JT Outfitters Disc Brake conversion (1 Viewer)

[Austin74Lee90]

I'm doin a disc brake conversion all the way around my 74 FJ40. I got the front driver side done everything spun freely till I put the stock wheel back on. It will not turn. I grinded down the caliper put 1/4" wheel spacers and still won't turn. I'm thinking it's something with the brake pads where they haven't been plumbed or bled yet. Any others this happen to?

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[SouthBostonFJ40]

Do you have welded or riveted rims? If they're riveted, the rivet heads will interfere with the discs. Toyota still sells FJ40 steel wheels if you need them.

 

[bikersmurf]

Does it turn if you use lug nuts to hold the disc to the hub?

Sounds like rim interference with Calipers.

Have you changed masters? Removed residual valves from stock one?

 

[Austin74Lee90]

I have. I've grinded down the calipers the hub spins fine without the wheel on. Even with the wheel on it spins until I tighten it down. I even have a 1/4" spacer in there and still not getting free spin.


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[Austin74Lee90]

Do you have welded or riveted rims? If they're riveted, the rivet heads will interfere with the discs. Toyota still sells FJ40 steel wheels if you need them.

I want to say that they are welded.


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[SouthBostonFJ40]

I want to say that they are welded.


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Take a look and let us know. A 74 would have riveted rims.

 

[JohnnyC]

a 74 will have welded rims

AFAIK the change over was in the 74' model year.... rivited to welded rims

 

[SouthBostonFJ40]

a 74 will have welded rims

AFAIK the change over was in the 74' model year.... rivited to welded rims

My mistake, I assumed it was 76 when disc brakes were introduced.

 

[Austin74Lee90]

Yeah it's welded. I got it to turn it's not easy but it's where the pads already are in contact with rotor once I get em plumbed and bled it should work fine! I'll keep y'all posted


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[JohnnyC]

Maybe the piston wasn't fully depressed in?

My father had an issue with his pads being too thick and he wasn't able to get his over the rotor... Tried a generic brand (chepo set) and slid right in

 

[bikersmurf]

If they're still dragging after they're bled, I'd file/grind the pads down a bit to ensure you don't overheat the rotors or glaze the pads while wearing them down a bit.

 

[dopypuppy]

Had a similar problem. Ended up because of the wrong sunrasia rims. Petrol rims or something. Don't think this helps you but may help some one else.

 

[Austin74Lee90]

If they're still dragging after they're bled, I'd file/grind the pads down a bit to ensure you don't overheat the rotors or glaze the pads while wearing them down a bit.

Hopefully the caliper will position itself better on the sliding pins and allow for it to fix itself. (Fingers crossed)


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[Austin74Lee90]

Hopefully the caliper will position itself better on the sliding pins and allow for it to fix itself. (Fingers crossed)


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That's what I'm hoping for but I did the right the same way and it was fine it is just the left. I did hit the hub a bit too hard to seat it into the housing..... Oops


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[Poser]

a 74 will have welded rims

AFAIK the change over was in the 74' model year.... rivited to welded rims

Any lit or documentation backing this?

I have owned 1974 and 1975 trucks with hub caps and riveted wheels...

 

[JohnnyC]

The original spare rim I have with my truck... It is welded... It is stamped 11/74

There has been two other 74's earlier than mine that also had welded... There's were stamped same build month as their truck... Just as my build date is 11/74

I believe I had checked 2pdf's

Cruiserbrett? I think has a stamped set

 

[JohnnyC]

60030 is the rivited till 9/73

60080 like my welded rim from my 74 .... 9/73-9/75
super to 60081 9/75-8/77
super to 60082 8/77-7/80

 

[JohnnyC]

welded 1974 rim... works with discs

 

[Austin74Lee90]

They are definitely welded.


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[Fast Eddy]

This thread should be in the FAQ under why not to buy JTO disc conversion kits.