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16 January 2008, 14:37
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#21
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Member
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 5,596
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Quote:
Originally Posted by codprawn
I have seen old trailers with solid rods operating the brakes - aren't these still used???
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Yep they are. I used rods on all three axles when I built my trailer. They are terminated with a short length of plain cable into the rear of the brake.
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JW.
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16 January 2008, 14:39
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#22
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Member
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 5,596
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Quote:
Originally Posted by yorfuoj
see pictures, easy and very efficient
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yorfuoj, it's not clear to see in your picture, have you a compensating mechanism in order to ensure both brakes are applied equally?
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JW.
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16 January 2008, 16:56
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#23
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Member
Country: France
Town: Cannes
Boat name: midkat 550
Make: apoge
Length: 5m +
Engine: 2x50 Tohatsu
Join Date: Jan 2008
Posts: 126
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brakes
yes, I kept the original compensating system.
There is a balancing bracket attached to the main rod (coming from the main coupler), on a knee joint, the cables are fixed each side of it, so if a brake shoe became worn before the other, the cable length is compensated.
In addition, each cable has its own threaded end to adjust at rest, see picture.
But most - if not all - trailers are made this way.
Another solution was to make the system without cable, just rods and levers. I started with this first idea, then I prefered the cable.
Reason : if the cable hit something on the road, it will absorb better the impact than a rod, which would remain bent and actuate one brake up to destruction.
And I found the cable easier to build, it was done in 3 hours.
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16 January 2008, 19:48
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#24
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Member
Country: UK - England
Town: Essex
Boat name: Crooked Bow
Make: Zodiac Pro Open 550
Length: 5m +
Engine: Evinrude etec 115
Join Date: Jan 2007
Posts: 36
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Pete - I fully appreciate the upside to the likes of Knott/Avonride.....but personally I would pay extra and avoid the hassle. Avoiding a weekend messing around with brakes, cables and hubs in my opinion has to be worth £400.00 - in fact it has to be worth a grand on the new price!
Just invested in a hub flush kit - fingers crossed!
Quote:
Originally Posted by Pete7
Dave your missing the point, its very profitable to sell new parts for trailers every year why would you make something that doesn't wear out or sieze. You could have stainless steel brake components but if it added £400 to the cost of the trailer which one would people buy?
Pete
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Dave; Essex
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17 January 2008, 10:09
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#25
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Member
Country: UK - England
Town: Salcombe, Devon, UK
Boat name: BananaShark
Make: BananaShark
Length: 10m +
Engine: 2xYanmar 260 diesels
Join Date: Mar 2003
Posts: 4,225
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Personally I think Stainless disc brakes are the way to go, and if you convert to open cables it's just the bearings to worry about!
Not sure if discs are ok in Europe yet, but I think they run them in the States?
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Cookee
Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
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17 January 2008, 11:42
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#26
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Member
Country: Other
Town: San Carlos, Mexico
Boat name: INDE
Make: LOMAC 730
Length: 7m +
Engine: 200 Merc.
MMSI: Please press 1
Join Date: May 2006
Posts: 1,688
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Quote:
Originally Posted by Cookee
Personally I think Stainless disc brakes are the way to go, and if you convert to open cables it's just the bearings to worry about!
Not sure if discs are ok in Europe yet, but I think they run them in the States?
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Have done quite a bit of reseach on the preferences in the USA. Firstly cable brakes are hardly ever used. Hydraulic surge brakes are the preference as are disk brakes and the top of the line disks are a stainless/bronze alloy.
Don't know the cost yet. I have had the hydraulic set up and it works very well; virtually maintenance free. Just check the fluid level in the master cylinder once a year.
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Running around like a head with it's chicken cut off.
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17 January 2008, 12:24
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#27
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Member
Country: UK - Scotland
Town: Aberdeenshire
Boat name: Kikican
Make: Vipermax 7
Length: 7m +
Engine: F250 / FT9.9 Aux
Join Date: Nov 2006
Posts: 250
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Disc Brakes
My new Dixon-Bate trailer has disc brakes. They look the biz. Calipers are big and chunky. Wheel off, undo two bolts and one clip and the caliper is on the bench. Caliper could be stainless but not sure yet. Clearances between moving parts are large so much less chance of it seazing. I stripped and greased them just in case though.
Best bit is that you can remove the brakes without disturbing the bearing. Keeps the rust out of the bearing.
Also the cables are much larger diameter than the normal "caravan" type bowden cr@p. The inner cable looks like stainless coated with plastic (like throttle cables) - they run very free and look like they will need no lubrication. Probably no real need for hydraulics with this type of cable.
