Page 2 of 3

Re: front brake upgrade: semi-huck to duo-servo

Posted: Sun Mar 09, 2025 4:06 pm
by Blacky
Today is brake day - first problem the new slave cylinders don’t fit the same as the originals :evil: so had to take the die grinder to the freshly powder coated backing plates :? :evil: :evil: :evil: :evil:
Image


Sent from my iPhone using Tapatalk

Re: front brake upgrade: semi-huck to duo-servo

Posted: Sun Mar 09, 2025 5:53 pm
by Blacky
Don’t like the look of this one bit - look at the angle the pushrods are on
Image

Bit different to the old brakes -
Image


Sent from my iPhone using Tapatalk

Re: front brake upgrade: semi-huck to duo-servo

Posted: Sun Mar 09, 2025 6:37 pm
by Errol62
Way too much thread showing on the adjuster at the bottom too, indicating they should be sitting quite a bit further away from the top pivot pin. I’ve got some original bits here I can photograph somewhere, albeit balljoint front and wider commercial rear. I think the rears may have been modified to fit disc front compatible rear wheel cylinders.


FB ute fixer upper, EK van on rotisserie

Re: front brake upgrade: semi-huck to duo-servo

Posted: Sun Mar 09, 2025 6:44 pm
by Errol62
Ahh, but you haven’t got the drums on yet?


FB ute fixer upper, EK van on rotisserie

Re: front brake upgrade: semi-huck to duo-servo

Posted: Sun Mar 09, 2025 9:44 pm
by Blacky
Correct - adjusters weren’t adjusted, wound them in to fit the drums
Also noticed after taking that pic that I had fitted the shoes arse about on the left side Image
Image

Fixed, then installed the drivers side and found the new slave cylinders have a different thread to the FB style slaves Image
Image

New brake lines and tie rod ends tomorrow and hopefully that will be job done
Image
Drivers side done, passenger side is coming for a ride down the hill tomorrow as a sample for the new brake lines


Sent from my iPhone using Tapatalk

Re: front brake upgrade: semi-huck to duo-servo

Posted: Mon Mar 10, 2025 11:45 am
by EK283
It does make me laugh, those $120 dollar slave cylinders looking pretty good about now !
The hoses are a bugger as well.

Greg

Re: front brake upgrade: semi-huck to duo-servo

Posted: Mon Mar 10, 2025 1:05 pm
by Errol62
I reckon it will be worth it. Even better with the wider HD kingpin ones.


Sent from my iPhone using Tapatalk

Re: front brake upgrade: semi-huck to duo-servo

Posted: Mon Mar 10, 2025 1:16 pm
by Blacky
Errol62 wrote: Mon Mar 10, 2025 1:05 pm I reckon it will be worth it. Even better with the wider HD kingpin ones.


I tried to find HD kingpin stuff but its unobtanium , don't know how you would go buying new drums or other bits either ......

Re: front brake upgrade: semi-huck to duo-servo

Posted: Mon Mar 10, 2025 4:53 pm
by Errol62
They don’t make the wider drums it seems so yes.


Sent from my iPhone using Tapatalk

Re: front brake upgrade: semi-huck to duo-servo

Posted: Mon Mar 10, 2025 6:46 pm
by Blacky
Errol62 wrote: Mon Mar 10, 2025 4:53 pm They don’t make the wider drums it seems so yes.


Wasn't sure if the drums would interchange with the HR and onwards drums - a master parts cattledog might clear it up but it's all academic anyway

Re: front brake upgrade: semi-huck to duo-servo

Posted: Mon Mar 10, 2025 7:05 pm
by Errol62
I think the KTG drums are bigger diameter and Torana are different offset. FB to EH and HD HR rear get a gurnsey. Poor old HD HR front miss out.


Sent from my iPhone using Tapatalk

Re: front brake upgrade: semi-huck to duo-servo

Posted: Mon Mar 10, 2025 8:18 pm
by fb delivery
I have a set balljoint front HD HR ute,van
wide front or rear {do'nt remember ] drums
compele with backing plates and shoes
for sale

Re: front brake upgrade: semi-huck to duo-servo

Posted: Mon Mar 10, 2025 8:23 pm
by Blacky
fb delivery wrote: Mon Mar 10, 2025 8:18 pm I have a set balljoint front HD HR ute,van
wide front or rear {do'nt remember ] drums
compele with backing plates and shoes
for sale
The ball joint ones are different mate, they are not interchangable

Re: front brake upgrade: semi-huck to duo-servo

Posted: Mon Mar 10, 2025 9:05 pm
by Errol62
The drums and shoes will be the same, different backing plates and steering knuckle of course.


Sent from my iPhone using Tapatalk

Re: front brake upgrade: semi-huck to duo-servo

Posted: Tue Mar 11, 2025 6:46 am
by Harv
Blacky wrote: Mon Mar 10, 2025 6:46 pm
Errol62 wrote: Mon Mar 10, 2025 4:53 pm They don’t make the wider drums it seems so yes.
Wasn't sure if the drums would interchange with the HR and onwards drums - a master parts cattledog might clear it up but it's all academic anyway
I don't have a humpy or HG parts manual, but the rest are:

FE/FC - 7408918
FB/EK - 7418311
EJ/EH (1¾”) - 7420723
EJ/EH commercial, HD/HR front and HD/HR rear commercial (2¼”) - 7427937
HD/HR rear (except commercial) - 7424784
HR sedan rear heavy duty – 7436683
HK/HT front - 2809197
HK front heavy duty – 2817670
HK rear – 7432369
HT rear – 2809198
HQ front -2819712
HQ/HX/HZ/WB rear – 2813229

Cheers,
Harv