacement of wheel.

If you dont have the little rubber grommet that covers the adjuster hole, dust and muck can get in and if thats the case I'd recommend cleaning it properly.

I bought a couple of grommets from repco for about $5 and they do the job nicely. I forget the size but i think its 6 or 8mm (or maybe 1/4").

Ive had the EPB module jam before. It's a pain to release, I'd recommend adjusting it ASAP :)

[DiscoJeffster]

I found an early warning for me before the screeching was getting into the car the following morning and getting the EPB flashing error. I can't remember the exact error but the EPB would flash and I think the car bonged at you. Ever since adjusting it engages quicker and never errors.

[RANDLOVER]

Well I tried mine & it's quiet in High Range but makes a definite screech in Low Range, even after several tries, so I've asked my mechanic to adjust it next week, I hope that makes a difference.

[Lukeis]

As everyone predicted it jammed this weekend!!
I was planning on doing it but assumed I had longer, it only screached 3 times before the jam so it came quickly.

Thankfully the release cable works well and I've adjusted one side (did it too tight to be able to turn the other wheel) and it's all working again now. Will do the other side tomorrow

That bible is a great guide, thanks again all!

[loanrangie]

Not exactly on topic but when i collected my D3 from previous owner he showed me how to release the handbrake, now 6 weeks later it occurred to m that i have never seen the a telltale light on the dash to tell me that the handbrake is applied ?
I don't apply it as i had assume it was applied once i selected park but this may have been turned off in the settings, or have i got this wrong ?

[DiscoJeffster]

You have it wrong. It does not apply automatically. You must pull the lever to engage it. It's not a setting either as I understand it

[Lukeis]

How bizarre, I wonder if there is a specific fuse for it? What happens when you pull the lever, can you hear it apply the brake?

Alarm bells would have rung when the guy selling the car teaches you how to release it!

[letherm]

Not exactly on topic but when i collected my D3 from previous owner he showed me how to release the handbrake

He may have shown you how to do that in case of battery failure. From memory you can't release the handbrake without power unless you do this.

Martin

[DiscoJeffster]

I think loanrangie means that the seller showed him how to normally release it using the switch, not the emergency release. Loanrangie also says he's not seen the park brake symbol on the dash, which isn't a surprise as he also says he has never engaged it himself, thinking it would automatically apply. Now unless a D3 is different to a D4, mine doesn't automatically apply itself - I have to manually apply it, and then on comes the light.

[loanrangie]

I think loanrangie means that the seller showed him how to normally release it using the switch, not the emergency release. Loanrangie also says he's not seen the park brake symbol on the dash, which isn't a surprise as he also says he has never engaged it himself, thinking it would automatically apply. Now unless a D3 is different to a D4, mine doesn't automatically apply itself - I have to manually apply it, and then on comes the light.

Correct,not the release handle under the dash. Not tried to use it as i normally park on a level area of grass on front lawn or in the driveway.
So for the last 6 weeks i have been pressing that button for nothing :), oh well at least i wont wear it out.

[vee8auto]

Not exactly on topic but when i collected my D3 from previous owner he showed me how to release the handbrake, now 6 weeks later it occurred to m that i have never seen the a telltale light on the dash to tell me that the handbrake is applied ?
I don't apply it as i had assume it was applied once i selected park but this may have been turned off in the settings, or have i got this wrong ?

No, you haven't got it wrong, there is a setting in the CCF ( = Car Configuration Files ??) where it can be set to apply when you remove the car keys.

I thought I saw this the other day, so I just went and checked with the GAP IID Tool and there it is.

Lots of other interesting stuff too, I might add.

[DiscoJeffster]

Tell me if it actually works. CCF setting being available doesn't mean it works

[letherm]

I think loanrangie means that the seller showed him how to normally release it using the switch, not the emergency release. Loanrangie also says he's not seen the park brake symbol on the dash, which isn't a surprise as he also says he has never engaged it himself, thinking it would automatically apply. Now unless a D3 is different to a D4, mine doesn't automatically apply itself - I have to manually apply it, and then on comes the light.

So, 1 plus 1 can equal 3. [bigsmile1]

Sorry to mislead, thought you were talking about the situation I described.

Martin

[vee8auto]

Tell me if it actually works. CCF setting being available doesn't mean it works

true, because this function is only an option on manual models according to the land rover manuals. And I could see it on my car which is auto trans.

[RANDLOVER]

Well I tried mine & it's quiet in High Range but makes a definite screech in Low Range, even after several tries, so I've asked my mechanic to adjust it next week, I hope that makes a difference.

Update: The cleaning and adjusting didn't last long, as the hand brake started to not release properly, binding on the R.H. drum, caused a shudder while driving, so I had the whole mechanism replaced. It's very quiet now in both High & Low range. I still think there is a difference in tension/torque applied Hi vs Lo range as a few weeks after the new mechanism install, I noticed it scraping slightly while driving with the window down in a multi-storey car park, I stopped, put it in Low applied the EPB and the scraping hasn't re-appeared.