Two "diggers" crash in Scotland

[stevie boy]

No the brakes are air over fluid, if you loss the fluid you have no brakes

the ones we have would still work fine if you lost the oil, the air chamber pushes the retracted ram, just using it as a pushrod

 

[Speedstar]

Yes but trailers on air,well should be.

One thing from the crash pictures,he had the digger chained on well and a strap over the buckets.

when a brake disc breaks, there is no pedal and the trailer brakes would not work, Is a funny set up on a Fastrac how the air trailer brakes work.And I would say when the trailer came off the tractor after it jackknifed the trailer brakes have came on with the air lines breaking , or do you not think it would have been a greaterr distance between the tractor & trailer

 

[Speedstar]

the ones we have would still work fine if you lost the oil, the air chamber pushes the retracted ram, just using it as a pushrod

No it would not, oil pushes the pistons out to the pads & brakes on .

 

[stevie boy]

No it would not, oil pushes the pistons out to the pads & brakes on .

sorry dude i thought you were talking about the trailer side of things!

 

[miniconnect]

Something like what speedstar describes happened to a friend driving a fastrac a few years ago going down a steep hill, he was luck there was a forestry road at the bottom of the hill, it took a long time for it to run out i think.

 

[Blue.]

when a brake disc breaks, there is no pedal and the trailer brakes would not work, Is a funny set up on a Fastrac how the air trailer brakes work.And I would say when the trailer came off the tractor after it jackknifed the trailer brakes have came on with the air lines breaking , or do you not think it would have been a greaterr distance between the tractor & trailer

Yes,I think your right,they are very near.

Handbrake on tractor would have put brakes on,if thinking quick.


I've had air brakes on tractors for 6 maybe 7 years and never knew on my 7530 that the trailer hand brake only came on when you used the true ratchet handbrake till the other day.

 

[Jetemp]

.sorry @Speedstar but I believe that you are not quite correct. On all the fastracs that I have operated, from 185s, 3185s, 8250s 3200s 3230s, all have had 3 hydraulic brake systems, one system for the front axle one for the back and one for the trailer brake circuit, all independant of each other, and with separate brake fluid tanks. Snapping a disc or loosing all the brake fluid in one systems won't effect the other or give you no brake pedal. The brake pedal may feel different nut it would still work the othe circuits.

It would not pass construction and use requirements if it did as you were suggesting

James

 

[Speedstar]

This is the fastrac before the guy bought it doing this job

 

[Kevtherev]

Best not comment until the proper investigation comes up with the cause of it I reckon.

 

[Speedstar]

.sorry @Speedstar but I believe that you are not quite correct. On all the fastracs that I have operated, from 185s, 3185s, 8250s 3200s 3230s, all have had 3 hydraulic brake systems, one system for the front axle one for the back and one for the trailer brake circuit, all independant of each other, and with separate brake fluid tanks. Snapping a disc or loosing all the brake fluid in one systems won't effect the other or give you no brake pedal. The brake pedal may feel different nut it would still work the othe circuits.

It would not pass construction and use requirements if it did as you were suggesting

James

There is a four way Valve were they can cross feed ours empty all 3 of the fluid pots & had no brakes at all, did not have a trailer on at the time so can not say if the trailer brakes would work , but it had no pedal it hit the floor & that was it

 

[Hilly]

There is a four way Valve were they can cross feed ours empty all 3 of the fluid pots & had no brakes at all, did not have a trailer on at the time so can not say if the trailer brakes would work , but it had no pedal it hit the floor & that was it

Mine emptied 1 fluid res once for no apparent reason and no brakes on one wheel, filled it up and has been good for years, weird but what your saying makes sense to me after experiencing that.

 

[Jetemp]

http://www.jcb.com/products/EBrochures/45907_JCB_5496UK_1_3000/files/45907_jcb_5496uk-1-3000.pdf

Page 24 of brochure quite clearly tells you that the braking systems are split between front and rear axles for added safety.

I was looking for an online 'plumbing' diagram to show you this was the best I can do tonight I will did an old workshop manual out if I can find it tomorrow showing you the circuits completely independant @Speedstar, this is on the 3000 series might be different on the smaller models

 

[Zetor]

Do these fastracks not have a sensor in the brake reservoir?
Fendt dash lights up like a Christmas tree if the fluid is a little low.

 

[Speedstar]

http://www.jcb.com/products/EBrochures/45907_JCB_5496UK_1_3000/files/45907_jcb_5496uk-1-3000.pdf

Page 24 of brochure quite clearly tells you that the braking systems are split between front and rear axles for added safety.

I was looking for an online 'plumbing' diagram to show you this was the best I can do tonight I will did an old workshop manual out if I can find it tomorrow showing you the circuits completely independant @Speedstar, this is on the 3000 series might be different on the smaller models

Book can say what ever I know what ours did & it empty all 3 on ours & it had not brakes at all , was the Back right disc that snapped in 2, All so had some Valves in the braking system , that were not in the parts book, JCB are bad for changing things & not saying so

 

[Speedstar]

Do these fastracks not have a sensor in the brake reservoir?
Fendt dash lights up like a Christmas tree if the fluid is a little low.

Yes, but to late going down a hill with a broken disc pressing the brake pedal

 

[Jetemp]

@Speedstar I really don't want to argue with you but they wouldn't meet the relevant construction and use requirements if they did as you are saying.

 

[Speedstar]

@Speedstar I really don't want to argue with you but they wouldn't meet the relevant construction and use requirements if they did as you are saying.

There is nothing to say have you had that problem with a Fastrac ? ,As we had and I can tell you you are wrong, they can cross feed, having had a complete new brake system fitted to our fastrac & I mean every thing I know what I am talking about

 

[Jetemp]

Yep I'm not proud to say I have driven a fastrac with a circuit down due a leaking pipe, as advised at the time by jcb, all the other circuits worked perfectly. Having said that I never snapped a disc. At one point i was putting 2000 hours a year on a fastrac.

 

[Speedstar]

Yep I'm not proud to say I have driven a fastrac with a circuit down due a leaking pipe, as advised at the time by jcb, all the other circuits worked perfectly. Having said that I never snapped a disc. At one point i was putting 2000 hours a year on a fastrac.

A leaking pipe is not the same as a broken Disc it has 2 brake lines pumping fluid out as fast as you can pump the pedal with in seconds thats it not brakes

 

[Jetemp]

@Speedstar im not going to argue with you but as I said earlier the axles run independant circuits to meet construction and use requirements, just like a Land Rover does, if our old workshop manual hasn't been filed in the big round filing bin I'll dig the braking circuits out