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Old 15 April 2011, 12:54   #11
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Country: UK - Scotland
Town: Aberdeenshire
Boat name: Kikican
Make: Vipermax 7
Length: 7m +
Engine: F250 / FT9.9 Aux
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I've got discs on my double axle trailer. They get dunked once a month. Just did a complete stripdown and rebuild for the journey to Oban.

They are definately much better than drums IMO. The best bit is that you do not have to expose the bearing to work on the brakes. The problem is that the calipers cannot be completely dismantled and the auto reverse mechanism has a tendancy to stick. Club hammer seems to sort it.

Complete strip, grease (as best you can) and rebuild every 2 years seems to keep them working. Pads seem to be lasting. You can give them a good flush with a power hose from the opposite side of the boat.

Cable load adjusters all stuck this year. Replaced with polished stainless plates and stainless forks.

The belden cables are plastic coated and still run free.

Discs are lasting better than my pickup.

What we need are these:

http://www.trailerandtruckparts.com/...tern_p_61.html

Completely stainless less hydraulic brakes. Nice.

Richard
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Old 15 April 2011, 13:47   #12
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Country: UK - England
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Hmm dont remember ever seeing seled bearing in boat trailers they all seem to be roller bearings.
Even quite alot of cars have roller bearings as you can take up any sack by tightening the retaining nut .

like the disk breaks didnt think they were avaliable in the UK. ( are they legal ? )
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Old 15 April 2011, 15:21   #13
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I have been using ordinary grease, not marine grease, which probably didn't help and my wheels nearly always take a dunk when launching, I think the best way to get longer life out of the bearings is to try and grease them up on the same day after use, instead of a few days after, which probably helped to shorten the life of the bearings.

Would it be okay to pump marine grease into ordinary grease to save me stripping and cleaning them again ??
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Old 15 April 2011, 16:06   #14
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Country: UK - N Ireland
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Quote:
Originally Posted by kerny View Post
I have been using ordinary grease, not marine grease, which probably didn't help and my wheels nearly always take a dunk when launching, I think the best way to get longer life out of the bearings is to try and grease them up on the same day after use, instead of a few days after, which probably helped to shorten the life of the bearings.

Would it be okay to pump marine grease into ordinary grease to save me stripping and cleaning them again ??
I would say "yes"......for the last 15 years I have been using JCB grease & some times "topped up" with other grease.......mostly freshwater use, but as said before 1000 miles + a year, pump in grease drive out the water.........
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Old 15 April 2011, 16:57   #15
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buying good grease is money well spent. pack the hubs full and keep them full with the spring loaded bearing protectors.
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Old 16 April 2011, 07:56   #16
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Engine: Etec 150
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Hmm dont remember ever seeing seled bearing in boat trailers they all seem to be roller bearings.

SBS trailers have sealed bearings, that's what mine is and as they claim to be "probably the largest UK manufacturer" I should think there are quite a few around

According to website: "Fitted with torsion beam axles and sealed for life bearings. We have been fitting this type of bearing for over a decade and on balance they are 5 times better than traditional taper roller bearings."

I'd prefer maintainable bearings but they have built a lot more trailers than I have and presumably choose their parts based on experience, the important thing from my side is that the wheels stay on
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Old 17 April 2011, 13:47   #17
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Would it be okay to pump marine grease into ordinary grease to save me stripping and cleaning them again ??
Has more to do with the base that the grease is on. Most of the off the shelf greases are a lithium base, and nearly all of these can be mixed without a problem. There are, however, a few aluminum complex based greases around, which are supposedly better at water resistance, but completely incompatible with lithium based greases. Not sure exactly what the problem is when mixing them.

http://www.finalube.com/reference_ma...lity_chart.htm

jky
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Old 19 April 2011, 13:15   #18
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Thanks everyone, From now on, I will take the grease gun with me and give the bearings a good old greasing, after being dipped in the salty stuff.
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