Ford 9" pinion brake

joefarmer

joefarmer

MR. Supreme Overlord
Joined
Jul 31, 2006
Messages
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A few have asked so I'll put up drawings and specs for the pinion brake on my 9". Jeremy @ Firepunk was instrumental in getting these parts drawn. Jason @ HRT and Chris @ Mayer Farm Equipment helped get the designs into metal.

I'm running a Strange big bearing nodular iron case. 35-spline 1350 pinion yoke. I don't know if this fits any other combination so I suggest printing out the pieces in paper or plastic to see if they'll fit for you.

10570548_10152130840700876_368835139556225279_n.jpg
 
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Parts list:
Wilwood 120-6818 Dynalite 4-piston caliper
Wilwood 230-0150 Thread Rotor to Mounting Hat Bolt Kit
Wilwood 160-3201 .350" X 11.75" X 7" Rear Drag 8 Bolt Brake Rotor
1" OD x 3/8" ID x 3" steel spacers (cut down)
3/8" bolts grade 8 for the caliper (can't remember how long)
Jegs 1350 u-joint caps with longer ARP bolts

The DXF files are up here:
http://www.firepunk.com/solidworks/1350%20Ford%209%20Pinion%20Brake/

rotor and yoke adapter:
10525726_10152130840790876_3685585582244938886_n.jpg


Caliper mount:
1011127_10151393119090876_201469382_n.jpg


Test fitting:
995834_10151393313305876_844872572_n.jpg


From the side without the rotor:
10524607_10152114431005876_5582042643659680588_n.jpg


After it went to the track a few times:
10492146_10152226377030876_3656079020142118401_n.jpg
 
curious if you have any pics of how you are bolting the disk onto the stock style yoke? I am looking at building one for either my F106 on my front axle or the 20145 in the rear and I was thinking I would have to go with either a custom yoke or find a bolt together 2pc style yoke....I am liking the idea of possibly using the stock style yoke.

Ryan
 
You can kinda see it in the last picture. Just bolted on the rear side of the yoke using longer bolts in the u-joint girdles.
 
What kind of metal is the disc?

Is it operated/actuated by your foot brake pedal for the rear brakes or do you operate it independent of them?
 
joefarmer said:
You can kinda see it in the last picture. Just bolted on the rear side of the yoke using longer bolts in the u-joint girdles.
Click to expand...

Thanks Man...I scanned all the pics but didn't see that until you pointed it out! Now to see if I can make the yoke work with the rotor/caliper I want to use. Great idea...Thanks!
Ryan
 
SmokeShow said:
What kind of metal is the disc?

Is it operated/actuated by your foot brake pedal for the rear brakes or do you operate it independent of them?
Click to expand...
The rotor is a Wilwood drag rotor (part number is listed above). I have a secondary master cylinder controlling this brake. It's sitting on a dual master cylinder mount with a balance bar between the 4-wheel disc brakes and the pinion brake. I can dial in however much or little pinion brake that I need on the foot brake pedal in the cab.
 
Any idea how much boost it will hold till? Weights not an issue for me (actually benificial on the front end and I was thinking of running a rotor and calipers off a brand new F550 axle I am building my new f106 hybrid steer axle out of.

Ryan
 
I somehow missed this the first time around. Very nice work! Thanks for sharing.
 
Awsome idea. But my lord I need to teach you how to safety wire.:doh:
 
RyanB said:
Any idea how much boost it will hold till? Weights not an issue for me (actually benificial on the front end and I was thinking of running a rotor and calipers off a brand new F550 axle I am building my new f106 hybrid steer axle out of.

Ryan
Click to expand...
That depends on so many things. With a tight converter and cold pads, it held ~10-12psi. No idea what it would hold in your application.


I sent Jason a picture of the safety wire and he had the same response. He never stopped by to help, so I just ran them. Figured poorly executed was better than nothing. LOL
 
Perfect thanks....One other questions for you. The bracket that bolts to the diff and holds the caliper...just curious if its strong enough? looks pretty thin and then with the spacer, it looks like there could be a lot of force that could want to torque and bend the bracket.

Just curious...Ryan
 
I was thinking the same thing Ryan, BUT if you look at any of the kits to convert to disk brakes for say a 14BFF GM, the flange in those kits are no thicker than what Brandon has, most are probably thinner. So I figure it seems ok.
 
So it works along with the other brakes off the same brake pedal? If so slowing down could get little scary of you have to get on the brakes hard...
 
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It's the same bracket thickness as the rest of the brake discs. Doesn't show any deflection under braking and I'm not too worried.


I grabbed them as hard as I could at Kilkare, Josh. No issues with the back end coming around. The balance bar lets it feel like the rear axle just stops really well and no more.
 
I've got all my stuff ordered and the brackets made. The rotor has been discontinued says all the places I looked. But I called Wilwood and they said they had twenty something of them. So they are available. I just need to check on the second MC and balancer.
 

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Which MC did you use? I'm seeing a few different ones from wilwood.
I am eye balling the 260-6765 from wilwood.
Or wondering if I can hook up a 12v in line valve.
 
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