Discs are normal steel type - not sure stainless discs would be ideal - might warp more easily. Not sure that stainless is necessary - the discs are so exposed that cleaning them is dead easy. Any salt water will be centrifuged off or taken off by the pads.
The braking power is immense. Really feel a strong but smooth braking action.
Richard
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17 January 2008, 12:52
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#28
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Member
Country: Other
Town: Principalite d'Chaos
Boat name: The Nashers Revenge!
Make: Windsor Brothers
Length: 6m +
Engine: Optimax 225
MMSI: "Mmmmm SI" she said!
Join Date: Jan 2004
Posts: 4,920
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I've looked into Disc brakes quite a bit, but haven't found any that meet current UK Auto reverse legislation.
Richard
What mechanism does your trailer have for auto reverse? Assuming its legal of course.
Nasher.
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17 January 2008, 14:28
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#29
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Member
Country: UK - Scotland
Town: Aberdeenshire
Boat name: Kikican
Make: Vipermax 7
Length: 7m +
Engine: F250 / FT9.9 Aux
Join Date: Nov 2006
Posts: 250
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The inner pad is mounted on an eccentric swivel. When the coupling is pushed in when reversing the brake applies as normal but the rotation of the disc causes the inner pad to swing backwards and away from the disc, releasing the pressure. The outer pad floats with the caliper. When the cable tension is released, the return spring pulls the inner pad forward and outwards, and back into its original position. The return spring is pretty heafty.
The coupling is more complex and has a "Reverse Action Lever" not sure what part this plays but will find out at the weekend.
The pins that hold this mechanism may be a source of trouble if not greased now and then however it only takes a few minutes to strip the whole thing down and you don't have to go anywhere near the bearing. The pins are held in place with quick release clips. They will probaly corrode so will get a stock of these.
You can feel the brake applying and then releasing more than with drum brakes.
Richard
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17 January 2008, 21:01
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#30
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Member
Country: UK - England
Town: Essex
Boat name: Crooked Bow
Make: Zodiac Pro Open 550
Length: 5m +
Engine: Evinrude etec 115
Join Date: Jan 2007
Posts: 36
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Richard,
This sounds like a significant improvement - not sure why this is not offered as an option on all trailers - some customers would willingly pay more this upgrade. As per usual, the americans appear well ahead of us on this!!
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Dave; Essex
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17 January 2008, 22:18
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#31
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Member
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
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Quote:
Originally Posted by Daveboy 71
Richard,
This sounds like a significant improvement - not sure why this is not offered as an option on all trailers - some customers would willingly pay more this upgrade. As per usual, the americans appear well ahead of us on this!!
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Why as per usual? Their cars leave a lot to be desired.............
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17 January 2008, 22:44
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#32
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Member
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 5,596
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Quote:
Originally Posted by Richard Selman
The inner pad is mounted on an eccentric swivel. When the coupling is pushed in when reversing the brake applies as normal but the rotation of the disc causes the inner pad to swing backwards and away from the disc, releasing the pressure. The outer pad floats with the caliper.
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Richard, from your description is sounds as though the trailer hand brake will not work if the trailer is disconnected from the car with it's stern facing down hill.
Quote:
The coupling is more complex and has a "Reverse Action Lever" not sure what part this plays but will find out at the weekend.
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Maybe this device is the fix for it. Would you report back please after you've sussed it and dunked it into salt water a few times? Ta.
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JW.
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17 January 2008, 22:45
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#33
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Member
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 5,596
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Quote:
Originally Posted by codprawn
Why as per usual? Their cars leave a lot to be desired.............
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Fekoff.
__________________
JW.
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17 January 2008, 22:56
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#34
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Member
Country: Other
Town: San Carlos, Mexico
Boat name: INDE
Make: LOMAC 730
Length: 7m +
Engine: 200 Merc.
MMSI: Please press 1
Join Date: May 2006
Posts: 1,688
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Quote:
Originally Posted by jwalker
Fekoff.
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DITTO
__________________
Running around like a head with it's chicken cut off.
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17 January 2008, 23:17
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#35
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Member
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
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Whoops sorry I forgot some people still like leaf springs..............
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17 January 2008, 23:48
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#36
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Member
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 5,596
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Quote:
Originally Posted by codprawn
Whoops sorry I forgot some people still like leaf springs..............
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Fekoff.
__________________
JW.
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18 January 2008, 03:55
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#37
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Member
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
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Isn't that the noise Yank cars make when they come to a corner???
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18 January 2008, 10:32
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#38
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Member
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 5,596
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Now you're just being naughty.
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JW.
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