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Trailer brakes

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Just sorting a trailer for my dad and it has an old disc brake setup on it. It looks like I'll be replacing the calipers as they are fucked, I assume they are Trojan mk2's but have a question, everyone seems to refer to the mk2s as having a 100mm mount but I measure 102ish on the trailer (which is close to 4"), is it just a way of differentiating them and not actually 100mm? The other mount is referred to as 90mm and I'm wondering if it is actually 88.9mm (which would be 3.5").

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Definitely Trojan calipers and as mentioned, bolt hole spacing is around 102mm/4"
I asked a person selling Mk2 calipers and they seemed sure they were 100mm spacing but I didn't think 70's NZ was very metric so still not sure 


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Just looking at the pads that came out and they look like the Mk1 pads (square) so maybe that's what they are.

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should be easy enough to re-kit them, as they will be a generic piston/seal

i'd be more concerned about the wheel bearings, as the Trojan ones on my trailer were MK2? Zepher and were over $400 per hub to replace, if they were obtainable

 

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Yeah, can still get pads and seals from manufacturer but would have to hunt out some pistons as they seem to be no longer available.
Bearings are easy, they are common ones thankfully.
 

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Sorry to Hi Jack this, I have the MK 2 calipers on my caravan, are new discs available, the VTNZ WOF guy got excited about the minor pitting on the disc face.

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You can get new discs, I assume you have the single unit hub and disc setup? The disc surface of the new zinc plated cast iron ones is a bit rough, probably worse than your pitted OG items :)

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Disks are available last time I checked, single piece hub and disk.

Heat dissipation from disk to hub is what stuffs the bearings, be sure to put a bead of sealant around the dust cap too as it will pull the moisture in from this side first turning the grease milky.

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Take them in to CDL’s work and they will tell you everything you need to know. They probably have some NOS pistons tucked up on the top shelf of the smoko room.

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On 10/10/2018 at 19:15, Get it done said:

Disks are available last time I checked, single piece hub and disk.

Heat dissipation from disk to hub is what stuffs the bearings, be sure to put a bead of sealant around the dust cap too as it will pull the moisture in from this side first turning the grease milky.

Yes they are the single piece ones. The don't look to different to some old LH torana ones I have lying around.

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