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Brake Help Needed

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05 Sep 2016 18:58 #1 by Lang
Lang created the topic: Brake Help Needed
We are on our way in #200 to Gove and have developed a brake problem,

Feels normal at high speed gentle braking for corners and gentle pull up for a stop.

Got caught at lights in Emerald and right front locked with others seemingly not doing anything, slid gracefully through the lights leaving a black mark and smoke.


An hour later did a high speed stop to avoid an echidna cruising across the road. Same lock up but being higher speed the rear started to come around apparently not being braked (at least evenly). Frightened the s..t out of Bev and the echidna,

Any experiences of similar. I have a set of pads with me.

Lang I don't get online every day but would like to avoid going to Mount Isa brake people and head straight to Gregory Downs so a call would be great if any suggestions. 0439 677279

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05 Sep 2016 19:24 - 06 Sep 2016 06:22 #2 by Outback Jack
Outback Jack replied the topic: Brake Help Needed
I am in Darwin, I know its a long way away. But if you need anything, give me a hollow and I will help if I can.

Have you checked brake fluid etc? Seems like be a Master Cylinder problem or sticky caliper, but others with far more experience than me will have more clues. I think for memory the Master Cylinder is split, so one does halve of the system and the other does the other halve.
Last Edit: 06 Sep 2016 06:22 by Outback Jack. Reason: spelling

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05 Sep 2016 19:34 #3 by Joseph Baz
Joseph Baz replied the topic: Brake Help Needed
Hi Lang,
It's not unusual to have seized or sticky-stiff caliper pistons and the free one does most of the work,or does the work first,I'm not saying this is the problem but certainly it will be the first thing I will look at,it's not uncommon with vehicles that seat for a while,open the bleeder and force the piston back that should give you an indication of how free the pistons are,if there is rust spots around the piston you can expect a slight fluid leak in the near future as the pitted chrome damages the seal,hopefully is nothing grave
Let us know how you progress
Cheers,Joe

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05 Sep 2016 19:48 #4 by Dave and Pauline Gray
Dave and Pauline Gray replied the topic: Brake Help Needed
Lang
I would check the load sensing valve on the back axle that could be sticking if its in the no load setting all the braking force is transferred to the front and could be grabbing more on one brake.

Cheers Dave

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05 Sep 2016 22:38 - 05 Sep 2016 22:50 #5 by dandjcr
dandjcr replied the topic: Brake Help Needed
Lang, if the right front locks up, the left front may not be working. Stuck cylinders as Joe suggests or brake fluid on the pads.

If the pads are worn, the piston may run out of operating room or on to a rusty ledge. Push back the piston, remove the caliper and fit a thicker pad or as a temporary measure insert a steel packing piece between the piston and pad.





Oil on the rear pads from a leaking hub oil seal will also stop them working but it could also be the rear proportioning valve as Dave mentioned. Check the chain holding the adjuster, it could be broken or caught up preventing the rear brakes from working effectively. No chain should give maximum rear brake operation (adjuster sprung fully upwards).



David

David and Janet Ribbans - Oka 148
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Last Edit: 05 Sep 2016 22:50 by dandjcr.
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06 Sep 2016 05:54 #6 by ABE
ABE replied the topic: Brake Help Needed
Hi ,
I rang him last night and explained the same as Joe did, hopefully he is sorted by now as he has a new set of pads and his are 75% worn on front so was going to change. Been sitting for 10 years.
Regards ABE Tony

ABE Tony

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06 Sep 2016 06:11 #7 by dandjcr
dandjcr replied the topic: Brake Help Needed
Yes, I spoke with Lang this morning, he's heading for Longreach and will check/free up the front pistons and fit new pads there and check the rear valve operation.

All now in hand.

David

David and Janet Ribbans - Oka 148
Oka148 profile here.
Visit our technical and travel blogs: here.

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06 Sep 2016 09:10 #8 by Lang
Lang replied the topic: Brake Help Needed
Thanks team for all the info and phone calls. Currently in Longreach after getting extra supplies and "brake" tools. Will cruise up to Muttaburra and attack the wheels this afternoon.

I think the stuck pistons are the reason as I did a series of max brake pressure stomps this morning and the right wheel is locking only at the very extreme pedal push as opposed to just firm yesterday - seems more free.

Thanks again

Lang

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12 Sep 2016 08:50 #9 by Lang
Lang replied the topic: Brake Help Needed
Finally got time to look at the brakes at King Ash Bay north of Borroloola.

As predicted the left piston was completely rusted solid. A bit of emery paper and WD40 soon had it (roughly) smooth again and we now have 4 wheel brakes.

Thanks for the help from all who got back to me.

Lang
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12 Sep 2016 12:52 #10 by 210greg
210greg replied the topic: Brake Help Needed
Very nice spot up there. How's the fishing (Very Jealous)

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12 Sep 2016 18:55 #11 by Lang
Lang replied the topic: Brake Help Needed
Lorrela Springs was even better. I am going back in Easter next year after the wet as the place is just fantastic. 1,000km of 4wd tracks, hundreds of kilometres of creeks and rivers and 50km of totally deserted gulf beaches all on one property! Only about 100km north of Borroloola on the Roper Bar road.

Buggered two Bridgestone 285/75-16 tyres with rocks through the centre of the tread on pretty ordinary but not exceptionally bad gravel road.

Highlight of today was going over a small shady creek with about 100mm of water over the road and finding a 3 metre croc sitting with his chin on the crossing just after I commented to Bev it looked like a good spot for a swim!
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13 Sep 2016 03:48 #12 by Tony Lee
Tony Lee replied the topic: Brake Help Needed
Just out of interesr. Were you running with reduced tyre pressures when you had the stone oroblem?

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13 Sep 2016 06:17 - 13 Sep 2016 06:37 #13 by dandjcr
dandjcr replied the topic: Brake Help Needed

Lang wrote: Lorrela Springs was even better. I am going back in Easter next year after the wet as the place is just fantastic. 1,000km of 4wd tracks, hundreds of kilometres of creeks and rivers and 50km of totally deserted gulf beaches all on one property! Only about 100km north of Borroloola on the Roper Bar road.


Been through the Limmen NP a few times, some magical places there and along the Roper River (eg, Lost City, St Vidgeons Lake), but never Lorrella Springs , yet.

Looks like a must do on our next trip across the top from Normanton, better, cheaper and less commercialised than El Questro.

Glad your brake problems have been fixed.

David

St Vidgeons camping:




David and Janet Ribbans - Oka 148
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Visit our technical and travel blogs: here.
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Last Edit: 13 Sep 2016 06:37 by dandjcr.
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13 Sep 2016 17:02 #14 by Lang
Lang replied the topic: Brake Help Needed
David

Well worth the trip I would say.

Tony

I have been running 50psi on the tar and reduced to 40 on the gravel. Didn't want to go lower because it is really hot and the endless corrugations add to this (tyres had built up from 40 to 50 after 100km on the gravel). I have now a variety of 126 rated tyres - 2 Bridgestones left on the front, A toyo and a Hercules USA on the back with a Cooper as spare. I have had nothing but tears from Coopers so it will remain as spare only.

Lang

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